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Area-adjustable particle scattering device and method for carrying out PIV test in wind tunnel

An adjustable particle technology, applied in the field of wind tunnel testing, can solve the problems of large cross-sectional area of ​​fixed sowing rake, non-adjustable particle sowing hole density and position, serious interference flow field, etc. Experimental efficiency, effect of large particle spreading area

Pending Publication Date: 2018-08-31
AVIC SHENYANG AERODYNAMICS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The cross-sectional area of ​​the fixed sowing rake is too large, but in the actual test, it is only necessary to sow particles in a specific area, and the resistance generated is large, so the structure is required to be stronger, the structure is bulky, and the interference with the flow field is more serious
[0005] 2. The fixed spreading rake is connected with the body of the wind tunnel by six tensioning wires. It is difficult to install the tensioning wires, the operation is inconvenient and time-consuming, and the fixed spreading rake shakes when the wind tunnel is running.
[0006] 3. The position of the sowing hole of the fixed sowing rake is fixed, and the density and position of the particle sowing hole cannot be adjusted
Difficult to control particle quality

Method used

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  • Area-adjustable particle scattering device and method for carrying out PIV test in wind tunnel
  • Area-adjustable particle scattering device and method for carrying out PIV test in wind tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: as figure 1 and figure 2 As shown, a kind of area-adjustable particle spreading device for carrying out PIV test in the wind tunnel of this embodiment,

[0041] Including the part of the movable spreading device, the fixed connection and the part of the air supply system;

[0042] The movable spreading device part includes a particle spreading tube 1, a particle spreading tube locking buckle 2, a movable pole 3, a movable pole locking nut 4 and a quick-insert soft connection 5;

[0043] The part of the fixed connection and air supply system includes a ventilation duct 6, a ventilation duct locking device 7, a particle spreading rake main frame 8, a wire tensioning system 9 and a particle spreading rake main frame connecting strut 10;

[0044] The air outlets of the same size are arranged at equal intervals on the particle spreading pipe 1, and the particles are sprayed along the airflow direction. The two ends of the particle spreading pipe 1 are equipp...

Embodiment 2

[0059] Embodiment 2: as figure 1 and figure 2 As shown, a kind of area adjustable particle spreading method for carrying out PIV test in wind tunnel of this embodiment, it relies on a kind of area adjustable type for carrying out PIV test in wind tunnel described in embodiment 1 The particle spreading device realizes, specifically:

[0060] First, install the movable pole 3 on the main frame 8 of the particle spreading rake, adjust the position of the left and right areas to be measured, and lock it with the movable pole lock nut 4;

[0061] Secondly, the particle spreading tube 1 is placed in the semicircular groove of the movable support rod 3, the position is selected according to the needs, and the locking buckle 2 of the particle spreading tube is clamped;

[0062] Third, connect the main frame 8 of the particle spreading rake and the particle spreading pipe 1 with the quick-plug soft connection 5;

[0063] Fourthly, connect the particle spreading rake main frame 8 an...

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PUM

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Abstract

The invention relates to an area-adjustable particle scattering device and method for carrying out a PIV test in a wind tunnel, and belongs to the technical field of wind tunnel tests. The device is technically characterized in that the device can be used for scattering particles in the wind tunnel, and a scattering rake can move up, down, left and right in the wind tunnel; by changing the position of a scattering pipe on the scattering rake, the scattering distances of the scattered particles are changed; the weight of the sprayed particles is changed by changing the air spraying pressure. Byadjusting a movable scattering device part, the particle scattering area and particle scattering density in a wind tunnel test are changed, the movable particle scattering device for providing traceparticles is provided for measurement of a specific area of a PIV, and PIV precise measurement of the specific area is ensured.

Description

technical field [0001] The invention relates to a particle spreading device and method for performing PIV tests in a wind tunnel, in particular to an area-adjustable particle spreading device and method for performing PIV tests in a wind tunnel, belonging to wind tunnel test technology field. Background technique [0002] During the development of aircraft, a large number of wind tunnel tests are required. It is very important to understand the data of aircraft under different Mach numbers. Among them, effective PIV tests in high-speed wind tunnels are very important for aircraft, especially special aircraft. PIV test has non-contact measurement, wide measurement area, can record velocity distribution information on a large number of spatial points in the same transient state, and can provide rich flow field spatial structure and flow characteristics. The advantages of high measurement accuracy. PIV measurement needs to disperse tracer particles to the flow field. The qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 张华明李玉军王猛王鹏
Owner AVIC SHENYANG AERODYNAMICS RES INST
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