Abstract:
A fluid ejection device is provided. The fluid ejection device includes at least one accelerating unit disposed inside the device for accelerating the fluid before it is ejected out, for increasing the velocity of the ejected fluid.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates generally to a fluid ejection device, and more particularly to a two-fluid sprayer including an accelerating unit having a reduced cross-section area disposed therein, for accelerating the fluid to be ejected out, the accelerating unit being adapted for uniformly ejecting the two fluids. 
         [0003]    2. The Prior Arts 
         [0004]    A nozzle is an application of the liquid atomizing principle. Nozzles are typically divided into a single fluid type and a two-fluid type. A single fluid type nozzle is also known as a liquid pressure nozzle, which employs a pump to increase the pressure of the liquid, so as to drive the liquid to pass through a specific structure of the nozzle and eject from an exit of the nozzle. Such a nozzle usually produces sprayed particles having relative large sizes. When it is desired to obtain sprayed particles having smaller sizes, the pressure should be further increased and/or a nozzle having a smaller aperture size should be used. However, in order to further increase the pressure of the liquid, a stronger pump must be used, and when using a nozzle having a smaller aperture, the nozzle is more likely to be jammed. A two-fluid type nozzle is also known as a gas assisted nozzle, which employs high pressure gas, e.g., gas, for impacting the liquid and destroying the surface tension of the liquid, and assisting the atomization of the liquid. The atomized liquid particles are then dispersed out from an exit. Comparing with the single fluid nozzle, the two-fluid nozzle is adapted for producing smaller particles with a nozzle having a larger aperture size, and therefore the two-fluid nozzle is not likely to be jammed, and the flow rate of the fluid can be adjusted within a wider range. 
         [0005]    A typical two-fluid nozzle includes an atomizing structure which can be either an internal atomizing type or an external atomizing type. The external atomizing type is featured in directly impacting the liquid with the gas after the liquid dispatching from the nozzle, thus the gas and the liquid are mixed into an atomized mixture. The external atomizing type configures the atomized mixture at an outside of the nozzle, and therefore there is no pressure to be further utilized. As to the internal atomizing type, it is featured in supplying the gas inside a body of the nozzle, and the gas is guided to impact the liquid, so that the liquid and the gas are combined into a mixture by a mixing chamber. The mixture is then configured into a desired dispersing mode by different types of exit orifices (a round hole shape, a strip shape opening, etc.) and sprayed onto a desired surface. The external atomizing type is often used for moisturizing the environment, gas cooling, or the like, while the internal atomizing type is often used for workpiece washing, liquid distributing, and billet cooling, etc., in accordance to the design of the exit orifice. Regarding the current two-fluid nozzle, it is difficult to simultaneously satisfy desires for less gas consumption, smaller liquid particle sizes, and greater impact force, because these three conditions are interacted each other. For example, less gas consumption likely leads to a smaller impact force and larger liquid particle sizes, or otherwise, smaller particle liquid sizes and a greater impact force usually demand for more gas consumption. When a large amount of gas is consumed, the consumed gas takes away a large percentage of liquid particles. Or if an orifice having a smaller aperture is used for increasing the velocity of the particles and improving the impact force, the gas can be accelerated at most approaching to the sonic velocity. As such, using an orifice having a smaller aperture would not satisfy all of the foregoing desired three conditions. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention provides a fluid ejection device having an accelerating unit. The fluid ejection device can be an internal atomizing type two-fluid sprayer. The two-fluid sprayer includes a nozzle. The nozzle includes a mixing chamber for allowing a gas impacting a liquid. The mixing chamber is equipped with an accelerating unit therein. The accelerating unit can be a Venturi tube as shown in  FIG. 7 , or an orifice as shown in  FIG. 8 . The accelerating unit is adapted for increasing a velocity of liquid particles without increasing a gas pressure, and recycling consumed gas. By employing such an accelerating unit, the fluid ejection device can use a lower gas pressure for atomizing, and consumes less gas, thus improving the efficiency of pressure utilization. 
         [0007]    A primary objective of the present invention is to provide a fluid ejection device having one or a multi-segment type accelerating unit disposed in a body of the fluid ejection device, for accelerating a fluid velocity. The fluid ejection device can be a two-fluid sprayer. In a conventional two-fluid sprayer, the compressed gas can be utilized only once, and most of the compressed gas disappears after the once utilization of accelerating. On the contrary, according to the present invention, because of the employment of the accelerating unit, the utilized gas can be repetitively recycled for repetitively accelerating the liquid particles, for achieving a desired particle velocity. When the particle velocity and the particle sizes satisfy the desire, then the pressure of the gas can be reduced. As such, the present invention employing a nozzle having an accelerating unit is adapted for increasing the particle velocity without increasing the gas pressure, and thus consuming less gas. 
         [0008]    Another objective of the present invention is to simultaneously obtain a greater impact force and smaller liquid particle sizes by employing an accelerating unit. Liquid particles having a higher velocity are likely to be further split to achieve finer sizes. Particles having a higher velocity and finer sizes often correspond to a higher working efficiency in certain processing, such as billet cooling in iron and steel industry, washing LCD glass substrate, environment moisturizing and disinfecting. 
         [0009]    The liquid ejection device employing the accelerating unit can be a gas knife type atomizer as shown in  FIGS. 5 and 6 . The gas knife type atomizer includes an atomizing mechanism and at least one accelerating unit. In such a way, the liquid ejection device can produce a two-fluid ejection flow which can be accelerated and homogenized by the accelerating unit. Such a two-fluid ejection flow achieves an atomizing effect almost completely uniform and perpendicular with a surface desired to be sprayed thereon, thus providing a solution for the difficulty of multiple fan-shaped two-fluid nozzles producing uneven atomizing effect. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]    The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which: 
           [0011]      FIG. 1  is a schematic diagram illustrating a two-fluid nozzle structure having no accelerating unit. 
           [0012]      FIG. 2  is a schematic diagram illustrating a two-fluid nozzle employing a Venturi tube as an accelerating unit according to an embodiment of the present invention. 
           [0013]      FIG. 3  is a schematic diagram illustrating a two-fluid nozzle employing two Venturi tubes as an accelerating unit according to an embodiment of the present invention. 
           [0014]      FIG. 4   a  is a schematic diagram illustrating a two-fluid nozzle employing an orifice as an accelerating unit according to an embodiment of the present invention. 
           [0015]      FIG. 4   b  is a schematic diagram illustrating a two-fluid nozzle employing two orifices as an accelerating unit according to an embodiment of the present invention. 
           [0016]      FIG. 5  is a schematic diagram illustrating a gas knife type atomizer employing a Verturi tube as an accelerating unit according to an embodiment of the present invention. 
           [0017]      FIG. 6  is a schematic diagram illustrating a gas knife type atomizer employing an orifice as an accelerating unit according to an embodiment of the present invention. 
           [0018]      FIG. 7  is a schematic diagram illustrating a Venturi tube. 
           [0019]      FIG. 8  is a schematic diagram illustrating an orifice. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0020]    The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention, a fluid ejection device, and specifically, a two-fluid sprayer. 
         [0021]    The two-fluid sprayer is an internal atomizing type sprayer. The two-fluid sprayer includes a mixing chamber for allowing a gas impacting a liquid therein. The mixing chamber is disposed with an accelerating unit having a reduced cross-section area. The gas and the liquid enter the mixing chamber, and are uniformly mixed, and then pass through the accelerating unit. The accelerating unit for example can be a Venturi tube  702  (or  704 ) having an inside wall convergent at one end and gradually divergent at another end. The convergent end of the accelerating unit is connected to an exit of the mixing chamber. As such, when the liquid or the gas flows through the convergent inside wall, because of the smaller cross-section area thereof, the flow velocity of the two-fluid is accelerated. The accelerating unit can also be an orifice or an opening  802  (or  804 ) as shown in  FIG. 8 , which can also accelerate the flow velocity. Hence, an embodiment is given below for comparing a particle velocity of a nozzle employing an accelerating unit according to the present invention with that of the conventional nozzle that does not include such an accelerating unit at the exits of the nozzles, respectively. When the liquid is impacted by the gas to configure very fine liquid particles. Such liquid particles have become inconsecutive phase. As such, when the liquid particles reach the exit of the nozzle, the velocity thereof can not be measured by the conservation law of momentum (m 1 v 1 =m 2 v 2 , m representing a mass of a particle, v representing a velocity of the particle). Instead, the velocity should be calculated in accordance with the conservation law of momentum, the conservation law of mass, and the conservation law of energy. The principle is to be further described herebelow. 
         [0022]    According to a preferred embodiment of the present invention, referring to  FIG. 2 , it illustrates a two-fluid nozzle  200  including a Venturi tube. 
         [0023]    The liquid particle velocity of the conventional two-fluid nozzle having no accelerating unit is to be compared with the liquid particle velocity at the exit of the two-fluid nozzle employing an accelerating unit according to the embodiment of the present invention. 
         [0024]      FIG. 1  illustrates a conventional two-fluid nozzle  100  having no accelerating unit. The two-fluid nozzle  100  includes left to right sequentially disposed a mixing chamber  101  and an exit orifice  102 . 
         [0025]    Conditions of the conventional two-fluid nozzle  100  having no accelerating unit are listed below: 
         [0026]    (a) in the mixing chamber  101 ,
       gas velocity: 15 m/s;   liquid particle velocity: 7.5 m/s; liquid particle size: 30 μm;   temperature: 25° C.;   pressure: 3 kg/cm 2 G;   inner diameter of chamber, D 11 : 6 m/m;       
 
         [0032]    (b) length from PT 11  to PT 12 , d 11 : 5 mm, 
         [0033]    (c) at the exit  102 ,
       exit diameter, D 12 : 1.8 m/m;       
 
         [0035]    (d) length from PT 12  to PT 13 , d 12 : 5 mm. 
         [0036]      FIG. 2  is a schematic diagram illustrating the two-fluid nozzle  200  employing a Venturi tube  202  as an accelerating unit according to an embodiment of the present invention. The two-fluid nozzle  200  includes left-to-right sequentially disposed a mixing chamber  201 , a Venturi tube  202 , a recovery portion  203 , and an exit orifice  204 . 
         [0037]    Conditions of the two-fluid nozzle  200  employing a Venturi tube  202  are listed below: 
         [0038]    (a) in the mixing chamber  201 ,
       gas velocity: 15 m/s;   liquid particle velocity: 7.5 m/s;   liquid particle size: 30 μm;   temperature: 25° C.;   pressure: 3 kg/cm 2 G;   inner diameter of chamber, D 21 : 6 m/m;       
 
         [0045]    (b) length from PT 21  to PT 22 , d 21 : 5 mm, 
         [0046]    (c) Venturi tube  202 ,
       minimum diameter, D 22 : 1.8 m/m;       
 
         [0048]    (d) length from PT 22  to PT 23 , d 22 : 5 mm; 
         [0049]    (e) recovery portion  203 ,
       inner chamber diameter, D 23 : 6 m/m;       
 
         [0051]    (f) length from PT 23  to PT 24 , d 23 : 5 mm; 
         [0052]    (g) exit orifice  204 ,
       exit orifice diameter, D 24 : 1.8 m/m       
 
         [0054]    (h) length from PT 24  to PT 25 , d 24 : 5 mm. 
         [0055]    In accordance the foregoing embodiment, all conditions except the accelerating unit of the conventional nozzle and the present invention are equivalent, and it is assumed that the liquid particles maintain their size (30 μm) unchanged when accelerating the particle velocity. According to a one-dimensional calculation, and numerical analysis is made to the foregoing, results are listed in Tables 1-1 through 1-2, and Tables 2-1 through 2-4. 
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 1-1 
               
               
                   
               
             
             
               
                 PRESSURE = 0.3920E+06 PA 
                 TEMPERATURE = 298.00 K 
                 VELOCITY = 15.0000 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 15.0000 
                 298.00 
                 0.3920E+06 
                 7.5000 
                 298.00 
               
               
                 0.0002 
                 15.0840 
                 298.00 
                 0.3920E+06 
                 7.7981 
                 298.00 
               
               
                 0.0004 
                 15.3375 
                 297.99 
                 0.3919E+06 
                 8.0804 
                 298.00 
               
               
                 0.0006 
                 15.7692 
                 297.98 
                 0.3919E+06 
                 8.3581 
                 298.00 
               
               
                 0.0008 
                 16.3944 
                 297.97 
                 0.3918E+06 
                 8.6411 
                 298.00 
               
               
                 0.0010 
                 17.2353 
                 297.95 
                 0.3917E+06 
                 8.9393 
                 298.00 
               
               
                 0.0012 
                 18.3230 
                 297.93 
                 0.3916E+06 
                 9.2629 
                 298.00 
               
               
                 0.0014 
                 19.6984 
                 297.91 
                 0.3915E+06 
                 9.6231 
                 297.99 
               
               
                 0.0016 
                 21.4149 
                 297.87 
                 0.3913E+06 
                 10.0330 
                 297.99 
               
               
                 0.0018 
                 23.5417 
                 297.82 
                 0.3910E+06 
                 10.5079 
                 297.98 
               
               
                 0.0020 
                 26.1667 
                 297.76 
                 0.3906E+06 
                 11.0662 
                 297.98 
               
               
                 0.0022 
                 29.4014 
                 297.67 
                 0.3901E+06 
                 11.7302 
                 297.97 
               
               
                 0.0024 
                 33.3861 
                 297.55 
                 0.3894E+06 
                 12.5270 
                 297.95 
               
               
                 0.0026 
                 38.2949 
                 297.38 
                 0.3885E+06 
                 13.4881 
                 297.93 
               
               
                 0.0028 
                 44.3412 
                 297.13 
                 0.3871E+06 
                 14.6518 
                 297.90 
               
               
                 0.0030 
                 51.7799 
                 296.79 
                 0.3852E+06 
                 16.0624 
                 297.86 
               
               
                 0.0032 
                 60.9054 
                 296.29 
                 0.3825E+06 
                 17.7701 
                 297.81 
               
               
                 0.0034 
                 72.0396 
                 295.57 
                 0.3785E+06 
                 19.8299 
                 297.74 
               
               
                 0.0036 
                 85.5047 
                 294.54 
                 0.3730E+06 
                 22.2976 
                 297.64 
               
               
                 0.0038 
                 101.5701 
                 293.09 
                 0.3652E+06 
                 25.2247 
                 297.50 
               
               
                 0.0040 
                 120.3645 
                 291.07 
                 0.3546E+06 
                 28.6476 
                 297.32 
               
               
                 0.0042 
                 141.7343 
                 288.36 
                 0.3406E+06 
                 32.5750 
                 297.08 
               
               
                 0.0044 
                 165.0151 
                 284.92 
                 0.3234E+06 
                 36.9707 
                 296.78 
               
               
                 0.0046 
                 188.6433 
                 280.89 
                 0.3038E+06 
                 41.7319 
                 296.41 
               
               
                 0.0048 
                 209.4614 
                 276.93 
                 0.2846E+06 
                 46.6648 
                 295.99 
               
               
                 0.0050 
                 222.0081 
                 274.41 
                 0.2710E+06 
                 51.4625 
                 295.55 
               
               
                 0.0052 
                 43.6589 
                 298.02 
                 0.3186E+06 
                 51.3653 
                 295.58 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 1-2 
               
               
                   
               
             
             
               
                 0.0054 
                 43.6574 
                 298.01 
                 0.3186E+06 
                 51.3166 
                 295.60 
               
               
                 0.0056 
                 43.6560 
                 298.00 
                 0.3186E+06 
                 51.2683 
                 295.61 
               
               
                 0.0058 
                 43.6545 
                 297.99 
                 0.3186E+06 
                 51.2203 
                 295.63 
               
               
                 0.0060 
                 43.6531 
                 297.98 
                 0.3186E+06 
                 51.1727 
                 295.64 
               
               
                 0.0062 
                 43.6518 
                 297.97 
                 0.3186E+06 
                 51.1253 
                 295.66 
               
               
                 0.0064 
                 43.6504 
                 297.96 
                 0.3186E+06 
                 51.0783 
                 295.67 
               
               
                 0.0066 
                 43.6491 
                 297.95 
                 0.3186E+06 
                 51.0316 
                 295.69 
               
               
                 0.0068 
                 43.6479 
                 297.94 
                 0.3186E+06 
                 50.9852 
                 295.70 
               
               
                 0.0070 
                 43.6466 
                 297.93 
                 0.3186E+06 
                 50.9392 
                 295.72 
               
               
                 0.0072 
                 43.6454 
                 297.92 
                 0.3186E+06 
                 50.8934 
                 295.73 
               
               
                 0.0074 
                 43.6442 
                 297.91 
                 0.3186E+06 
                 50.8480 
                 295.75 
               
               
                 0.0076 
                 43.6430 
                 297.91 
                 0.3186E+06 
                 50.8029 
                 295.76 
               
               
                 0.0078 
                 43.6418 
                 297.90 
                 0.3186E+06 
                 50.7580 
                 295.78 
               
               
                 0.0080 
                 43.6407 
                 297.89 
                 0.3186E+06 
                 50.7135 
                 295.79 
               
               
                 0.0082 
                 43.6396 
                 297.88 
                 0.3186E+06 
                 50.6693 
                 295.80 
               
               
                 0.0084 
                 43.6385 
                 297.87 
                 0.3186E+06 
                 50.6254 
                 295.82 
               
               
                 0.0086 
                 43.6375 
                 297.86 
                 0.3186E+06 
                 50.5818 
                 295.83 
               
               
                 0.0088 
                 43.6365 
                 297.85 
                 0.3186E+06 
                 50.5384 
                 295.84 
               
               
                 0.0090 
                 43.6355 
                 297.85 
                 0.3186E+06 
                 50.4954 
                 295.86 
               
               
                 0.0092 
                 43.6345 
                 297.84 
                 0.3186E+06 
                 50.4527 
                 295.87 
               
               
                 0.0094 
                 43.6335 
                 297.83 
                 0.3186E+06 
                 50.4102 
                 295.88 
               
               
                 0.0096 
                 43.6326 
                 297.82 
                 0.3186E+06 
                 50.3680 
                 295.90 
               
               
                 0.0098 
                 43.6317 
                 297.81 
                 0.3186E+06 
                 50.3262 
                 295.91 
               
               
                 0.0100 
                 43.6308 
                 297.81 
                 0.3186E+06 
                 50.2845 
                 295.92 
               
               
                   
               
               
                 Stop-Program terminated 
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2-1 
               
               
                   
               
             
             
               
                 PRESSURE = 0.3920E+06 PA 
                 TEMPERATURE = 298.00 K 
                 VELOCITY = 15.0000 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 15.0000 
                 298.00 
                 0.3920E+06 
                 7.5000 
                 298.00 
               
               
                 0.0002 
                 15.0840 
                 298.00 
                 0.3920E+06 
                 7.7981 
                 298.00 
               
               
                 0.0004 
                 15.3375 
                 297.99 
                 0.3919E+06 
                 8.0804 
                 298.00 
               
               
                 0.0006 
                 15.7692 
                 297.98 
                 0.3919E+06 
                 8.3581 
                 298.00 
               
               
                 0.0008 
                 16.3944 
                 297.97 
                 0.3918E+06 
                 8.6411 
                 298.00 
               
               
                 0.0010 
                 17.2353 
                 297.95 
                 0.3917E+06 
                 8.9393 
                 298.00 
               
               
                 0.0012 
                 18.3230 
                 297.93 
                 0.3916E+06 
                 9.2629 
                 298.00 
               
               
                 0.0014 
                 19.6984 
                 297.91 
                 0.3915E+06 
                 9.6231 
                 297.99 
               
               
                 0.0016 
                 21.4149 
                 297.87 
                 0.3913E+06 
                 10.0330 
                 297.99 
               
               
                 0.0018 
                 23.5417 
                 297.82 
                 0.3910E+06 
                 10.5079 
                 297.98 
               
               
                 0.0020 
                 26.1667 
                 297.76 
                 0.3906E+06 
                 11.0662 
                 297.98 
               
               
                 0.0022 
                 29.4014 
                 297.67 
                 0.3901E+06 
                 11.7302 
                 297.97 
               
               
                 0.0024 
                 33.3861 
                 297.55 
                 0.3894E+06 
                 12.5270 
                 297.95 
               
               
                 0.0026 
                 38.2949 
                 297.38 
                 0.3885E+06 
                 13.4881 
                 297.93 
               
               
                 0.0028 
                 44.3412 
                 297.13 
                 0.3871E+06 
                 14.6518 
                 297.90 
               
               
                 0.0030 
                 51.7799 
                 296.79 
                 0.3852E+06 
                 16.0624 
                 297.86 
               
               
                 0.0032 
                 60.9054 
                 296.29 
                 0.3825E+06 
                 17.7701 
                 297.81 
               
               
                 0.0034 
                 72.0396 
                 295.57 
                 0.3785E+06 
                 19.8299 
                 297.74 
               
               
                 0.0036 
                 85.5047 
                 294.54 
                 0.3730E+06 
                 22.2976 
                 297.64 
               
               
                 0.0038 
                 101.5701 
                 293.09 
                 0.3652E+06 
                 25.2247 
                 297.50 
               
               
                 0.0040 
                 120.3645 
                 291.07 
                 0.3546E+06 
                 28.6476 
                 297.32 
               
               
                 0.0042 
                 141.7343 
                 288.36 
                 0.3406E+06 
                 32.5750 
                 297.08 
               
               
                 0.0044 
                 165.0151 
                 284.92 
                 0.3234E+06 
                 36.9707 
                 296.78 
               
               
                 0.0046 
                 188.6433 
                 280.89 
                 0.3038E+06 
                 41.7319 
                 296.41 
               
               
                 0.0048 
                 209.4614 
                 276.93 
                 0.2846E+06 
                 46.6648 
                 295.99 
               
               
                 0.0050 
                 222.0081 
                 274.41 
                 0.2710E+06 
                 51.4625 
                 295.55 
               
               
                 0.0052 
                 220.5595 
                 274.89 
                 0.2683E+06 
                 55.7403 
                 295.16 
               
               
                 0.0054 
                 205.4792 
                 278.20 
                 0.2762E+06 
                 59.1998 
                 294.86 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 2-2 
               
               
                   
               
             
             
               
                 0.0056 
                 182.9338 
                 282.62 
                 0.2894E+06 
                 61.7639 
                 294.65 
               
               
                 0.0058 
                 158.4672 
                 286.81 
                 0.3030E+06 
                 63.5275 
                 294.53 
               
               
                 0.0060 
                 135.1195 
                 290.22 
                 0.3149E+06 
                 64.6537 
                 294.47 
               
               
                 0.0062 
                 114.2362 
                 292.80 
                 0.3244E+06 
                 65.3112 
                 294.44 
               
               
                 0.0064 
                 96.2492 
                 294.68 
                 0.3315E+06 
                 65.6470 
                 294.44 
               
               
                 0.0066 
                 81.1219 
                 296.00 
                 0.3366E+06 
                 65.7793 
                 294.45 
               
               
                 0.0068 
                 68.5948 
                 296.93 
                 0.3403E+06 
                 65.7998 
                 294.46 
               
               
                 0.0070 
                 52.3218 
                 297.57 
                 0.3429E+06 
                 65.7745 
                 294.47 
               
               
                 0.0072 
                 49.9433 
                 298.01 
                 0.3447E+06 
                 65.6909 
                 294.49 
               
               
                 0.0074 
                 43.1308 
                 298.31 
                 0.3460E+06 
                 65.5397 
                 294.52 
               
               
                 0.0076 
                 37.5989 
                 298.52 
                 0.3469E+06 
                 65.3228 
                 294.55 
               
               
                 0.0078 
                 33.1080 
                 298.67 
                 0.3476E+06 
                 65.0464 
                 294.58 
               
               
                 0.0080 
                 29.4623 
                 298.77 
                 0.3418E+06 
                 64.7184 
                 294.62 
               
               
                 0.0082 
                 26.5038 
                 298.85 
                 0.3485E+06 
                 64.3468 
                 294.66 
               
               
                 0.0084 
                 24.1068 
                 298.90 
                 0.3488E+06 
                 63.9388 
                 294.70 
               
               
                 0.0086 
                 22.1721 
                 298.94 
                 0.3490E+06 
                 63.5014 
                 294.74 
               
               
                 0.0088 
                 20.6219 
                 298.97 
                 0.3492E+06 
                 63.0406 
                 294.78 
               
               
                 0.0090 
                 19.3959 
                 298.99 
                 0.3493E+06 
                 62.5617 
                 294.82 
               
               
                 0.0092 
                 18.4478 
                 299.00 
                 0.3494E+06 
                 62.0696 
                 294.87 
               
               
                 0.0094 
                 17.7428 
                 299.01 
                 0.3495E+06 
                 61.5686 
                 294.91 
               
               
                 0.0096 
                 17.2557 
                 299.01 
                 0.3496E+06 
                 61.0625 
                 294.95 
               
               
                 0.0098 
                 16.9693 
                 299.01 
                 0.3496E+06 
                 60.5551 
                 294.99 
               
               
                 0.0100 
                 16.8737 
                 299.01 
                 0.3497E+06 
                 60.0497 
                 295.04 
               
               
                   
               
               
                 Stop-Program terminated 
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2-3 
               
               
                   
               
             
             
               
                 PRESSURE 0.3497E+06 PA 
                 TEMPERATURE = 299.01 K 
                 VELOCITY = 16.8737 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 16.8737 
                 299.01 
                 0.3497E+06 
                 60.0497 
                 295.04 
               
               
                 0.0002 
                 16.9656 
                 299.00 
                 0.3497E+06 
                 59.5500 
                 295.08 
               
               
                 0.0004 
                 17.2481 
                 298.99 
                 0.3497E+06 
                 59.0589 
                 295.12 
               
               
                 0.0006 
                 17.7310 
                 298.98 
                 0.3497E+06 
                 58.5800 
                 295.16 
               
               
                 0.0008 
                 18.4313 
                 298.96 
                 0.3497E+06 
                 58.1168 
                 295.20 
               
               
                 0.0010 
                 19.3740 
                 298.94 
                 0.3497E+06 
                 57.6732 
                 295.24 
               
               
                 0.0012 
                 20.5936 
                 298.91 
                 0.3496E+06 
                 57.2533 
                 295.28 
               
               
                 0.0014 
                 22.1362 
                 298.86 
                 0.3495E+06 
                 56.8616 
                 295.32 
               
               
                 0.0016 
                 24.0616 
                 298.81 
                 0.3494E+06 
                 56.5034 
                 295.36 
               
               
                 0.0018 
                 26.4473 
                 298.74 
                 0.3492E+06 
                 56.1841 
                 295.39 
               
               
                 0.0020 
                 29.3920 
                 298.65 
                 0.3488E+06 
                 55.9096 
                 295.42 
               
               
                 0.0022 
                 33.0207 
                 298.53 
                 0.3484E+06 
                 55.6858 
                 295.45 
               
               
                 0.0024 
                 37.4911 
                 298.36 
                 0.3478E+06 
                 55.5184 
                 295.48 
               
               
                 0.0026 
                 42.9988 
                 298.12 
                 0.3469E+06 
                 55.4106 
                 295.50 
               
               
                 0.0028 
                 49.7839 
                 297.80 
                 0.3456E+06 
                 55.3611 
                 295.51 
               
               
                 0.0030 
                 58.1337 
                 297.35 
                 0.3438E+06 
                 55.3550 
                 295.52 
               
               
                 0.0032 
                 68.3794 
                 296.69 
                 0.3412E+06 
                 55.4052 
                 295.53 
               
               
                 0.0034 
                 80.8911 
                 295.75 
                 0.3374E+06 
                 55.5769 
                 295.53 
               
               
                 0.0036 
                 96.0524 
                 294.41 
                 0.3319E+06 
                 55.9508 
                 295.53 
               
               
                 0.0038 
                 114.2179 
                 292.50 
                 0.3241E+06 
                 56.6253 
                 295.50 
               
               
                 0.0040 
                 135.6493 
                 289.83 
                 0.3133E+06 
                 57.7110 
                 295.43 
               
               
                 0.0042 
                 160.4263 
                 286.20 
                 0.2987E+06 
                 59.3169 
                 295.32 
               
               
                 0.0044 
                 188.3280 
                 281.40 
                 0.2799E+06 
                 61.5271 
                 295.14 
               
               
                 0.0046 
                 218.6468 
                 275.34 
                 0.2569E+06 
                 64.3709 
                 294.87 
               
               
                 0.0048 
                 249.6244 
                 268.25 
                 0.2314E+06 
                 67.7930 
                 294.51 
               
               
                 0.0050 
                 275.2650 
                 261.72 
                 0.2085E+06 
                 71.5983 
                 294.06 
               
               
                 0.0052 
                 51.8910 
                 298.13 
                 0.2682E+06 
                 71.4143 
                 294.10 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 2-4 
               
               
                   
               
             
             
               
                 0.0054 
                 51.8872 
                 298.12 
                 0.2682E+06 
                 71.2973 
                 294.12 
               
               
                 0.0056 
                 51.8835 
                 298.11 
                 0.2682E+06 
                 71.1811 
                 294.15 
               
               
                 0.0058 
                 51.8798 
                 298.10 
                 0.2682E+06 
                 71.0656 
                 294.17 
               
               
                 0.0060 
                 51.8761 
                 298.09 
                 0.2683E+06 
                 70.9508 
                 294.19 
               
               
                 0.0062 
                 51.8725 
                 298.08 
                 0.2683E+06 
                 70.8368 
                 294.22 
               
               
                 0.0064 
                 51.8690 
                 298.07 
                 0.2683E+06 
                 70.7235 
                 294.24 
               
               
                 0.0066 
                 51.8655 
                 298.06 
                 0.2683E+06 
                 70.6110 
                 294.26 
               
               
                 0.0068 
                 518620 
                 298.05 
                 0.2683E+06 
                 70.4992 
                 294.29 
               
               
                 0.0070 
                 51.8586 
                 298.04 
                 0.2683E+06 
                 70.3882 
                 294.31 
               
               
                 0.0072 
                 51.8552 
                 298.02 
                 0.2683E+06 
                 70.2779 
                 294.33 
               
               
                 0.0074 
                 51.8519 
                 298.01 
                 0.2683E+06 
                 70.1683 
                 294.35 
               
               
                 0.0076 
                 51.8486 
                 298.00 
                 0.2683E+06 
                 70.0594 
                 294.38 
               
               
                 0.0078 
                 51.8453 
                 297.99 
                 0.2683E+06 
                 69.9512 
                 294.40 
               
               
                 0.0080 
                 51.8421 
                 297.98 
                 0.2686E+06 
                 69.8437 
                 294.42 
               
               
                 0.0082 
                 51.8390 
                 297.97 
                 0.2683E+06 
                 69.7369 
                 294.44 
               
               
                 0.0084 
                 51.8359 
                 297.96 
                 0.2684E+06 
                 69.6309 
                 294.46 
               
               
                 0.0086 
                 51.8328 
                 297.95 
                 0.2684E+06 
                 69.5255 
                 294.48 
               
               
                 0.0088 
                 51.8297 
                 297.94 
                 0.2684E+06 
                 69.4208 
                 294.50 
               
               
                 0.0090 
                 51.8267 
                 297.93 
                 0.2684E+06 
                 69.3167 
                 294.52 
               
               
                 0.0092 
                 51.8238 
                 297.93 
                 0.2684E+06 
                 69.2134 
                 294.54 
               
               
                 0.0094 
                 51.8208 
                 297.92 
                 0.2684E+06 
                 69.1107 
                 294.56 
               
               
                 0.0096 
                 51.8180 
                 297.91 
                 0.2684E+06 
                 69.0087 
                 294.58 
               
               
                 0.0098 
                 51.8151 
                 297.90 
                 0.2684E+06 
                 68.9097 
                 294.60 
               
               
                 0.0100 
                 51.8123 
                 297.89 
                 0.2684E+06 
                 68.8067 
                 294.62 
               
               
                   
               
               
                 Stop-Program terminated 
               
             
          
         
       
     
         [0056]    As shown in Table 2-4, the data listed in the last line are the data of the two-fluid nozzle  200  at PT 25 , which are: 
         [0057]    gas velocity: 51.8123 m/s; 
         [0058]    gas temperature: 297.89 K; 
         [0059]    pressure: 0.2684×10 6  Pa; 
         [0060]    liquid particle velocity: 68.8067 m/s. 
         [0061]    In comparison, as shown in Table 1-2, the data listed in the last line are the data of the two-fluid nozzle  100  at PT 13 , which are: 
         [0062]    gas velocity: 43.6308 m/s; 
         [0063]    gas temperature: 297.81 K; 
         [0064]    pressure: 0.3186×10 6  Pa; 
         [0065]    liquid particle velocity: 50.2845 m/s. 
         [0066]    It can be known from the foregoing data, the two-fluid nozzle  200  employing a Venturi tube, produces liquid particles having a velocity of 68.8067 m/s at a position 5 mm apart from the exit orifice, while the conventional two-fluid nozzle  100  having no accelerating unit produces liquid particles having a velocity of 50.2845 m/s at a position 5 mm apart from the exit orifice. The difference between the velocities of the liquid particles is 18.5222 m/s. In other words, the accelerating unit effectively accelerates the liquid particles for 36.8%. However, it has also been noted that with respect to the two-fluid nozzle  200 , a pressure loss from the accelerating unit to PT 23  is 10.8. This indicates that there is still potential for further recycle using the pressure. Specifically, it is expectable to employ a plurality of accelerating units in the nozzle. As such, a two-fluid nozzle  300  employing two Venturi tubes  302  and  304  is illustrated below according to the second embodiment. 
         [0067]      FIG. 3  is a schematic diagram illustrating a two-fluid nozzle  300  employing two Venturi tubes as an accelerating unit according to an embodiment of the present invention. 
         [0068]    Referring to  FIG. 3 , the liquid particle velocity of the conventional two-fluid nozzle  100  having no accelerating unit is to be compared with the liquid particle velocity at the exit of the two-fluid nozzle  300  employing two accelerating units according to the embodiment of the present invention. 
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 3-1 
               
               
                   
               
             
             
               
                 PRESSURE = 0.3920E+06 PA 
                 TEMPERATURE = 298.00 K 
                 VELOCITY = 15.0000 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 15.0000 
                 298.00 
                 0.3920E+06 
                 7.5000 
                 298.00 
               
               
                 0.0002 
                 15.0840 
                 298.00 
                 0.3920E+06 
                 7.7984 
                 298.00 
               
               
                 0.0004 
                 15.3375 
                 297.99 
                 0.3919E+06 
                 8.0809 
                 298.00 
               
               
                 0.0006 
                 15.7692 
                 297.98 
                 0.3919E+06 
                 8.3588 
                 298.00 
               
               
                 0.0008 
                 16.3944 
                 297.97 
                 0.3918E+06 
                 8.6420 
                 298.00 
               
               
                 0.0010 
                 17.2353 
                 297.95 
                 0.3917E+06 
                 8.9405 
                 298.00 
               
               
                 0.0012 
                 18.3230 
                 297.93 
                 0.3916E+06 
                 9.2643 
                 298.00 
               
               
                 0.0014 
                 19.6984 
                 297.91 
                 0.3915E+06 
                 9.6247 
                 297.99 
               
               
                 0.0016 
                 21.4149 
                 297.87 
                 0.3913E+06 
                 10.0349 
                 297.99 
               
               
                 0.0018 
                 23.5417 
                 297.82 
                 0.3910E+06 
                 10.5100 
                 297.98 
               
               
                 0.0020 
                 26.1667 
                 297.76 
                 0.3906E+06 
                 11.0685 
                 297.98 
               
               
                 0.0022 
                 29.4014 
                 297.67 
                 0.3901E+06 
                 11.7328 
                 297.97 
               
               
                 0.0024 
                 33.3860 
                 297.55 
                 0.3894E+06 
                 12.5298 
                 297.95 
               
               
                 0.0026 
                 38.2949 
                 297.38 
                 0.3885E+06 
                 13.4912 
                 297.93 
               
               
                 0.0028 
                 44.3412 
                 297.13 
                 0.3871E+06 
                 14.6552 
                 297.90 
               
               
                 0.0030 
                 51.7799 
                 296.79 
                 0.3852E+06 
                 16.0662 
                 297.86 
               
               
                 0.0032 
                 60.9053 
                 296.29 
                 0.3825E+06 
                 17.7744 
                 297.81 
               
               
                 0.0034 
                 72.0395 
                 295.57 
                 0.3785E+06 
                 19.8347 
                 297.74 
               
               
                 0.0036 
                 85.5044 
                 294.54 
                 0.3730E+06 
                 22.3032 
                 297.64 
               
               
                 0.0038 
                 101.5696 
                 293.29 
                 0.3652E+06 
                 25.2311 
                 297.5 
               
               
                 0.0040 
                 120.3636 
                 291.07 
                 0.3546E+06 
                 28.6551 
                 297.32 
               
               
                 0.0042 
                 141.7328 
                 288.36 
                 0.3406E+06 
                 32.5840 
                 297.08 
               
               
                 0.0044 
                 165.0124 
                 284.92 
                 0.3234E+06 
                 36.9815 
                 296.78 
               
               
                 0.0046 
                 188.6384 
                 280.90 
                 0.3038E+06 
                 41.7449 
                 296.41 
               
               
                 0.0048 
                 209.4528 
                 276.93 
                 0.2846E+06 
                 46.6802 
                 295.99 
               
               
                 0.0050 
                 221.9946 
                 274.41 
                 0.2710E+06 
                 51.4809 
                 295.56 
               
               
                 0.0052 
                 220.5424 
                 274.89 
                 0.2683E+06 
                 55.7619 
                 295.16 
               
               
                 0.0054 
                 205.4619 
                 278.20 
                 0.2762E+06 
                 59.2251 
                 294.86 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 3-2 
               
               
                   
               
             
             
               
                 0.0056 
                 182.9184 
                 282.62 
                 0.2894E+06 
                 61.7933 
                 294.65 
               
               
                 0.0058 
                 158.4541 
                 286.81 
                 0.3031E+06 
                 63.5612 
                 294.53 
               
               
                 0.0060 
                 135.1086 
                 290.22 
                 0.3149E+06 
                 64.6918 
                 294.47 
               
               
                 0.0062 
                 114.2272 
                 292.81 
                 0.3244E+06 
                 65.3538 
                 294.44 
               
               
                 0.0064 
                 96.2417 
                 294.68 
                 0.3315E+06 
                 65.6939 
                 294.44 
               
               
                 0.0066 
                 81.1157 
                 296.00 
                 0.3367E+06 
                 65.8305 
                 294.45 
               
               
                 0.0068 
                 68.5896 
                 296.93 
                 0.3403E+06 
                 65.8551 
                 294.46 
               
               
                 0.0070 
                 58.3175 
                 297.57 
                 0.3429E+06 
                 65.8338 
                 294.47 
               
               
                 0.0072 
                 49.9396 
                 298.01 
                 03447E+06 
                 65.7537 
                 294.49 
               
               
                 0.0074 
                 43.1277 
                 298.31 
                 0.3460E+06 
                 65.6055 
                 294.52 
               
               
                 0.0076 
                 37.5961 
                 298.52 
                 0.3470E+06 
                 65.3913 
                 294.55 
               
               
                 0.0078 
                 33.1056 
                 298.67 
                 0.3476E+06 
                 65.1173 
                 294.59 
               
               
                 0.0080 
                 29.4601 
                 298.77 
                 0.3481E+06 
                 64.7915 
                 294.62 
               
               
                 0.0082 
                 26.5019 
                 298.85 
                 0.3485E+06 
                 64.4218 
                 294.66 
               
               
                 0.0084 
                 24.1051 
                 298.90 
                 0.3488E+06 
                 64.0157 
                 294.70 
               
               
                 0.0086 
                 22.1705 
                 298.94 
                 0.3490E+06 
                 63.5800 
                 294.74 
               
               
                 0.0088 
                 20.6204 
                 298.97 
                 0.3492E+06 
                 63.1207 
                 294.78 
               
               
                 0.0090 
                 19.3945 
                 298.99 
                 0.3493E+06 
                 62.6433 
                 294.83 
               
               
                 0.0092 
                 18.4465 
                 299.00 
                 0.3494E+06 
                 62.1526 
                 294.87 
               
               
                 0.0094 
                 17.7416 
                 299.01 
                 0.3495E+06 
                 61.6528 
                 294.91 
               
               
                 0.0096 
                 17.2545 
                 299.01 
                 0.3496E+06 
                 61.1480 
                 294.95 
               
               
                 0.0098 
                 16.9681 
                 299.01 
                 0.3496E+06 
                 60.6417 
                 295.00 
               
               
                 0.0100 
                 16.8725 
                 299.01 
                 0.3497E+06 
                 60.1373 
                 295.04 
               
               
                   
               
               
                 Stop-Program terminated 
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 3-3 
               
               
                   
               
             
             
               
                 PRESSURE = 0.3497E+06 PA 
                 TEMPERATURE = 299.01 K 
                 VELOCITY = 16.8725 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 16.8725 
                 299.01 
                 0.3497E+06 
                 60.1373 
                 295.04 
               
               
                 0.0002 
                 16.9644 
                 299.00 
                 0.3497E+06 
                 59.6387 
                 295.08 
               
               
                 0.0004 
                 17.2468 
                 298.99 
                 0.3497E+06 
                 59.1487 
                 295.12 
               
               
                 0.0006 
                 17.7297 
                 298.98 
                 0.3497E+06 
                 58.6709 
                 295.16 
               
               
                 0.0008 
                 18.4300 
                 298.96 
                 0.3497E+06 
                 58.2088 
                 295.20 
               
               
                 0.0010 
                 19.3726 
                 298.94 
                 0.3497E+06 
                 57.7662 
                 295.24 
               
               
                 0.0012 
                 20.5921 
                 298.91 
                 0.3496E+06 
                 57.3474 
                 295.28 
               
               
                 0.0014 
                 22.1346 
                 298.87 
                 0.3495E+06 
                 56.9569 
                 295.32 
               
               
                 0.0016 
                 24.0600 
                 298.81 
                 0.3494E+06 
                 56.5999 
                 295.36 
               
               
                 0.0018 
                 26.4455 
                 298.74 
                 0.3492E+06 
                 56.2819 
                 295.39 
               
               
                 0.0020 
                 29.3899 
                 298.65 
                 0.3488E+06 
                 56.0087 
                 295.42 
               
               
                 0.0022 
                 33.0184 
                 298.53 
                 0.3484E+06 
                 55.7864 
                 295.45 
               
               
                 0.0024 
                 37.4884 
                 298.36 
                 0.3478E+06 
                 55.6207 
                 295.48 
               
               
                 0.0026 
                 42.9958 
                 298.13 
                 0.3469E+06 
                 55.5149 
                 295.50 
               
               
                 0.0028 
                 49.7804 
                 297.80 
                 0.3456E+06 
                 55.4676 
                 295.51 
               
               
                 0.0030 
                 58.1295 
                 297.35 
                 0.3438E+06 
                 55.4642 
                 295.52 
               
               
                 0.0032 
                 68.3744 
                 296.69 
                 0.3412E+06 
                 55.5169 
                 295.53 
               
               
                 0.0034 
                 80.8850 
                 295.76 
                 0.3374E+06 
                 55.6906 
                 295.53 
               
               
                 0.0036 
                 96.0447 
                 294.41 
                 0.3319E+06 
                 56.0659 
                 295.53 
               
               
                 0.0038 
                 114.2078 
                 295.20 
                 0.3241E+06 
                 56.7410 
                 295.50 
               
               
                 0.0040 
                 135.6353 
                 289.84 
                 0.3133E+06 
                 57.8264 
                 295.43 
               
               
                 0.0042 
                 160.4058 
                 286.20 
                 0.2988E+06 
                 59.4311 
                 295.32 
               
               
                 0.0044 
                 188.2957 
                 281.41 
                 0.2799E+06 
                 61.6392 
                 295.14 
               
               
                 0.0046 
                 218.5909 
                 275.35 
                 0.2570E+06 
                 64.4800 
                 294.87 
               
               
                 0.0048 
                 249.5154 
                 268.27 
                 0.2315E+06 
                 67.8983 
                 294.51 
               
               
                 0.0050 
                 275.0249 
                 261.79 
                 0.2087E+06 
                 71.6982 
                 294.07 
               
               
                 0.0052 
                 274.1821 
                 262.21 
                 0.2059E+06 
                 75.3599 
                 293.63 
               
               
                 0.0054 
                 245.9218 
                 269.66 
                 0.2237E+06 
                 78.2807 
                 293.31 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 3-4 
               
               
                   
               
             
             
               
                 0.0056 
                 212.3624 
                 277.39 
                 0.2447E+06 
                 80.3610 
                 293.11 
               
               
                 0.0058 
                 180.5033 
                 283.65 
                 0.2631E+06 
                 81.7303 
                 293.00 
               
               
                 0.0060 
                 152.1328 
                 288.35 
                 0.2779E+06 
                 82.5567 
                 292.94 
               
               
                 0.0062 
                 127.6941 
                 291.75 
                 0.2892E+06 
                 82.9981 
                 292.93 
               
               
                 0.0064 
                 107.0963 
                 294.15 
                 0.2974E+06 
                 83.1880 
                 292.93 
               
               
                 0.0066 
                 89.9985 
                 295.82 
                 0.3033E+06 
                 83.2331 
                 292.94 
               
               
                 0.0068 
                 75.9551 
                 296.97 
                 0.3074E+06 
                 83.2167 
                 292.96 
               
               
                 0.0070 
                 64.4950 
                 297.76 
                 0.3103E+06 
                 83.1417 
                 292.98 
               
               
                 0.0072 
                 55.1795 
                 298.30 
                 0.3123E+06 
                 82.9902 
                 293.01 
               
               
                 0.0074 
                 47.6225 
                 298.68 
                 0.3138E+06 
                 82.7621 
                 293.04 
               
               
                 0.0076 
                 41.4957 
                 298.94 
                 0.3148E+06 
                 82.4637 
                 293.09 
               
               
                 0.0078 
                 36.5275 
                 299.12 
                 0.3156E+06 
                 82.1036 
                 293.13 
               
               
                 0.0080 
                 32.4978 
                 299.26 
                 0.3161E+06 
                 81.6909 
                 293.18 
               
               
                 0.0082 
                 29.2291 
                 299.35 
                 0.3165E+06 
                 81.2345 
                 293.23 
               
               
                 0.0084 
                 26.5822 
                 299.43 
                 0.3169E+06 
                 80.7418 
                 293.28 
               
               
                 0.0086 
                 24.4464 
                 299.48 
                 0.3171E+06 
                 80.2199 
                 293.33 
               
               
                 0.0088 
                 22.7355 
                 299.52 
                 0.3173E+06 
                 79.6749 
                 293.38 
               
               
                 0.0090 
                 21.3826 
                 299.55 
                 0.3175E+06 
                 79.1123 
                 293.43 
               
               
                 0.0092 
                 20.3365 
                 299.57 
                 0.3176E+06 
                 78.5366 
                 293.49 
               
               
                 0.0094 
                 19.5587 
                 299.59 
                 0.3177E+06 
                 77.9522 
                 293.54 
               
               
                 0.0096 
                 19.0213 
                 299.60 
                 0.3178E+06 
                 77.3629 
                 293.59 
               
               
                 0.0098 
                 18.7052 
                 299.61 
                 0.3178E+06 
                 76.7722 
                 293.65 
               
               
                 0.0100 
                 18.5996 
                 299.61 
                 0.3179E+06 
                 76.1836 
                 293.70 
               
               
                   
               
               
                 Stop-Program terminated. 
               
               
                 GAS AND LIQUID OROPLET FLOW IN A NOZZLE 
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 3-5 
               
               
                   
               
             
             
               
                 PRESSURE = 0.3197E+06 PA 
                 TEMPERATURE = 299.61 K 
                 VELOCITY = 18.5996 M/S 
               
               
                 INLET DIAMETER = 0.0060 M 
                 EXIT DIAMETER = 0.0018 M 
                 NOZZLE LENGTH = 0.0100 M 
               
               
                   
               
             
          
           
               
                 DISTANCE 
                 VELOCITY 
                 GAS TEMP. 
                 PRESSURE 
                 PARTICLE VEL. 
                 PARTICLE TEMP. 
               
               
                 (M) 
                 (M/S) 
                 (K) 
                 (Pa) 
                 (M/S) 
                 (K) 
               
               
                   
               
               
                 0.0000 
                 18.5996 
                 299.61 
                 0.3179E+06 
                 76.1836 
                 293.70 
               
               
                 0.0002 
                 18.6958 
                 299.61 
                 0.3179E+06 
                 75.5979 
                 293.75 
               
               
                 0.0004 
                 18.9918 
                 299.60 
                 0.3180E+06 
                 75.0206 
                 293.81 
               
               
                 0.0006 
                 19.4974 
                 299.59 
                 0.3180E+06 
                 74.4549 
                 293.86 
               
               
                 0.0008 
                 20.2289 
                 299.58 
                 0.3179E+06 
                 73.9041 
                 293.91 
               
               
                 0.0010 
                 21.2104 
                 299.55 
                 0.3179E+06 
                 73.3717 
                 293.96 
               
               
                 0.0012 
                 22.4749 
                 299.52 
                 0.3178E+06 
                 72.8618 
                 294.01 
               
               
                 0.0014 
                 24.0661 
                 299.48 
                 0.3177E+06 
                 72.3786 
                 294.06 
               
               
                 0.0016 
                 26.0400 
                 299.42 
                 0.3176E+06 
                 71.9268 
                 294.11 
               
               
                 0.0018 
                 28.4675 
                 299.35 
                 0.3174E+06 
                 71.5117 
                 294.15 
               
               
                 0.0020 
                 31.4378 
                 299.25 
                 0.3171E+06 
                 71.1391 
                 294.20 
               
               
                 0.0022 
                 35.0611 
                 299.12 
                 0.3167E+06 
                 70.8151 
                 294.24 
               
               
                 0.0024 
                 39.4727 
                 298.95 
                 0.3161E+06 
                 70.5462 
                 294.27 
               
               
                 0.0026 
                 44.8349 
                 298.741 
                 0.3153E+06 
                 70.3379 
                 294.31 
               
               
                 0.0028 
                 51.3388 
                 298.38 
                 0.3142E+06 
                 70.1940 
                 294.34 
               
               
                 0.0030 
                 59.2014 
                 297.94 
                 0.3126E+06 
                 70.1145 
                 294.36 
               
               
                 0.0032 
                 68.6557 
                 297.33 
                 0.3104E+06 
                 70.0899 
                 294.37 
               
               
                 0.0034 
                 79.9288 
                 296.49 
                 0.3073E+06 
                 70.1047 
                 294.38 
               
               
                 0.0036 
                 93.2066 
                 295.33 
                 0.3031E+06 
                 70.2062 
                 294.39 
               
               
                 0.0038 
                 108.5761 
                 293.78 
                 0.2975E+06 
                 70.4566 
                 294.39 
               
               
                 0.0040 
                 125.9293 
                 291.74 
                 0.2901E+06 
                 70.9218 
                 294.37 
               
               
                 0.0042 
                 144.8248 
                 289.19 
                 0.2809E+06 
                 71.6636 
                 294.32 
               
               
                 0.0044 
                 164.2888 
                 286.20 
                 0.2701E+06 
                 72.7234 
                 294.25 
               
               
                 0.0046 
                 182.5383 
                 283.07 
                 0.2589E+06 
                 74.1004 
                 294.13 
               
               
                 0.0048 
                 196.7513 
                 280.42 
                 0.2492E+06 
                 75.7283 
                 293.99 
               
               
                 0.0050 
                 203.4353 
                 279.13 
                 0.2437E+06 
                 77.4653 
                 293.83 
               
               
                 0.0052 
                 46.9296 
                 298.64 
                 0.2824E+06 
                 77.2310 
                 293.86 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 3-6 
               
               
                   
               
             
             
               
                 0.0054 
                 46.9240 
                 298.63 
                 0.2824E+06 
                 77.0229 
                 293.89 
               
               
                 0.0056 
                 46.9184 
                 298.62 
                 0.2825E+06 
                 76.8164 
                 293.92 
               
               
                 0.0058 
                 46.9129 
                 298.61 
                 0.2825E+06 
                 76.6113 
                 293.96 
               
               
                 0.0060 
                 46.9074 
                 298.60 
                 0.2825E+06 
                 76.4077 
                 239.99 
               
               
                 0.0062 
                 46.9020 
                 298.59 
                 0.2825E+06 
                 76.2056 
                 294.02 
               
               
                 0.0064 
                 46.8966 
                 298.58 
                 0.2826E+06 
                 76.0049 
                 294.05 
               
               
                 0.0066 
                 46.8913 
                 298.57 
                 0.2826E+06 
                 75.8057 
                 294.08 
               
               
                 0.0068 
                 46.8860 
                 298.56 
                 0.2826E+06 
                 75.6079 
                 294.11 
               
               
                 0.0070 
                 46.8808 
                 298.55 
                 0.2826E+06 
                 75.4116 
                 294.14 
               
               
                 0.0072 
                 46.8756 
                 298.54 
                 0.2827E+06 
                 75.2167 
                 294.17 
               
               
                 0.0074 
                 46.8705 
                 298.53 
                 0.2827E+06 
                 75.0231 
                 294.20 
               
               
                 0.0076 
                 46.8654 
                 298.52 
                 0.2827E+06 
                 74.8310 
                 294.22 
               
               
                 0.0078 
                 46.8604 
                 298.51 
                 0.2827E+06 
                 74.6403 
                 294.25 
               
               
                 0.0080 
                 46.8554 
                 298.50 
                 0.2827E+06 
                 74.4509 
                 294.28 
               
               
                 0.0082 
                 46.8505 
                 298.49 
                 0.2828E+06 
                 74.2629 
                 294.31 
               
               
                 0.0084 
                 46.8456 
                 298.48 
                 0.2828E+06 
                 74.0762 
                 294.34 
               
               
                 0.0086 
                 46.8407 
                 298.48 
                 0.2828E+06 
                 73.8910 
                 294.36 
               
               
                 0.0088 
                 46.8360 
                 298.47 
                 0.2828E+06 
                 73.7070 
                 294.39 
               
               
                 0.0090 
                 46.8312 
                 298.46 
                 0.2828E+06 
                 73.5244 
                 294.42 
               
               
                 0.0092 
                 46.8265 
                 298.45 
                 0.2829E+06 
                 73.3431 
                 294.45 
               
               
                 0.0094 
                 46.8218 
                 298.44 
                 0.2829E+06 
                 73.1631 
                 294.47 
               
               
                 0.0096 
                 46.8172 
                 298.43 
                 0.2829E+06 
                 72.9844 
                 294.50 
               
               
                 0.0098 
                 46.8127 
                 298.42 
                 0.2829E+06 
                 72.8070 
                 294.52 
               
               
                 0.0100 
                 46.8082 
                 298.41 
                 0.2829E+06 
                 72.6309 
                 294.55 
               
               
                   
               
               
                 Stop-Program terminated 
               
               
                 Press any key to continue 
               
             
          
         
       
     
         [0069]      FIG. 3  is a schematic diagram illustrating a two-fluid nozzle  300  employing two Venturi tubes as an accelerating unit according to an embodiment of the present invention. The two-fluid nozzle  300  includes left-to-right sequentially disposed a mixing chamber  301 , a Venturi tube  302 , a recovery portion  303 , a Venturi tube  304 , a recovery portion  305 , and an exit orifice  306 . 
         [0070]    Conditions of the two-fluid nozzle  300  are listed below: 
         [0071]    (a) in the mixing chamber  301 ,
       gas velocity: 15 m/s;   liquid particle velocity: 7.5 m/s;   liquid particle size: 30 μm;   temperature: 25° C.;   pressure: 3 kg/cm 2 G;   inner diameter of chamber, D 31 : 6 m/m;       
 
         [0078]    (b) length from PT 31  to PT 32 , d 31 : 5 mm, 
         [0079]    (c) Venturi tube  302 ,
       Diameter, D 32 : 1.8 m/m;       
 
         [0081]    (d) length from PT 32  to PT 33 , d 32 : 5 mm; 
         [0082]    (e) recovery portion  303 ,
       Diameter, D 33 : 6 m/m;       
 
         [0084]    (f) length from PT 33  to PT 34 , d 33 : 5 mm; 
         [0085]    (g) Venturi tube  304 ,
       Diameter, D 34 : 1.8 m/m;       
 
         [0087]    (h) length from PT 34  to PT 35 , d 34 : 5 mm; 
         [0088]    (i) recovery portion  305 ,
       diameter, D 35 : 6 m/m;       
 
         [0090]    (j) length from PT 35  to PT 36 , d 35 : 5 mm; 
         [0091]    (k) exit orifice  306 ,
       exit orifice diameter, D 36 : 2.0 m/m       
 
         [0093]    (l) length from PT 36  to PT 37 , d 36 : 5 min. 
         [0094]    In accordance the foregoing embodiment, all conditions except the accelerating unit of the conventional nozzle and the present invention are equivalent, and it is assumed that the liquid particles maintain their size (30 μm) unchanged when accelerating the particle velocity. According to a one-dimensional calculation, and numerical analysis is made to the foregoing, results are listed in Tables 3-1, 3-2, 3-3, 3-4, 3-5, and 3-6. As shown in Table 3-6, data listed in the last line of Table 3-6 are the data of the two-fluid nozzle  300  at PT 37  (positioned 5 mm to the exit), which are: 
         [0095]    gas velocity: 46.8082 m/s; 
         [0096]    gas temperature: 298.41 K; 
         [0097]    pressure: 0.2829E+6 Pa; 
         [0098]    liquid particle velocity: 72.6306 m/s. 
         [0099]    It can be known from the comparison of the foregoing data, the two-fluid nozzle  300  employing two accelerating units, produces liquid particles having a velocity of 72.6306 m/s at a position 5 mm apart from the exit, while the conventional two-fluid nozzle  100  having no accelerating unit produces liquid particles having a velocity of 50.2845 m/s at a position 5 mm apart from the exit orifice. The difference between the velocities of the liquid particles is 22.3461 m/s. In other words, the accelerating unit effectively accelerates the liquid particles for 44.4%. 
         [0100]    It can be concluded from the foregoing two embodiments that under the conditions of not increasing gas pressure and the diameter of exit orifices (2 m/m) of the two-fluid nozzles  200  and  300  being not smaller than the diameter of exit orifice (1.8 m/m) of the conventional two-fluid nozzle  100  having no accelerating unit, the liquid particles passing through the accelerating unit are effectively accelerated. 
         [0101]      FIG. 4   a  is a schematic diagram illustrating a two-fluid nozzle employing an orifice as an accelerating unit according to an embodiment of the present invention. 
         [0102]      FIG. 4   b  is a schematic diagram illustrating a two-fluid nozzle employing two orifices as an accelerating unit according to an embodiment of the present invention. 
         [0103]      FIG. 5  is a schematic diagram illustrating a gas knife type atomizer employing a Verturi tube as an accelerating unit according to an embodiment of the present invention. The Venturi tube  502  is employed in a gas knife type atomizer  400 , and is adapted for uniformly spraying two-fluid particles with an accelerated velocity on to a surface of a desired object. 
         [0104]      FIG. 6  is a schematic diagram illustrating a gas knife type atomizer employing an orifice as an accelerating unit according to an embodiment of the present invention. 
         [0105]    Although the present invention has been described with reference to the preferred embodiments thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.