CN117433738A - Hypersonic wind tunnel - Google Patents
Hypersonic wind tunnel Download PDFInfo
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- CN117433738A CN117433738A CN202311735230.8A CN202311735230A CN117433738A CN 117433738 A CN117433738 A CN 117433738A CN 202311735230 A CN202311735230 A CN 202311735230A CN 117433738 A CN117433738 A CN 117433738A
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- 239000002245 particle Substances 0.000 claims abstract description 67
- 239000000428 dust Substances 0.000 claims abstract description 60
- 238000002474 experimental method Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 claims description 23
- 239000000700 radioactive tracer Substances 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000000917 particle-image velocimetry Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Abstract
The invention provides a hypersonic wind tunnel, comprising: the experimental section is provided with an experimental bin for carrying out experiments; the trace particle output section is communicated with the experiment section and is used for conveying trace particles into the experiment section for experiment; a vacuum section in communication with the experimental section and at least for generating a negative pressure within the experimental section; and the separation section is arranged between the vacuum section and the experimental section and used for separating dust particles output by the experimental section from entering the vacuum section. On the basis of the traditional hypersonic wind tunnel layout, the influence of trace particles or other impurity particles on downstream equipment is eliminated by installing a filter and an electrostatic dust removing device on an upstream pipeline of the vacuum tank, the phenomenon that a vacuum pump is blocked and blocked due to the fact that the trace particles or other impurity particles are accumulated in a large amount in the vacuum tank is avoided, the service life of the vacuum pump is prolonged, and the hypersonic wind tunnel is guaranteed to normally run.
Description
Technical Field
The invention relates to the technical field of hypersonic wind tunnels, in particular to a hypersonic wind tunnel.
Background
With the continuous development of computer science, computational fluid mechanics is greatly improved in computational capability to obtain rapid development, but for hypersonic flow, as the flow parameters are more and coupling relations exist among different parameters, the flow mechanism is very complex, and the size of a real aircraft is huge, so that large-scale and refined direct numerical simulation calculation of the real aircraft cannot be performed by using a computer at present. Therefore, hypersonic wind tunnels remain an indispensable means for studying hypersonic flow physical properties at present.
The hypersonic wind tunnel is used for researching aerodynamic problems, researchers are more concerned about the structure of the surface flow field of the aircraft, such as flow field speed field and density field measurement, besides traditional macroscopic aerodynamic physical quantities such as force measurement and heat measurement, and the like, and the fine measurement of the quantities can help the researchers to better know the surface flow mechanism of the aircraft, so that the macroscopic aerodynamic force/heat physical quantities of the aircraft are optimally designed. In recent years, with the continuous progress of hypersonic wind tunnel experimental technology, particle image velocimetry technology becomes an important means for measuring a speed field of a wind tunnel. For hypersonic wind tunnels, the use of particle image velocimetry techniques presents many challenges, such as how to recover the particles scattered upstream after passing through the experimental bin downstream of the tunnel. The particle image velocimetry technology generally uses nano-scale titanium dioxide particles as trace particles, if the trace particles enter a vacuum tank at the downstream of a wind tunnel without any treatment, trace particles in the vacuum tank enter the vacuum pump in the process of vacuumizing the vacuum pump, a small amount of trace particles possibly have less influence on the vacuum pump, but if more trace particles enter the vacuum pump along with the time, the phenomenon of blocking and jamming of the vacuum pump can be caused, and the normal operation of the wind tunnel is influenced. In addition, the vacuum pump often sucks in air with particles, which can aggravate the abrasion of the vacuum pump and seriously affect the service life of the vacuum pump. Therefore, aiming at the problem that the particle image velocimetry technology brings about that the tracer particles enter the vacuum tank, a new wind tunnel layout is designed, and the particles are recycled before the tracer particles enter the vacuum tank, so that the phenomenon that the tracer particles are accumulated in a large quantity in the vacuum tank is avoided.
Disclosure of Invention
The invention aims at least solving one of the technical problems that the prior art lacks treatment of trace particles which are output to the downstream of a wind tunnel after passing through an experimental bin, and the phenomenon that a vacuum pump is blocked and stuck easily occurs after a period of accumulation of the trace particles after the trace particles enter a vacuum tank, so that the normal operation of the wind tunnel is affected.
To this end, the invention provides a hypersonic wind tunnel.
The invention provides a hypersonic wind tunnel, comprising:
the experimental section is provided with an experimental bin for carrying out experiments;
the trace particle output section is communicated with the experiment section and is used for conveying trace particles into the experiment section for experiment;
a vacuum section in communication with the experimental section and at least for generating a negative pressure within the experimental section;
and the separation section is arranged between the vacuum section and the experimental section and used for separating dust particles output by the experimental section from entering the vacuum section.
According to the technical scheme, the hypersonic wind tunnel can also have the following additional technical characteristics:
in the above technical solution, the blocking section includes:
the electrostatic dust collection device is arranged on a communication path between the experimental section and the vacuum section and used for blocking at least part of dust particles output by the experimental section from entering the vacuum section.
In the above technical solution, the electrostatic dust collection device includes:
and the controller is used for controlling the opening and closing of the electrostatic dust collection device.
In the above technical solution, the vacuum section is provided with:
the dust concentration sensor is used for monitoring the dust concentration in the vacuum section, the dust concentration sensor is connected with the controller through signals, and the controller controls the on-off of the electrostatic dust collection device according to the signals transmitted by the dust concentration sensor.
In the above technical solution, the blocking section includes:
the filter device is arranged on the communication path between the experimental section and the vacuum section and used for blocking at least part of dust particles output by the experimental section from entering the vacuum section.
In the above technical solution, the filter device is provided with a replaceable filter element.
In the above technical solution, further includes:
and the diffusion section is arranged between the experimental section and the blocking section and is used for decelerating and pressurizing the incoming gas of the experimental section.
In the above technical solution, the blocking section includes:
and the filter device is arranged between the diffusion section and the vacuum section and is used for blocking at least part of dust particles output by the diffusion section from entering the vacuum section.
In the above technical solution, the blocking section further includes:
and the electrostatic dust collection device is arranged between the filter device and the vacuum section and is used for blocking at least part of dust particles output by the filter device from entering the vacuum section.
In any of the above embodiments, the dust particles comprise tracer particles and/or impurity particles.
In summary, due to the adoption of the technical characteristics, the invention has the beneficial effects that:
on the basis of the traditional hypersonic wind tunnel layout, the influence of trace particles or other impurity particles on downstream equipment is eliminated by installing a filter and an electrostatic dust removing device on an upstream pipeline of the vacuum tank, the phenomenon that a vacuum pump is blocked and blocked due to the fact that the trace particles or other impurity particles are accumulated in a large amount in the vacuum tank is avoided, the service life of the vacuum pump is prolonged, and the hypersonic wind tunnel is guaranteed to normally run.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic layout of a hypersonic wind tunnel in accordance with one embodiment of the present invention;
fig. 2 is a schematic layout of a hypersonic wind tunnel in the prior art.
The correspondence between the reference numerals and the component names in fig. 1 to 2 is:
1. an experiment section; 2. a vacuum section; 3. a trace particle output section; 4. a barrier section; 5. a diffuser section;
21. a dust concentration sensor;
41. a filter device; 42. an electrostatic dust collection device;
421. and a controller.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A hypersonic wind tunnel provided according to some embodiments of the present invention is described below with reference to fig. 1 to 2.
Some embodiments of the present application provide a hypersonic wind tunnel.
As shown in fig. 1, a first embodiment of the present invention proposes a hypersonic wind tunnel comprising an experimental section 1, a vacuum section 2, a trace particle output section 3 and a barrier section 4. The tracer particle output section 3 comprises a spray pipe, and after tracer particles are generated by upstream equipment of the tracer particle output section 3, the tracer particles are conveyed into the experimental section 1 through the spray pipe; the experiment section 1 is provided with an experiment bin for carrying out experiments, and experiments such as particle image velocimetry can be carried out in the experiment bin; the vacuum section 2 comprises a vacuum tank and a vacuum pump, the vacuum pump is communicated with the vacuum tank, the vacuum tank is communicated with the experiment section 1, after the vacuum pump is started, a negative pressure environment is formed in the experiment section 1 and a pipeline at the downstream of the experiment section 1, specifically, the experiment section 1 can be vacuumized according to experiment requirements, and thus, a vacuum environment is formed in an experiment bin. The separation section 4 is arranged between the vacuum section 2 and the experiment section 1, and the separation section 4 can comprise any one of the filter device 41 and the electrostatic dust collection device 42, and can also simultaneously comprise the filter device 41 and the electrostatic dust collection device 42, so long as dust particles output by the experiment section 1 can be prevented from entering the vacuum section 2.
Specifically, in one embodiment, the blocking section 4 includes an electrostatic dust removing device 42, where the electrostatic dust removing device 42 is disposed on a communication path between the experimental section 1 and the vacuum section 2, and is used for blocking at least part of dust particles output from the experimental section 1 from entering the vacuum section 2, and the electrostatic dust removing device 42 does not have to completely block the dust particles output from the experimental section 1, so long as the blocking effect can be achieved, and dust particles entering the vacuum section 2 are reduced.
Further, the electrostatic precipitator 42 includes a controller 421 for controlling the electrostatic precipitator 42 to be turned on or off, such as turning on or off the electrostatic precipitator 42 according to the wind tunnel operation time or turning on or off the electrostatic precipitator 42 according to the dust concentration in the vacuum tank, according to the requirement. In one embodiment, the vacuum section 2 is provided with a dust concentration sensor 21 for monitoring the dust concentration in the vacuum tank, the dust concentration sensor 21 is in signal connection with the controller 421, the signal connection mode can be either wired connection or wireless connection, and when the dust concentration in the vacuum tank is detected to exceed a set threshold value, the electrostatic dust collection device 42 is turned on to prevent dust particles from entering the vacuum tank.
In another embodiment, the blocking section 4 comprises a filter device 41, and the filter device 41 is arranged on the communication path between the experimental section 1 and the vacuum section 2 and is used for blocking at least part of dust particles output from the experimental section 1 from entering the vacuum section 2. In particular, the filter device 41 is provided with a replaceable filter cartridge.
The second embodiment of the invention provides a hypersonic wind tunnel, and on the basis of the first embodiment, as shown in fig. 1, the hypersonic wind tunnel further comprises a diffuser section 5, wherein the diffuser section 5 is arranged between the experimental section 1 and the blocking section 4 and is used for decelerating and pressurizing the incoming gas of the experimental section 1, so that the pressure recovery is realized, the outlet pressure of the diffuser section 5 can be far higher than the outlet pressure of an upstream spray pipe, the air exhaust cost of a vacuum system is greatly reduced, the running time of the wind tunnel is prolonged, and the running efficiency of the wind tunnel is improved.
In this embodiment, the barrier section 4 comprises a filter device 41 and an electrostatic precipitator device 42. A filter device 41 is arranged between the diffuser 5 and the vacuum section 2 for blocking at least part of the dust particles output via the diffuser 5 from entering the vacuum section 2. An electrostatic precipitator 42 is provided between the filter device 41 and the vacuum section 2 for blocking at least part of the dust particles output through the filter device 41 from entering the vacuum section 2.
Specifically, a filter device 41 with a replaceable filter element and an electrostatic dust collection device 42 are added between the diffuser 5 and the vacuum tank, and besides, a dust concentration sensor 21 is also installed in the vacuum tank, so that the dust concentration in the vacuum tank is monitored constantly, and a feedback circuit control system is formed. When the concentration of the upstream trace particles is small, the electrostatic dust collection device 42 is in a closed state, trace particles only pass through the filter device 41 and enter the vacuum tank, and the filter device 41 with the filter element capable of being replaced quickly is selected, so that the filter element can be replaced conveniently. The dust concentration sensor 21 is arranged in the vacuum tank to monitor the concentration of dust in the vacuum tank, when the concentration of upstream trace particles is high, the filter device 41 is insufficient for completely filtering and removing trace particles and other impurity particles, the controller 421 starts the electrostatic dust removal device 42 to actively collect and treat the particles blown from the upstream, so that the trace particles in the vacuum tank are ensured to enter as few as possible, and the vacuum pump is protected, so that the whole wind tunnel is in a clean running state.
In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hypersonic wind tunnel comprising:
the experimental section is provided with an experimental bin for carrying out experiments;
the trace particle output section is communicated with the experiment section and is used for conveying trace particles into the experiment section for experiment;
a vacuum section in communication with the experimental section and at least for generating a negative pressure within the experimental section;
and the separation section is arranged between the vacuum section and the experimental section and used for separating dust particles output by the experimental section from entering the vacuum section.
2. A hypersonic wind tunnel as claimed in claim 1 wherein the barrier section comprises:
the electrostatic dust collection device is arranged on a communication path between the experimental section and the vacuum section and used for blocking at least part of dust particles output by the experimental section from entering the vacuum section.
3. A hypersonic wind tunnel as claimed in claim 2, wherein the electrostatic precipitator means comprises:
and the controller is used for controlling the opening and closing of the electrostatic dust collection device.
4. A hypersonic wind tunnel as claimed in claim 3 wherein the vacuum section is provided with:
the dust concentration sensor is used for monitoring the dust concentration in the vacuum section, the dust concentration sensor is connected with the controller through signals, and the controller controls the on-off of the electrostatic dust collection device according to the signals transmitted by the dust concentration sensor.
5. A hypersonic wind tunnel as claimed in claim 1 wherein the barrier section comprises:
the filter device is arranged on the communication path between the experimental section and the vacuum section and used for blocking at least part of dust particles output by the experimental section from entering the vacuum section.
6. A hypersonic wind tunnel as claimed in claim 5 wherein the filter means is provided with a replaceable filter element.
7. A hypersonic wind tunnel as claimed in claim 1, further comprising:
and the diffusion section is arranged between the experimental section and the blocking section and is used for decelerating and pressurizing the incoming gas of the experimental section.
8. A hypersonic wind tunnel as claimed in claim 7 wherein the barrier section comprises:
and the filter device is arranged between the diffusion section and the vacuum section and is used for blocking at least part of dust particles output by the diffusion section from entering the vacuum section.
9. A hypersonic wind tunnel as claimed in claim 8 wherein the barrier section further comprises:
and the electrostatic dust collection device is arranged between the filter device and the vacuum section and is used for blocking at least part of dust particles output by the filter device from entering the vacuum section.
10. A hypersonic wind tunnel according to any of claims 1 to 9, characterized in that the dust particles comprise tracer particles and/or impurity particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311735230.8A CN117433738A (en) | 2023-12-18 | 2023-12-18 | Hypersonic wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311735230.8A CN117433738A (en) | 2023-12-18 | 2023-12-18 | Hypersonic wind tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117433738A true CN117433738A (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311735230.8A Pending CN117433738A (en) | 2023-12-18 | 2023-12-18 | Hypersonic wind tunnel |
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| Country | Link |
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| CN (1) | CN117433738A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435769A (en) * | 2011-11-21 | 2012-05-02 | 上海交通大学 | Method and device for spreading trace particles in supersonic PIV (Particle Image Velocimetry) flow field testing experiment |
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| CN207641031U (en) * | 2017-11-08 | 2018-07-24 | 固安鼎材科技有限公司 | A kind of purification sublimation apparatus |
| CN109374838A (en) * | 2018-11-26 | 2019-02-22 | 浙江海洋大学 | A kind of monitoring of hazardous gas method using radioactive tracer |
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| CN113226513A (en) * | 2018-10-24 | 2021-08-06 | 珀金埃尔默健康科学加拿大股份有限公司 | Particulate filter and system including the same |
| CN216573590U (en) * | 2021-11-23 | 2022-05-24 | 河源市柏尔科技有限公司 | Filter equipment of vacuum pump front stage |
| CN115555129A (en) * | 2022-09-21 | 2023-01-03 | 江苏微导纳米科技股份有限公司 | Dust collector and vacuum coating equipment |
| CN116086764A (en) * | 2022-12-13 | 2023-05-09 | 中国航天空气动力技术研究院 | High-speed wind tunnel boundary layer trace particle sowing pressure control device |
| CN117138486A (en) * | 2023-08-30 | 2023-12-01 | 南通市威士真空设备有限公司 | Roots oil-free vertical vacuum unit |
-
2023
- 2023-12-18 CN CN202311735230.8A patent/CN117433738A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435769A (en) * | 2011-11-21 | 2012-05-02 | 上海交通大学 | Method and device for spreading trace particles in supersonic PIV (Particle Image Velocimetry) flow field testing experiment |
| CN106017854A (en) * | 2016-07-14 | 2016-10-12 | 山东科技大学 | Dust environment simulation and measurement system |
| CN107091722A (en) * | 2017-04-20 | 2017-08-25 | 中国人民解放军国防科学技术大学 | A kind of Flow Field in Wind Tunnel observation system |
| CN207641031U (en) * | 2017-11-08 | 2018-07-24 | 固安鼎材科技有限公司 | A kind of purification sublimation apparatus |
| CN113226513A (en) * | 2018-10-24 | 2021-08-06 | 珀金埃尔默健康科学加拿大股份有限公司 | Particulate filter and system including the same |
| CN109374838A (en) * | 2018-11-26 | 2019-02-22 | 浙江海洋大学 | A kind of monitoring of hazardous gas method using radioactive tracer |
| CN109813519A (en) * | 2019-03-11 | 2019-05-28 | 中国人民解放军国防科技大学 | Supersonic wind tunnel tracing medium adding mechanism, wind tunnel test device and adding method |
| CN216573590U (en) * | 2021-11-23 | 2022-05-24 | 河源市柏尔科技有限公司 | Filter equipment of vacuum pump front stage |
| CN115555129A (en) * | 2022-09-21 | 2023-01-03 | 江苏微导纳米科技股份有限公司 | Dust collector and vacuum coating equipment |
| CN116086764A (en) * | 2022-12-13 | 2023-05-09 | 中国航天空气动力技术研究院 | High-speed wind tunnel boundary layer trace particle sowing pressure control device |
| CN117138486A (en) * | 2023-08-30 | 2023-12-01 | 南通市威士真空设备有限公司 | Roots oil-free vertical vacuum unit |
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