Patent Publication Number: US-10774652-B2

Title: Airfoil shape for a compressor

Description:
BACKGROUND 
     The present disclosure relates generally to an airfoil for use in turbomachinery, and more particularly relates to an airfoil profile or airfoil shape for use in a compressor. 
     In turbomachines, many system requirements should be met at each stage of the turbomachine&#39;s flow path to meet design goals. These design goals include, but are not limited to, overall improved efficiency, reduction of vibratory response and improved airfoil loading capability. For example, a compressor airfoil profile should achieve thermal and mechanical operating requirements for a particular stage in the compressor. Moreover, component lifetime, reliability and cost targets also should be met. 
     SUMMARY 
     According to one aspect of the present disclosure, an article of manufacture is provided having a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in a scalable table identified herein as TABLE 1, wherein the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number, and wherein X and Y are coordinates which, when connected by continuing arcs, define airfoil profile sections at each Z height, the airfoil profile sections at each Z height being joined smoothly with one another to form a complete airfoil shape. 
     According to another aspect of the present disclosure, an article of manufacture is provided having a suction-side nominal airfoil profile substantially in accordance with suction-side Cartesian coordinate values of X, Y, and Z set forth in a scalable table identified herein as TABLE 1, wherein the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number, and wherein X and Y are coordinates which, when connected by continuing arcs, define airfoil profile sections at each Z height, the airfoil profile sections at each Z height being joined smoothly with one another to form a complete suction-side airfoil shape, the X, Y, and Z coordinate values being scalable as a function of the number to provide at least one of a non-scaled, scaled-up, and scaled-down airfoil profile. 
     According to yet another aspect of the present disclosure, a compressor is provided comprising a plurality of stator vanes, each of the stator vanes including an airfoil having a suction-side airfoil shape, the airfoil having a nominal profile substantially in accordance with suction-side Cartesian coordinate values of X, Y, and Z set forth in a scalable table identified herein as TABLE 1, wherein the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number, and wherein X and Y are coordinates which, when connected by continuing arcs, define airfoil profile sections at each Z height, the airfoil profile sections at each Z height being joined smoothly with one another to form a complete suction-side airfoil shape. 
     These and other features and improvements of the present disclosure should become apparent to one of ordinary skill in the art upon review of the following detailed description when taken in conjunction with the several drawings and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic representation of a compressor flow path through multiple stages and illustrates exemplary compressor stages, according to an aspect of the disclosure; 
         FIG. 2  is a perspective view of a stator vane, according to an aspect of the disclosure; and 
         FIG. 3  is a cross-sectional view of the stator vane airfoil taken generally about on line  3 - 3  in  FIG. 2 , according to an aspect of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     One or more specific aspects/embodiments of the present compressor stator vane will be described below. In an effort to provide a concise description of these aspects/embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers&#39; specific goals, such as compliance with machine-related, system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. 
     When introducing elements of various embodiments of the presently claimed subject matter, the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Any examples of operating parameters and/or environmental conditions are not exclusive of other parameters/conditions of the disclosed embodiments. Additionally, it should be understood that references to “one embodiment”, “one aspect” or “an embodiment” or “an aspect” of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments or aspects that also incorporate the recited features. Turbomachinery is defined as one or more machines that transfer energy between a rotor and a fluid or vice-versa, including but not limited to gas turbines, steam turbines, and compressors. 
     Referring now to the drawings,  FIG. 1  illustrates an axial compressor  2  that may be used in conjunction with, or as part of, a gas turbine. The compressor  2  includes a plurality of compressor stages. A set of rotating (or rotor) blades and an adjacent set of stationary (or stator) vanes define a compressor stage. Commonly, the stator vanes of a particular stage are downstream of the rotor blades. However, in some designs, the stator vanes may precede the rotor blades. Rotor blades  22  are attached to a rotor or other rotating component within the compressor  2 , while the stator vanes  23  are attached to a stationary casing. It is to be understood that any number of rotor and stator stages can be provided in the compressor, as described herein. 
     The compressor  2  defines a flow path  1  for fluids (e.g., air) being compressed therein, which may include from fourteen to eighteen rotor/stator stages. However, the exact number of rotor and stator stages is a choice of engineering design, and may be more or less than the eighteen stages illustrated in  FIG. 1 . The eighteen stages are merely exemplary of one turbine/compressor design, and are not intended to limit the presently claimed compressor stator vane in any manner. 
     The compressor rotor blades  22  impart kinetic energy to the airflow by accelerating the airflow, and the stator vanes  23  convert the increased rotational kinetic energy into static pressure, bringing about a desired pressure rise. Both the rotor blades  22  and stator vanes  23  turn the airflow, slow the airflow velocity (in the respective airfoil frame of reference), and yield a rise in the static pressure of the airflow. Typically, in axial flow compressors, multiple stages of rotor/stator sets are arranged to achieve a desired discharge-to-inlet pressure ratio. 
     Each rotor blade  22  and stator vane  23  includes an airfoil, and these airfoils can be secured to rotor wheels or a stator case by an appropriate attachment configuration, often known as a “root,” “base,” or “dovetail” (not shown). In addition, compressors may also include inlet guide vanes (IGVs)  21  and exit or exhaust guide vanes (EGVs)  27 . All of these blades and vanes have airfoils that act on the medium (e.g., air) passing through the compressor flow path  1 . 
     Exemplary stages of the compressor  2  are illustrated in  FIG. 1 . One stage of the compressor  2  comprises a plurality of circumferentially spaced rotor blades  22  mounted on a rotor wheel  51  and a plurality of circumferentially spaced stator vanes  23  attached to a static compressor case  59 . Each of the rotor wheels  51  may be attached to an aft drive shaft  58 , which may be connected to the turbine section of the engine. The rotor blades  22  and stator vanes  23  lie in the flow path  1  of the compressor  2 . The direction of airflow through the compressor flow path  1 , as described herein, is indicated by the arrow  60  ( FIG. 1 ), and flows generally from left to right in the illustration. The rotor blades and stator vanes herein of the compressor  2  are merely exemplary of the stages of the compressor  2  within the scope of the present disclosure. In addition, each inlet guide vane  21 , rotor blade  22 , stator vane  23 , and exit guide vane  27  may be considered an article of manufacture. Further, the article of manufacture described herein may be a stator vane configured for use with the compressor  2 . 
     A stator vane  23 , illustrated in  FIG. 2 , is provided with an airfoil  200 . Each of the stator vanes  23  has an airfoil profile at any cross-section from the airfoil root  220  to the airfoil tip  210 . Referring to  FIG. 3 , it will be appreciated that each stator vane  23  has an airfoil  200  as illustrated. The airfoil  200  has a suction side  310  and a pressure side  320 . The suction side  310  is located on the opposing side of the airfoil from the pressure side  320 . Thus, each of the stator vanes  23  has an airfoil profile at any cross-section in the shape of the airfoil  200 . The airfoil  200  also includes a leading edge  330  and a trailing edge  340 , and a chord length  350  extends there between. The root of the airfoil corresponds to the lowest non-dimensional Z value of scalable TABLE 1. The tip of the airfoil corresponds to the highest non-dimensional Z value of scalable TABLE 1. 
     An airfoil may extend beyond the compressor flowpath and may be tipped to achieve the desired endwall clearances. As non-limiting examples only, the height of the airfoil  200  may be from about 1 inch to about 30 inches or more, about 5 inches to about 20 inches, about 5 inches to about 15 inches, or about 10 inches to about 15 inches. However, any specific airfoil height may be used as desired in the specific application. As will be appreciated, longer airfoils  200  may be used in the initial stages, while airfoils of progressively shorter lengths may be used in the subsequent stages. 
     The compressor flow path  1  requires airfoils that meet system requirements of aerodynamic and mechanical blade/vane loading and efficiency. For example, it is desirable that the airfoils are designed to reduce the vibratory response or vibratory stress response of the respective blades and/or vanes. Materials such as high strength alloys, non-corrosive alloys and/or stainless steels may be used in the blades and/or vanes. 
     To define the airfoil shape of each blade airfoil and/or vane airfoil, there is a unique set or loci of points in space that meet the stage requirements and that can be manufactured. These unique loci of points meet the requirements for stage efficiency and are arrived at by iteration between aerodynamic and mechanical loadings, thus enabling the turbine and compressor to run in an efficient, safe, reliable and smooth manner. These points are unique and specific to the system. The loci that define the airfoil profile include a set of points with X, Y, and Z coordinates relative to a reference origin coordinate system. 
     The three-dimensional Cartesian coordinate system of X, Y, and Z values given in scalable TABLE 1 below defines the profile of the stator vane airfoil at various locations along its length. Scalable TABLE 1 provides data for a non-coated airfoil. The envelope/tolerance for the coordinates is about +/−5% of the chord length  350  in a direction normal to any airfoil surface location, or about +/−0.25 inches in a direction normal to any airfoil surface location. However, tolerances of about +/−0.15 inches to about +/−0.25 inches, or about +/−3% to about +/−5% in a direction normal to an airfoil surface location may also be used, as desired in the specific application. 
     The point data origin  230  may be the mid-point of the suction side of the base of the airfoil, the pressure side of the base of the airfoil, the leading edge of the base of the airfoil, the trailing edge of the base of the airfoil, or any other suitable location as desired. The coordinate values for the X, Y, and Z coordinates are set forth in non-dimensionalized units in scalable TABLE 1, although other units of dimensions may be used when the values are appropriately converted. As one example only, the Cartesian coordinate values of X, Y, and Z may be convertible to dimensional distances by multiplying the X, Y, and Z values by a multiplying by a constant number (e.g., 100). The number, used to convert the non-dimensional values to dimensional distances, may be a fraction (e.g., ½, ¼, etc.), decimal fraction (e.g., 0.5, 1.5, 10.25, etc.), integer (e.g., 1, 2, 10, 100, etc.) or a mixed number (e.g., 1½, 10¼, etc.). The dimensional distances may be any suitable unit of measure (e.g., inches, feet, millimeters, centimeters, meters, etc.). As one non-limiting example only, the Cartesian coordinate system has orthogonally-related X, Y, and Z axes, in which the X axis may lie generally parallel to the compressor rotor centerline (i.e., the rotary axis) and a positive X coordinate value is axial toward the aft (i.e., exhaust end) of the turbine. The positive Y coordinate value extends tangentially in the direction of rotation of the rotor, and the positive Z coordinate value is radially outwardly toward the rotor blade tip, stator vane or stator vane base. All the values in scalable TABLE 1 are based on measurements at room temperature and are unfilleted. 
     By defining X and Y coordinate values at selected locations in a Z direction (or height) normal to the X, Y plane, the profile section or airfoil shape of the airfoil at each Z height along the length of the airfoil can be ascertained. By connecting the X and Y values with smooth continuing arcs, each profile section at each Z height is fixed. The airfoil profiles of the various surface locations between each Z height are determined by smoothly connecting the adjacent profile sections to one another to form the airfoil profile. 
     The TABLE 1 values are generated and shown from zero to four or more decimal places for determining the profile of the airfoil. As the airfoil heats up during use, the associated stress and temperature will cause a change in the X, Y, and Z values. Accordingly, the values for the profile given in TABLE 1 represent ambient, non-operating, or non-hot conditions (e.g., room temperature). As mentioned above, the values in TABLE 1 define a profile of an uncoated airfoil. 
     There are typical manufacturing tolerances as well as optional coatings which must be accounted for in the actual profile of the airfoil. Each section is joined smoothly with the other sections to form the complete airfoil shape. It will therefore be appreciated that +/−typical manufacturing tolerances, i.e., +/−values, including any coating thicknesses, are additive to the X and Y values given in TABLE 1 below. Accordingly, a distance of about +/−5% of chord length and/or +/−0.25 inches in a direction normal to a surface location along the airfoil profile defines an airfoil profile envelope for this particular airfoil design and compressor (i.e., a range of variation between measured points on the actual airfoil surface at nominal cold or room temperature and the ideal position of those points as given in TABLE 1 below at the same temperature). Additionally, a distance of about +/−5% of a chord length in a direction normal to an airfoil surface location along the airfoil profile also may define an airfoil profile envelope for this particular airfoil design. The data is scalable and the geometry pertains to all aerodynamic scales, at, above and/or below about 3,600 RPM. The stator vane airfoil design is robust to this range of variation without impairment of mechanical and aerodynamic functions. 
     The coordinate values given in scalable TABLE 1 below provide the nominal profile for an exemplary stage compressor stator vane. 
     
       
         
           
               
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 SUCTION SIDE 
                 PRESSURE SIDE 
               
            
           
           
               
               
               
               
               
               
            
               
                 X 
                 Y 
                 Z 
                 X 
                 Y 
                 Z 
               
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 −1.2257 
                 1.0575 
                 0 
                 1.6634 
                 −0.9911 
                 0 
               
               
                 −1.2296 
                 1.0533 
                 0 
                 1.6636 
                 −0.9904 
                 0 
               
               
                 −1.2337 
                 1.0468 
                 0 
                 1.6641 
                 −0.9891 
                 0 
               
               
                 −1.2371 
                 1.0379 
                 0 
                 1.6649 
                 −0.9863 
                 0 
               
               
                 −1.239 
                 1.0266 
                 0 
                 1.6657 
                 −0.9807 
                 0 
               
               
                 −1.2389 
                 1.0114 
                 0 
                 1.6651 
                 −0.9719 
                 0 
               
               
                 −1.2356 
                 0.9919 
                 0 
                 1.6581 
                 −0.9576 
                 0 
               
               
                 −1.2285 
                 0.9685 
                 0 
                 1.6404 
                 −0.9458 
                 0 
               
               
                 −1.2173 
                 0.941 
                 0 
                 1.6148 
                 −0.933 
                 0 
               
               
                 −1.2027 
                 0.9088 
                 0 
                 1.5828 
                 −0.9168 
                 0 
               
               
                 −1.1845 
                 0.8717 
                 0 
                 1.5415 
                 −0.8954 
                 0 
               
               
                 −1.1615 
                 0.8287 
                 0 
                 1.4944 
                 −0.8697 
                 0 
               
               
                 −1.1334 
                 0.78 
                 0 
                 1.4449 
                 −0.8408 
                 0 
               
               
                 −1.0996 
                 0.7261 
                 0 
                 1.3901 
                 −0.807 
                 0 
               
               
                 −1.0602 
                 0.6668 
                 0 
                 1.3298 
                 −0.7685 
                 0 
               
               
                 −1.0146 
                 0.6024 
                 0 
                 1.264 
                 −0.7254 
                 0 
               
               
                 −0.9627 
                 0.5336 
                 0 
                 1.196 
                 −0.6793 
                 0 
               
               
                 −0.9069 
                 0.4635 
                 0 
                 1.1257 
                 −0.6302 
                 0 
               
               
                 −0.8471 
                 0.3923 
                 0 
                 1.053 
                 −0.5781 
                 0 
               
               
                 −0.783 
                 0.3201 
                 0 
                 0.9781 
                 −0.5231 
                 0 
               
               
                 −0.7146 
                 0.247 
                 0 
                 0.9008 
                 −0.4652 
                 0 
               
               
                 −0.6418 
                 0.1731 
                 0 
                 0.8212 
                 −0.4044 
                 0 
               
               
                 −0.5642 
                 0.0988 
                 0 
                 0.7392 
                 −0.3408 
                 0 
               
               
                 −0.4819 
                 0.024 
                 0 
                 0.6548 
                 −0.2746 
                 0 
               
               
                 −0.3975 
                 −0.0486 
                 0 
                 0.5707 
                 −0.2079 
                 0 
               
               
                 −0.3109 
                 −0.119 
                 0 
                 0.4868 
                 −0.1411 
                 0 
               
               
                 −0.2219 
                 −0.187 
                 0 
                 0.403 
                 −0.0741 
                 0 
               
               
                 −0.1305 
                 −0.2524 
                 0 
                 0.319 
                 −0.0073 
                 0 
               
               
                 −0.0373 
                 −0.3147 
                 0 
                 0.2348 
                 0.0592 
                 0 
               
               
                 0.0575 
                 −0.3735 
                 0 
                 0.15 
                 0.125 
                 0 
               
               
                 0.1537 
                 −0.4292 
                 0 
                 0.0648 
                 0.1902 
                 0 
               
               
                 0.2512 
                 −0.4821 
                 0 
                 −0.0207 
                 0.255 
                 0 
               
               
                 0.35 
                 −0.5324 
                 0 
                 −0.1064 
                 0.3196 
                 0 
               
               
                 0.4498 
                 −0.5803 
                 0 
                 −0.1922 
                 0.384 
                 0 
               
               
                 0.5507 
                 −0.626 
                 0 
                 −0.2781 
                 0.4483 
                 0 
               
               
                 0.6492 
                 −0.6682 
                 0 
                 −0.3611 
                 0.5105 
                 0 
               
               
                 0.7451 
                 −0.7071 
                 0 
                 −0.4412 
                 0.5705 
                 0 
               
               
                 0.8383 
                 −0.7432 
                 0 
                 −0.5186 
                 0.6282 
                 0 
               
               
                 0.9287 
                 −0.7766 
                 0 
                 −0.5933 
                 0.6837 
                 0 
               
               
                 1.016 
                 −0.8077 
                 0 
                 −0.6651 
                 0.7369 
                 0 
               
               
                 1.1003 
                 −0.8366 
                 0 
                 −0.7343 
                 0.7877 
                 0 
               
               
                 1.1814 
                 −0.8638 
                 0 
                 −0.8009 
                 0.836 
                 0 
               
               
                 1.2591 
                 −0.8893 
                 0 
                 −0.8621 
                 0.8795 
                 0 
               
               
                 1.33 
                 −0.9119 
                 0 
                 −0.918 
                 0.9182 
                 0 
               
               
                 1.3938 
                 −0.9321 
                 0 
                 −0.9684 
                 0.9522 
                 0 
               
               
                 1.4504 
                 −0.9504 
                 0 
                 −1.0135 
                 0.9812 
                 0 
               
               
                 1.5033 
                 −0.9682 
                 0 
                 −1.0532 
                 1.0055 
                 0 
               
               
                 1.549 
                 −0.984 
                 0 
                 −1.0872 
                 1.0252 
                 0 
               
               
                 1.5841 
                 −0.9962 
                 0 
                 −1.1167 
                 1.0414 
                 0 
               
               
                 1.6122 
                 −1.0059 
                 0 
                 −1.142 
                 1.0539 
                 0 
               
               
                 1.6337 
                 −1.0114 
                 0 
                 −1.1636 
                 1.0623 
                 0 
               
               
                 1.65 
                 −1.0067 
                 0 
                 −1.1816 
                 1.0667 
                 0 
               
               
                 1.6573 
                 −1.0007 
                 0 
                 −1.1959 
                 1.0678 
                 0 
               
               
                 1.661 
                 −0.9959 
                 0 
                 −1.2066 
                 1.0667 
                 0 
               
               
                 1.6624 
                 −0.9932 
                 0 
                 −1.2151 
                 1.0642 
                 0 
               
               
                 1.6631 
                 −0.9918 
                 0 
                 −1.2215 
                 1.0608 
                 0 
               
               
                 −1.21 
                 1.0383 
                 0.765 
                 1.6386 
                 −0.9778 
                 0.765 
               
               
                 −1.2137 
                 1.0341 
                 0.765 
                 1.6389 
                 −0.9772 
                 0.765 
               
               
                 −1.2176 
                 1.0277 
                 0.765 
                 1.6393 
                 −0.9758 
                 0.765 
               
               
                 −1.2206 
                 1.0189 
                 0.765 
                 1.6401 
                 −0.9731 
                 0.765 
               
               
                 −1.2221 
                 1.0078 
                 0.765 
                 1.6408 
                 −0.9676 
                 0.765 
               
               
                 −1.2215 
                 0.993 
                 0.765 
                 1.64 
                 −0.9589 
                 0.765 
               
               
                 −1.2177 
                 0.974 
                 0.765 
                 1.6324 
                 −0.9452 
                 0.765 
               
               
                 −1.2102 
                 0.9513 
                 0.765 
                 1.6144 
                 −0.9343 
                 0.765 
               
               
                 −1.1988 
                 0.9247 
                 0.765 
                 1.5892 
                 −0.9216 
                 0.765 
               
               
                 −1.184 
                 0.8934 
                 0.765 
                 1.5578 
                 −0.9057 
                 0.765 
               
               
                 −1.1656 
                 0.8574 
                 0.765 
                 1.517 
                 −0.8846 
                 0.765 
               
               
                 −1.1425 
                 0.8157 
                 0.765 
                 1.4706 
                 −0.8593 
                 0.765 
               
               
                 −1.1143 
                 0.7685 
                 0.765 
                 1.4218 
                 −0.831 
                 0.765 
               
               
                 −1.0807 
                 0.7162 
                 0.765 
                 1.3677 
                 −0.7979 
                 0.765 
               
               
                 −1.0415 
                 0.6586 
                 0.765 
                 1.3082 
                 −0.7602 
                 0.765 
               
               
                 −0.9963 
                 0.5962 
                 0.765 
                 1.2433 
                 −0.7179 
                 0.765 
               
               
                 −0.9449 
                 0.5294 
                 0.765 
                 1.1761 
                 −0.6727 
                 0.765 
               
               
                 −0.8898 
                 0.4613 
                 0.765 
                 1.1067 
                 −0.6246 
                 0.765 
               
               
                 −0.8307 
                 0.392 
                 0.765 
                 1.0349 
                 −0.5736 
                 0.765 
               
               
                 −0.7676 
                 0.3217 
                 0.765 
                 0.9609 
                 −0.5198 
                 0.765 
               
               
                 −0.7003 
                 0.2506 
                 0.765 
                 0.8845 
                 −0.463 
                 0.765 
               
               
                 −0.6287 
                 0.1787 
                 0.765 
                 0.8059 
                 −0.4035 
                 0.765 
               
               
                 −0.5527 
                 0.1063 
                 0.765 
                 0.7249 
                 −0.3413 
                 0.765 
               
               
                 −0.4721 
                 0.0335 
                 0.765 
                 0.6415 
                 −0.2764 
                 0.765 
               
               
                 −0.3896 
                 −0.0373 
                 0.765 
                 0.5584 
                 −0.2111 
                 0.765 
               
               
                 −0.3049 
                 −0.1059 
                 0.765 
                 0.4755 
                 −0.1456 
                 0.765 
               
               
                 −0.2182 
                 −0.1722 
                 0.765 
                 0.3926 
                 −0.08 
                 0.765 
               
               
                 −0.1292 
                 −0.2361 
                 0.765 
                 0.3097 
                 −0.0144 
                 0.765 
               
               
                 −0.0379 
                 −0.2975 
                 0.765 
                 0.2266 
                 0.0508 
                 0.765 
               
               
                 0.0552 
                 −0.3558 
                 0.765 
                 0.143 
                 0.1154 
                 0.765 
               
               
                 0.1499 
                 −0.4112 
                 0.765 
                 0.059 
                 0.1795 
                 0.765 
               
               
                 0.2461 
                 −0.464 
                 0.765 
                 −0.0253 
                 0.2432 
                 0.765 
               
               
                 0.3436 
                 −0.5143 
                 0.765 
                 −0.1097 
                 0.3067 
                 0.765 
               
               
                 0.4424 
                 −0.5624 
                 0.765 
                 −0.1943 
                 0.3701 
                 0.765 
               
               
                 0.5423 
                 −0.6084 
                 0.765 
                 −0.2789 
                 0.4334 
                 0.765 
               
               
                 0.6397 
                 −0.6508 
                 0.765 
                 −0.3606 
                 0.4947 
                 0.765 
               
               
                 0.7345 
                 −0.69 
                 0.765 
                 −0.4395 
                 0.5539 
                 0.765 
               
               
                 0.8266 
                 −0.7263 
                 0.765 
                 −0.5156 
                 0.6108 
                 0.765 
               
               
                 0.9157 
                 −0.7599 
                 0.765 
                 −0.589 
                 0.6656 
                 0.765 
               
               
                 1.0019 
                 −0.7913 
                 0.765 
                 −0.6597 
                 0.7181 
                 0.765 
               
               
                 1.0848 
                 −0.8204 
                 0.765 
                 −0.7277 
                 0.7683 
                 0.765 
               
               
                 1.1646 
                 −0.8478 
                 0.765 
                 −0.7932 
                 0.816 
                 0.765 
               
               
                 1.2411 
                 −0.8734 
                 0.765 
                 −0.8533 
                 0.8591 
                 0.765 
               
               
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     It will also be appreciated that the airfoil  200  disclosed in the above scalable TABLE 1 may be non-scaled, scaled up, or scaled down geometrically for use in other similar turbine/compressor designs. Consequently, the coordinate values set forth in TABLE 1 may be non-scaled, scaled upwardly, or scaled downwardly such that the general airfoil profile shape remains unchanged. A scaled version of the coordinates in TABLE 1 would be represented by X, Y, and Z coordinate values of TABLE 1, with the X, Y, and Z non-dimensional coordinate values converted to inches or mm (or any suitable dimensional system), and then multiplied or divided by a constant number. The constant number may be a fraction, decimal fraction, integer or mixed number. 
     The article of manufacture may also have a suction-side nominal airfoil profile substantially in accordance with suction-side Cartesian coordinate values of X, Y, and Z set forth in the scalable table identified herein as TABLE 1. The Cartesian coordinate values of X, circumferentially Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number. The X and Y coordinates, when connected by smooth continuing arcs, define airfoil profile sections at each Z height. The airfoil profile sections at each Z height are joined smoothly with one another to form a complete suction-side airfoil shape. The X, Y, and Z coordinate values are scalable as a function of a number to provide a non-scaled, scaled-up, or scaled-down airfoil profile. 
     The article of manufacture may also have a pressure-side nominal airfoil profile substantially in accordance with pressure-side Cartesian coordinate values of X, Y, and Z set forth in the scalable identified herein as TABLE 1. The Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number. X and Y are coordinates which, when connected by smooth continuing arcs, define airfoil profile sections at each Z height. The airfoil profile sections at each Z height are joined smoothly with one another to form a complete pressure-side airfoil shape. The X, Y, and Z values are scalable as a function of the number to provide at least one of a non-scaled, scaled-up, and scaled-down airfoil. 
     The article of manufacture may be an airfoil or a stator vane configured for use with a compressor. The suction-side airfoil shape may lie in an envelope within +/−5% of a chord length in a direction normal to a suction-side airfoil surface location, or +/−0.25 inches in a direction normal to a suction-side airfoil surface location. 
     The number, used to convert the non-dimensional values to dimensional distances, may be a fraction, decimal fraction, integer, or mixed number. The height of the article of manufacture may be about 1 inch to about 30 inches, or any suitable height as desired in the specific application. 
     A compressor  2 , according to an aspect of the present disclosure, may include a plurality of stator vanes  23 . Each of the stator vanes  23  includes an airfoil  200  having a suction-side  310  airfoil shape, the airfoil  200  having a nominal profile substantially in accordance with suction-side  310  Cartesian coordinate values of X, Y, and Z set forth in a scalable table identified herein as TABLE 1. The Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number. The number, used to convert the non-dimensional values to dimensional distances, may be a fraction, decimal fraction, integer, or mixed number. X and Y are coordinates which, when connected by smooth continuing arcs, define airfoil profile sections at each Z height. The airfoil profile sections at each Z height are joined smoothly with one another to form a complete suction-side  310  airfoil shape. 
     The compressor  2 , according to an aspect of the present disclosure, may also have a plurality of stator vanes  23  having a pressure-side  320  nominal airfoil profile substantially in accordance with pressure-side Cartesian coordinate values of X, Y, and Z set forth in scalable TABLE 1. The Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y, and Z by a number. The number (which would be the same number used for the suction side) may be a fraction, decimal fraction, integer, or mixed number. X and Y are coordinates which, when connected by smooth continuing arcs, define airfoil profile sections at each Z height, the airfoil profile sections at each Z height being joined smoothly with one another to form a complete pressure-side airfoil shape. 
     An important term in this disclosure is profile. The profile is the range of the variation between measured points on an airfoil surface and the ideal position listed in scalable TABLE 1. The actual profile on a manufactured blade or vane may be different than those in scalable TABLE 1, and the design is robust to this variation (“robust” meaning that mechanical and aerodynamic function is not impaired). As noted above, an approximately + or −5% chord and/or 0.25 inch profile tolerance is used herein. The X, Y, and Z values are all non-dimensionalized. 
     The following are non-limiting examples of the airfoil profiles embodied by the present disclosure. On some compressors, each airfoil profile section (e.g., at each Z height) may be connected by substantially smooth continuing arcs. On other compressors, some of the airfoil profile sections may be connected by substantially smooth continuing arcs. Embodiments of the present disclosure may also be employed by a compressor having stage(s) with no airfoil profile sections connected by substantially smooth continuing arcs. 
     The disclosed airfoil shape increases reliability and is specific to the machine conditions and specifications. The airfoil shape provides a unique profile to achieve (1) interaction between other stages in the compressor; (2) aerodynamic efficiency; and (3) normalized aerodynamic and mechanical blade or vane loadings. The disclosed loci of points allow the gas turbine and compressor or any other suitable turbine/compressor to run in an efficient, safe, and smooth manner. As also noted, any scale of the disclosed airfoil may be adopted as long as (1) interaction between other stages in the compressor; (2) aerodynamic efficiency; and (3) normalized aerodynamic and mechanical blade loadings are maintained in the scaled compressor. 
     The airfoil  200  described herein thus improves overall compressor  2  efficiency. Specifically, the airfoil  200  provides the desired turbine/compressor efficiency lapse rate (ISO, hot, cold, part-load, etc.). The airfoil  200  also meets all requirements for aeromechanics, loading, and stress. 
     It should be understood that the finished article of manufacture, blade, or vane does not necessarily include all the sections defined in the one or more tables listed above. The portion of the airfoil proximal to a platform (or dovetail) and/or tip may not be defined by an airfoil profile section. It should be considered that the airfoil proximal to the platform or tip may vary due to several imposed constraints. The airfoil contains a main profile section that is substantially defined between the inner and outer flowpath walls. The remaining sections of the airfoil may be partly, at least partly, or completely located outside of the flowpath. At least some of these remaining sections may be employed to improve the curve fitting of the airfoil at its radially inner or outer portions. The skilled reader will appreciate that a suitable fillet radius may be applied between the platform and the airfoil portion of the article of manufacture, blade, or vane. 
     This written description uses examples to disclose the presently claimed subject matter, including the best mode, and also to enable any person skilled in the art to practice the claimed subject matter, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the disclosure is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.