CN116086764A - High-speed wind tunnel boundary layer trace particle sowing pressure control device - Google Patents
High-speed wind tunnel boundary layer trace particle sowing pressure control device Download PDFInfo
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- CN116086764A CN116086764A CN202211595658.2A CN202211595658A CN116086764A CN 116086764 A CN116086764 A CN 116086764A CN 202211595658 A CN202211595658 A CN 202211595658A CN 116086764 A CN116086764 A CN 116086764A
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- wind tunnel
- boundary layer
- pipeline
- vacuum container
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
Abstract
The invention relates to the technical field of hydrodynamic tests, in particular to a high-speed wind tunnel boundary layer trace particle sowing pressure control device, which comprises a powder supply system and a vacuum control system, wherein the powder supply system comprises an air compressor, the air compressor is connected with a fluidization barrel through a pipeline, and the fluidization barrel is connected with a particle mixing tank through a pipeline; the vacuum control system comprises an adjustable vacuum container, the adjustable vacuum container is connected with a vacuum pump for adjusting the vacuum degree in the adjustable vacuum container through a pipeline, the particle mixing tank is connected with the adjustable vacuum container through a pipeline, a uniformly mixed trace particle flow with the vacuum degree in a specific range is formed in the adjustable vacuum container, and then the trace particle flow is sowed into a wind tunnel. The method can control the high-quality stable injection of the trace particles in the boundary layer, thereby improving the concentration of the trace particles in the boundary layer and realizing the fine measurement of the velocity field in the hypersonic wind tunnel boundary layer.
Description
Technical Field
The invention relates to the technical field of hydrodynamic tests, in particular to a high-speed wind tunnel boundary layer tracer particle sowing pressure control device.
Background
The velocity field measurement of hypersonic velocity flow field always adopts a tracer particle velocity measurement method, a certain concentration of tracer particles are required to be scattered in the flow field, and the movement condition of the flow field is calculated by tracking the movement of the tracer particles through a camera. At present, the speed field measurement precision of the main stream can meet the test requirement, but the flow field measurement in the boundary layer is always a difficult point of the test.
Therefore, the main flow is used for sowing trace particles in the boundary layer, and meanwhile, the trace particles are also sown in the boundary layer, and the static pressure in the conventional hypersonic wind tunnel is low, so that the pressure of the trace particles entering the pressure control device in the boundary layer is controlled to be very stable, the pressure cannot be too high, otherwise, the velocity of the trace particles entering the boundary layer is too high to form jet flow, the velocity distribution of the wind tunnel flow field can be influenced, the velocity profile of the wind tunnel flow field cannot be correspondingly matched, and the error of velocity field measurement is increased, so that a high-speed wind tunnel trace particle sowing pressure control device is needed by a person skilled in the art.
Disclosure of Invention
The invention aims to provide a high-speed wind tunnel boundary layer tracer particle sowing pressure control device which can realize stable sowing of tracer particles in boundary layers and provide data support for development of high-speed aircrafts.
The invention provides a high-speed wind tunnel boundary layer trace particle sowing pressure control device, which comprises a powder supply system and a vacuum control system, wherein the powder supply system comprises an air compressor, the air compressor is connected with a fluidization barrel through a pipeline, and the fluidization barrel is connected with a particle mixing tank through a pipeline; the vacuum control system comprises an adjustable vacuum container, the adjustable vacuum container is connected with a vacuum pump for adjusting the vacuum degree in the adjustable vacuum container through a pipeline, the particle mixing tank is connected with the adjustable vacuum container through a pipeline, a uniformly mixed trace particle flow with the vacuum degree in a specific range is formed in the adjustable vacuum container, and then the trace particle flow is sowed into a wind tunnel.
Further, the air compressor is directly connected with the particle mixing tank through a pipeline as a bypass, and flow control valves are respectively arranged on the air compressor and the pipeline between the fluidization barrel and the particle mixing tank.
Further, an air filter with the precision of 1 μm is arranged on a pipeline between the particle mixing tank and the adjustable vacuum container.
Further, a gas-solid separation filter is arranged on a pipeline between the adjustable vacuum container and the vacuum pump.
Further, a diaphragm valve is also arranged on the pipeline between the adjustable vacuum container and the vacuum pump.
Further, the adjustable vacuum container is connected with a high vacuum fine tuning valve for fine tuning the pressure of the adjustable vacuum container.
Further, the fluidization barrel is made of transparent materials.
Further, the pressure of the air compressor is greater than 0.7Mpa.
Further, the vacuum pump and the high-vacuum fine tuning valve act on the adjustable vacuum container to generate control pressure with the pressure of P1, P1 satisfies P < P1 < 5P, and P is the static pressure of the wind tunnel.
Further, the pressure of the wind tunnel is less than 3000Pa.
The beneficial effects are that:
according to the invention, through the cooperative adjustment of the powder supply system and the vacuum control system, a uniformly mixed trace particle stream with a specific range of vacuum degree is formed, and then the trace particle stream is scattered into a wind tunnel, so that the high-quality stable injection of trace particles in the boundary layer can be controlled, the concentration of trace particles in the boundary layer is improved, and the fine measurement of the velocity field in the boundary layer of the hypersonic wind tunnel is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a powder feeding system according to the present invention;
FIG. 2 is a schematic diagram of a vacuum control system according to the present invention;
FIG. 3 is a schematic diagram of the overall connection relationship of the device of the present invention.
Reference numerals illustrate: 1-powder supply system, 2-vacuum control system, 3-wind tunnel, 4-air compressor, 5-flow control valve, 6-fluidization barrel, 7-particle mixing tank, 8-vacuum pump, 901-air filter, 902-gas-solid separation filter, 10-diaphragm valve, 11-adjustable vacuum container, 12-high vacuum fine tuning valve.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The high-speed wind tunnel boundary layer trace particle sowing pressure control device comprises a powder supply system 1 and a vacuum control system 2, wherein the powder supply system 1 comprises an air compressor 4, the air compressor 4 is connected with a fluidization barrel 6 through a pipeline, and the fluidization barrel 6 is connected with a particle mixing tank 7 through a pipeline; the vacuum control system 2 comprises an adjustable vacuum container 11, wherein the adjustable vacuum container 11 is connected with a vacuum pump 8 for adjusting the internal vacuum degree of the adjustable vacuum container through a pipeline, and a gas-solid separation filter 902 is arranged on the pipeline between the adjustable vacuum container 11 and the vacuum pump 8, so that trace particles can not enter the vacuum pump and damage the vacuum pump when the vacuum pump 8 pumps vacuum; a diaphragm valve 10 is also arranged on the pipeline between the adjustable vacuum container 11 and the vacuum pump 8; the particle mixing tank 7 is connected with the adjustable vacuum container 11 through a pipeline, and an air filter 901 with the precision of 1 mu m is arranged on the pipeline between the particle mixing tank 7 and the adjustable vacuum container 11, so that the diameter of trace particles entering the adjustable vacuum container 11 is ensured to be not more than 1 mu m; the adjustable vacuum container 11 is connected with a high vacuum fine tuning valve 12 for carrying out pressure fine tuning on the adjustable vacuum container, so that the accuracy of pressure control is further improved, a well-mixed trace particle stream with a specific range of vacuum degree is formed in the adjustable vacuum container 11, and then the trace particle stream is scattered into the wind tunnel 3.
The air compressor 4 is directly connected with the particle mixing tank 7 through a pipeline serving as a bypass, and flow control valves 5 are arranged on the pipelines between the air compressor 4 and the fluidization barrel 6 and between the air compressor 4 and the particle mixing tank 7 respectively; the fluidization barrel 6 is made of transparent materials, so that the quantity of internal particles can be conveniently observed, and an antistatic hose is used for an outlet pipeline of the particle mixing tank 7, so that the trace particles are prevented from agglomerating and adhering. The pressure of the air compressor 4 is more than 0.7Mpa. The vacuum pump 8 and the high vacuum fine tuning valve 12 act on the adjustable vacuum container to generate control pressure with the pressure of P1, P1 satisfies P < P1 < 5P, and P is the static pressure of the wind tunnel. The pressure of the wind tunnel is less than 3000Pa.
The working and using processes are as follows:
the air compressor 4 generates compressed air, the flow control valve 5 is connected through a PVC pipeline, the flow control valve 5 is regulated to control the flow entering the fluidization barrel 6, trace particles are arranged in the fluidization barrel 6, under the action of the compressed air, the trace particles are pressed into the particle mixing tank 7 and then enter a vacuum control system through the mixing transition of the particle mixing tank 7, the vacuum pump 8 is used for regulating the vacuum degree in the adjustable vacuum container 11, the high-vacuum fine-tuning valve 12 carries out pressure fine tuning on the adjustable vacuum container 11, and the trace particles are ensured to enter the adjustable vacuum container 11 to have the diameter not more than 1 mu m after passing through the air filter 901 with the precision of 1 mu m; by the cooperative adjustment of the two systems, a well mixed tracer particle stream with a specific range of vacuum is formed, which is then sown into the wind tunnel 3.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The high-speed wind tunnel boundary layer trace particle sowing pressure control device is characterized by comprising a powder supply system and a vacuum control system, wherein the powder supply system comprises an air compressor, the air compressor is connected with a fluidization barrel through a pipeline, and the fluidization barrel is connected with a particle mixing tank through a pipeline; the vacuum control system comprises an adjustable vacuum container, the adjustable vacuum container is connected with a vacuum pump for adjusting the vacuum degree in the adjustable vacuum container through a pipeline, the particle mixing tank is connected with the adjustable vacuum container through a pipeline, a uniformly mixed trace particle flow with the vacuum degree in a specific range is formed in the adjustable vacuum container, and then the trace particle flow is sowed into a wind tunnel.
2. The high-speed wind tunnel boundary layer trace particle sowing pressure control device according to claim 1, wherein the air compressor is directly connected with the particle mixing tank through a pipeline as a bypass, and flow control valves are arranged on the pipelines between the air compressor and the fluidization barrel and the particle mixing tank respectively.
3. The high-speed wind tunnel boundary layer trace particle broadcasting pressure control device according to claim 2, wherein an air filter with the precision of 1 μm is arranged on a pipeline between the particle mixing tank and the adjustable vacuum container.
4. The high-speed wind tunnel boundary layer trace particle sowing pressure control device according to claim 2, wherein a gas-solid separation filter is arranged on a pipeline between the adjustable vacuum container and the vacuum pump.
5. The high-speed wind tunnel boundary layer trace particle broadcasting pressure control device according to claim 4, wherein a diaphragm valve is further arranged on a pipeline between the adjustable vacuum container and the vacuum pump.
6. The high-speed wind tunnel boundary layer trace particle sowing pressure control device according to claim 2, wherein the adjustable vacuum container is connected with a high-vacuum fine-tuning valve for carrying out pressure fine tuning on the adjustable vacuum container.
7. The high-speed wind tunnel boundary layer tracer particle broadcasting pressure control device according to claim 1, wherein the fluidization bucket is made of transparent materials.
8. The high-speed wind tunnel boundary layer trace particle broadcasting pressure control device according to claim 1, wherein the air compressor pressure is greater than 0.7Mpa.
9. The high-speed wind tunnel boundary layer trace particle broadcasting pressure control device according to claim 6, wherein the vacuum pump and the high-vacuum fine tuning valve act on the adjustable vacuum container to generate control pressure with the pressure value of P1, P1 satisfies P < P1 < 5P, and P is the static pressure of the wind tunnel.
10. The high-speed wind tunnel boundary layer tracer particle broadcasting pressure control device according to claim 2, wherein the pressure of the wind tunnel is less than 3000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211595658.2A CN116086764A (en) | 2022-12-13 | 2022-12-13 | High-speed wind tunnel boundary layer trace particle sowing pressure control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211595658.2A CN116086764A (en) | 2022-12-13 | 2022-12-13 | High-speed wind tunnel boundary layer trace particle sowing pressure control device |
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| CN116086764A true CN116086764A (en) | 2023-05-09 |
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| CN202211595658.2A Pending CN116086764A (en) | 2022-12-13 | 2022-12-13 | High-speed wind tunnel boundary layer trace particle sowing pressure control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433738A (en) * | 2023-12-18 | 2024-01-23 | 中国空气动力研究与发展中心计算空气动力研究所 | Hypersonic wind tunnel |
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2022
- 2022-12-13 CN CN202211595658.2A patent/CN116086764A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433738A (en) * | 2023-12-18 | 2024-01-23 | 中国空气动力研究与发展中心计算空气动力研究所 | Hypersonic wind tunnel |
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