# Presentation: 388522

## Nozzle Test : Measurement of Water Jet Movement

**Nozzle Test : Measurement of Water Jet Movement**

***12/12/2005 by HeeJin, Park ***

**Goal : To measure velocity and distortion of water jet with different nozzle**
**            ****and Evaluate.**

_**Plan**_

| No. | Condition | Atmospheric | Vacuum |
| --- | --- | --- | --- |
| 1 | Orifice Nozzle (Steel) | Done |  |
| 2 | Tapered Nozzle (Steel) | Done |  |
| 3 | Straight Nozzle (Steel) | Done | Done |
| 4 | Tapered Nozzle with Straight (Bronze) | Done | Done |
| 5 | Tapered Nozzle with Straight (Steel) | Done |  |

## Experimental Sketch  (11/16/05 version)

## Experimental Setup  (11/16/05 version)

**Experimental Setup  (11/16/05 version)**

_**Front view**_

_**Right view**_

_**Left view**_

## Nozzle Configuration

**1)**

**2)**

**3)**

**4)**

**5)**

## Measuring Environments 

_**High Speed Camera Setting**_

_**Measuring Position**_

| Frame Rate(fps) | 2500 |
| --- | --- |
| Exposure Time(μs) | 200 |
| Resolution | 1280×200 |

|   | Distance from Nozzle |  |
| --- | --- | --- |
|  | in | cm |
| Front | 4 | 10 |
| Middle | 15 | 37.5 |
| Rear | 23 | 57.5 |
| Total Travel of Jet | 27 | 67.5 |

## Measuring Technique

_**Example : Tapered Nozzle with Straight (atmospheric)**_

_**Velocity = Distance×FPS**_

**Nozzle Exit**

**Jet Moving Direction**

**Observing Point **

## Overall View

_**Front**_

_**Middle**_

_**Rear**_

_**Example : Tapered Steel Nozzle with Straight **_

**Break up**

**Dispersed**

**Laminar Flow**

**Dispersed at Surface**

**Wave, but no dispersed**

## Overall View

_**Continuous Captured Frame Image Example : Tapered Steel Nozzle with Straight **_

**Nozzle**

**Water Jet Flow **

## Result

|   | Tapered Bronze Nozzle w/ Straight (atmospheric) |  |  | Tapered Bronze Nozzle w/ Straight (vacuum) |  |  |
| --- | --- | --- | --- | --- | --- | --- |
|  | Front | Center | Rear | Front | Center | Rear |
| Distance(in)/Frame | 0.22 | 0.2 | 0.2 | 0.25 | 0.25 | 0.25 |
| Distance(m)/Frame | 0.0055 | 0.005 | 0.005 | 0.00625 | 0.00625 | 0.00625 |
| Time(s)/Frame | 0.0004 | 0.0004 | 0.0004 | 0.0004 | 0.0004 | 0.0004 |
| Velocity(m/s) | 13.75 | 12.5 | 12.5 | 15.625 | 15.625 | 15.625 |
| Distortion Ratio | 0.769 | 1.154 | 0.769 | 1.000 | 1.154 | 0.769 |

**Breakup Line**

## Result

|   | Tapered Steel Nozzle w/ Straight (atmospheric) |  |  |
| --- | --- | --- | --- |
|  | Front | Center | Rear |
| Distance(in)/Frame | 0.18 | 0.17 | 0.16 |
| Distance(m)/Frame | 0.0045 | 0.00425 | 0.004 |
| Time(s)/Frame | 0.0004 | 0.0004 | 0.0004 |
| Velocity(m/s) | 11.25 | 10.625 | 10 |
| Distortion Ratio | 1.286 | 1.286 | 0.571 |

|   | Tapered Steel Nozzle (atmospheric) |  |  |
| --- | --- | --- | --- |
|  | Front | Center | Rear |
| Distance(in)/Frame | 0.2 | 0.18 | 0.18 |
| Distance(m)/Frame | 0.005 | 0.0045 | 0.0045 |
| Time(s)/Frame | 0.0004 | 0.0004 | 0.0004 |
| Velocity(m/s) | 12.5 | 11.25 | 11.25 |
| Distortion Ratio | 2.500 | 3.000 | 3.000 |

|   | Orifice Nozzle (atmospheric) |  |  |
| --- | --- | --- | --- |
|  | Front | Center | Rear |
| Distance(in)/Frame | 0.2 | 0.18 | 0.18 |
| Distance(m)/Frame | 0.005 | 0.0045 | 0.0045 |
| Time(s)/Frame | 0.0004 | 0.0004 | 0.0004 |
| Velocity(m/s) | 12.5 | 11.25 | 11.25 |
| Distortion Ratio | 2.000 | 3.000 | 4.000 |

|   | Straight Steel Nozzle (atmospheric) |  |  | Straight Steel Nozzle (vacuum) |  |  |
| --- | --- | --- | --- | --- | --- | --- |
|  | Front | Center | Rear | Front | Center | Rear |
| Distance(in)/Frame | 0.2 | 0.2 | 0.2 | 0.25 | 0.25 | 0.25 |
| Distance(m)/Frame | 0.005 | 0.005 | 0.005 | 0.00625 | 0.00625 | 0.00625 |
| Time(s)/Frame | 0.0004 | 0.0004 | 0.0004 | 0.0004 | 0.0004 | 0.0004 |
| Velocity(m/s) | 12.5 | 12.5 | 12.5 | 15.625 | 15.625 | 15.625 |
| Distortion Ratio | 1.000 | 0.800 | 0.600 | 1.500 | 1.500 | 2.000 |

## Further Study : Magnetic Field Effect with Jet Angle

_**Pulsed Solenoid Magnetic Field (15T)**_

_**Transverse Magnetic Field along Hg Jet Axis**_

_**Distortion Ratio along Hg Jet Axis**_

_**Distortion ration w/o Surface Tension**_

_**Distortion ration w/ Surface Tension**_

## Further Study

_**Distortion Ratio of Hg Jet with Surface Tension**_

- Require initial distortion ratio of Hg jet ?
- Or Other way to approximate it ?

_**Mirror Mount Design for Optical Diagnostics**_

- Component :
- Window Clamper , Mirror Adjusting Mount
- Requirement :
- Focusing/Tilting of Reflecting Mirror (3 DOF)