Visualization device and observation method for flow field

Patent metadata

Field	Value
Publication number	US-11320449-B2
Application number	US-201916701073-A
Country	US
Kind code	B2
Filing date	Dec 2, 2019
Priority date	Nov 1, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A visualization device for a flow field includes a chamber, a power supply, at least one pair of electrodes, and at least one flow field observation module. The flow field observation module includes a high-speed camera, a light detecting component, and a light filter component. The power supply outputs a voltage to generate a plasma, and the pair of electrodes is disposed in the chamber. The flow field observation module is disposed outside the chamber and captures an image of a fluid particle excited by the plasma toward the chamber. The light filter component is disposed between the high-speed camera and the chamber. The light detecting component obtains a light information within the chamber and sends the light information to the light filter component.

First claim

What is claimed is:

1. A visualization device for a flow field, comprising:
a chamber;
a power supply outputting a voltage to generate a plasma;
at least one pair of electrodes disposed in the chamber, wherein the at least one pair of electrodes excites a fluid in the chamber via the voltage from the power supply to generate the plasma; and
at least one flow field observation module disposed outside the chamber and capturing an image of a fluid particle excited by the plasma toward the chamber, the flow field observation module comprising:
a high-speed camera;
a light filter component disposed between the high-speed camera and the chamber; and
a light detecting component obtaining a light information within the chamber and sending the light information to the light filter component.

2. The visualization device for the flow field of claim 1 , further comprising a vacuum equipment for maintaining a vacuum state in the chamber.

3. The visualization device for the flow field of claim 1 , wherein the fluid comprises an inert gas.

4. The visualization device for the flow field of claim 1 , wherein the high-speed camera captures the image of the fluid particle excited by the plasma toward the chamber via at least one of the light filter component and a wave filter component.

5. The visualization device for the flow field of claim 1 , wherein the light filter component comprises a plurality of light filter units.

6. The visualization device for the flow field of claim 5 , wherein the flow field observation module selects one of the light filter units in the light filter component according to a light intensity information in the light information in the chamber obtained by the light detecting component, such that the high-speed camera captures the image of the fluid particle excited by the plasma toward the chamber via the selected light filter unit.

7. The visualization device for the flow field of claim 5 , wherein the flow field observation module further comprises a wave filter component disposed between the high-speed camera and the chamber; the wave filter component comprises a plurality of wave filter units; and the flow field observation module selects one of the wave filter units in the wave filter component according to a light wavelength information in the light information in the chamber obtained by the light detecting component, such that the high-speed camera captures the image of the fluid particle excited by the plasma toward the chamber via the selected wave filter unit.

8. The visualization device for the flow field of claim 7 , wherein the light filter component comprises a first carrier, and the plurality of light filter units are disposed on the first carrier; and the wave filter component comprises a second carrier, and the plurality of wave filter units are disposed on the second carrier.

9. The visualization device for the flow field of claim 8 , wherein the first carrier has a first axis of rotation, and the first carrier is rotated according to the first axis of rotation such that one of the light filter units and one of the wave filter units are overlapped.

10. The visualization device for the flow field of claim 8 , wherein the second carrier has a second axis of rotation, and the second carrier is rotated according to the second axis of rotation such that one of the wave filter units and one of the light filter units are overlapped.

11. The visualization device for the flow field of claim 8 , wherein the first carrier and the second carrier have a common axis of rotation, and the first carrier and the second carrier are rotated according to the common axis of rotation such that one of the light filter units and one of the wave filter units are overlapped.

12. The visualization device for the flow field of claim 8 , wherein the first carrier and the second carrier are relatively translatable such that one of the light filter units and one of the wave filter units are overlapped.

13. An observation method for a flow field, comprising:
generating a plasma using a plasma generator disposed in a chamber, wherein the plasma generator comprises at least one pair of electrodes;
disposing at least one flow field observation module outside the chamber, wherein the flow field observation module comprises a high-speed camera, a light detecting component, and a light filter component, and the light detecting component and the light filter component are disposed between the high-speed camera and the chamber;
obtaining a light information in the chamber using the light detecting component of the flow field observation module and sending the light information to the light filter component; and
capturing an image of a fluid particle excited by the plasma toward the chamber via the light filter component using the high-speed camera of the flow field observation module.

14. The observation method for the flow field of claim 13 , further comprising, before the plasma is generated, introducing a fluid into the chamber, wherein the fluid comprises an inert gas.

15. The observation method for the flow field of claim 13 , further comprising, before the plasma is generated, vacuuming the chamber.

16. The observation method for the flow field of claim 13 , wherein the light filter component comprises a plurality of light filter units.

17. The observation method for the flow field of claim 16 , further comprising, after a light intensity information in the light information in the chamber is obtained and before the image of the fluid particle excited by the plasma is captured, selecting one of the light filter units of the light filter component according to the light intensity information such that the high-speed camera captures the image of the fluid particle excited by the plasma toward the chamber via the selected light filter unit.

18. The observation method for the flow field of claim 16 , wherein the flow field observation module further comprises a wave filter component disposed between the high-speed camera and the chamber, and the wave filter component comprises a plurality of wave filter units; and further comprising, after a light wavelength information in the light information in the chamber is obtained and before the image of the fluid particle excited by the plasma is captured, selecting one of the wave filter units of the wave filter component according to the light wavelength information such that the high-speed camera captures the image of the fluid particle excited by the plasma toward the chamber via the selected wave filter unit.

19. The observation method for the flow field of claim 18 , wherein the light filter component comprises a first carrier and a plurality of light filter units, and the plurality of light filter units are disposed on the first carrier and each of the light filter units contains a light filter; the wave filter component comprises a second carrier and a plurality of wave filter units, and the plurality of wave filter units are disposed on the second carrier and each of the wave filter units contains a wave filter, wherein the first carrier and the second carrier have a common axis of rotation; and further comprising, before the image of the fluid particle excited by the plasma is captured: rotating the first carrier and the second carrier according to the common axis of rotation such that one of the light filter units and one of the wave filter units are overlapped.

20. The observation method for the flow field of claim 18 , wherein the light filter component comprises a first carri

Assignees

• Ind Tech Res Inst

Inventors

• Huang Chih-Yung
• Liu Yao-Hsien
• Chen Kuan-Chou
• Lin Yi-Jiun
• Lin Shih-Chin
• Wang Ching-Chiun

Classifications

• G01P5/001 Primary

  Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation · CPC title

• G01P13/0006 Primary

  of fluids or of granulous or powder-like substances · CPC title

• G01M10/00 Primary

  Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels · CPC title

• G01T5/02

  Processing of tracks; Analysis of tracks · CPC title