CN109632233A - A kind of microjet generation device for cavity - Google Patents
A kind of microjet generation device for cavity Download PDFInfo
- Publication number
- CN109632233A CN109632233A CN201811493815.2A CN201811493815A CN109632233A CN 109632233 A CN109632233 A CN 109632233A CN 201811493815 A CN201811493815 A CN 201811493815A CN 109632233 A CN109632233 A CN 109632233A
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- CN
- China
- Prior art keywords
- cavity
- flow regulating
- jet stream
- flow
- regulating barrels
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses components such as a kind of the microjet generation devices for cavity, including cavity, jet stream baffle, flow regulating barrels, air supply pipe, flow regulating barrels upper end is embedded in cavity leading edge incoming flow flat plate bottom, and jet stream baffle is located at cavity leading edge and is provided with jet hole；Jet stream baffle, flow regulating barrels and cavity are to be detachably connected, and the jet stream baffle and flow regulating barrels for replacing various configuration can produce various forms of microjets；Flow regulating barrels bottom is equipped with the air supply pipe connecting with external air source, for providing air-flow；Filled with sound absorption cotton in flow regulating barrels.Flow quality preferably microjet can be generated with the simple device of this kind of structure.The device has the advantages that structure is simple, reusable, reliability is preferable, replaceability is good and jet stream quality is excellent.Therefore, applicability is preferable, application easy to spread, has biggish applied value.
Description
Technical field
The invention belongs to aeroacoustics to test field, and in particular to a kind of microjet generation device for cavity, this dress
It sets for carrying out cavity active Flow Control and noise reduction effect verification test.
Background technique
Advanced fighter opens internal weapon bays in high-speed flight process, and internal weapon bays, which streams, inevitably will appear flow separation, cuts
Phenomena such as layer is unstable is cut, when meeting certain condition, there is also stream Induced Oscillation and operatic tunes resonance phenomenon, pressure fluctuation in cabin
Acutely, noise circumstance is severe, and noise sound is up to more than 170 decibels.In order to effectively inhibit strong cavity noise, both at home and abroad
The master carried out for cavity passively flows control research, by the noise for reducing cavity and then control and generating of flowing.
Jet generating device is mostly that mechanical or external drainage is direct in existing cavity microjet active Flow Control
Jet exit is injected, mechanical fluidic device extrudes gas from jet exit often by piston actuation, and outside drainage is then
It is that jet exit is directly connected by external air source to generate jet stream.Often there is more problem in both traditional injection devices.One
The effluxvelocity that the mechanical jet generating device of aspect generates often immobilizes or flow velocity is inadequate, it is difficult to adapt to different cavitys
Flowing control under extraneous current speed；On the other hand both fluidic devices can generate larger vibration and noise.
In order to solve the problems, such as that conventional fluidic device exists, better high-quality jet stream is generated to be controlled to Cavity Flow
System inhibits cavity noise.The present invention provides a kind of microjet generation device for cavity, this kind of fluidic device passes through outside
Bleed, the methods of pipeline sound absorption processing solve the problems, such as that conventional fluidic generation device exists.
Summary of the invention
Goal of the invention
In order to solve the problems, such as existing fluidic device there are flow velocity limitation and introduce larger vibration and noise, preferable product are generated
The purpose of matter jet stream, a kind of the present invention provides structures simple, the preferable cavity microjet generation device of reliability.
Inventive technique solution
In order to achieve the above-mentioned object of the invention, the present invention uses following technical solutions:
The components such as a kind of the microjet generation device for cavity, including cavity, jet stream baffle, flow regulating barrels, air supply pipe, it is whole
Flow cartridge upper end is embedded in cavity leading edge incoming flow flat plate bottom, and jet stream baffle is located at cavity leading edge and is provided with jet hole；It is jet stream baffle, whole
Flow cartridge is to be detachably connected with cavity, and the jet stream baffle and flow regulating barrels for replacing various configuration can produce various forms of micro- penetrate
Stream；Flow regulating barrels bottom is equipped with the air supply pipe connecting with external air source, for providing air-flow；Filled with sound absorption cotton in flow regulating barrels.It fills out
The sound absorption cotton filled can directly impact cavity leading edge incoming flow flat plate bottom to avoid air-flow, so that existing via the air-flow that air supply pipe introduces
It is uniformly distributed in flow regulating barrels, can additionally absorb ambient noise when air-flow enters flow regulating barrels from air supply pipe.
Preferably, cavity two sides fixed hole position is provided with to connect cavity with jet stream baffle by bolt.
Preferably, cavity and jet stream baffle contact position carry out air-tightness processing, it is ensured that air-flow can only be from jet stream baffle
Jet hole outflow.
Preferably, cavity is connected with flow regulating barrels by flow regulating barrels two sides fixed hole position.
Preferably, the sound absorption cotton disorder distribution filled in flow regulating barrels.
Advantages of the present invention
The present invention has the advantages that
Under prior art condition and experimental condition, it can generate that quality is preferably micro- to penetrate with the simple device of this kind of structure
Stream.Flow regulating barrels can not only reduce the ambient noise and impact noise of air-flow, and air-flow can also be made to be uniformly distributed.Replace tripe systems
The jet stream baffle and flow regulating barrels of type can produce various forms of microjets.The device has structure simple, reusable, reliable
The advantage that property is preferable, replaceability is good and jet stream quality is excellent.Therefore, applicability is preferable, application easy to spread, has biggish suitable
With value.
Detailed description of the invention
Fig. 1 is a kind of isometric test chart of microjet generation device for cavity of the invention.
Fig. 2 is a kind of front view of microjet generation device for cavity of the invention.
Fig. 3 is a kind of cross-sectional view of microjet generation device for cavity of the invention.
Fig. 4 is a kind of operation principle schematic diagram of microjet generation device for cavity of the invention.
Wherein, 1- cavity, 2- jet stream baffle, 3- flow regulating barrels, 4- air supply pipe, 5- cavity and flow regulating barrels fixed hole position, 6- are empty
Chamber and jet stream baffle fixed hole position.
Specific embodiment
In conjunction with summary of the invention general introduction and attached drawing, the specific embodiment that the present invention will be described in detail.
As shown in Figure 1, a kind of microjet generation device for cavity, including it is cavity 1, interchangeable jet stream baffle 2, whole
Flow cartridge 3 and the air supply pipe 4 being connect with external air source.Flow regulating barrels 3 are with inner cavity and top opening structure, 3 upper end of flow regulating barrels
It is embedded in 1 leading edge incoming flow flat plate bottom of cavity, jet stream baffle 2 is located at 1 leading edge of cavity and is provided with jet hole, jet stream baffle 2, flow regulating barrels
3 with cavity 1 be to be detachably connected, and the jet stream baffle 2 and flow regulating barrels 3 for replacing various configuration can produce various forms of micro- penetrate
Stream；3 bottom of flow regulating barrels is equipped with the air supply pipe 4 connecting with external air source, for providing air-flow.Cavity 1 and interchangeable jet stream gear
Plate 2 is attached by the fixed hole position 6 being arranged in 1 two sides of cavity with bolt, and cavity 1 has with 2 contact position of jet stream baffle
Air-tightness processing, it is ensured that air-flow can only be flowed out from the jet hole of jet stream baffle 2.Cavity 1 and flow regulating barrels 3 pass through at 3 liang of flow regulating barrels
The fixed hole position 5 of side setting is connected with, and since 3 upper end of flow regulating barrels is embedded in cavity leading edge bottom, leakproofness is fine.?
Entanglement filling sound absorption cotton in flow regulating barrels 3 enables by air supply pipe 4 into the gas in flow regulating barrels 3 under the action of absorbing sound cotton
It being uniformly distributed, is unlikely to directly to impact cavity 1, the another aspect effect for the cotton that absorbs sound is then the ambient noise that can absorb air-flow,
So that air-flow has preferable flow quality before the outflow of the jet hole of jet stream baffle, jet stream flow quality is reduced to the shadow of test
It rings.3 bottom of flow regulating barrels connects air supply pipe 4；The gas sources such as external high pressure air accumulator and compressor are connect with air supply pipe 4, air-flow via
Air supply pipe 4 enters in flow regulating barrels 3, and the inside of flow regulating barrels 3 is as shown in Figure 3.High quality jet stream is kept off by passing through after flow regulating barrels 3 by jet stream
Different jet exits enters cavity 1 on plate 2.
The preferable jet stream of quality can be generated using the device, the vibration of tradition machinery formula jet generating device is solved and make an uproar
The larger problem of sound, and all pass through encapsulation process since device is whole, only need external air source pressure sufficiently large, the device is suitable
Effluxvelocity range is larger.
Claims (5)
1. a kind of microjet generation device for cavity, it is characterised in that: including cavity (1), the insertion of flow regulating barrels (3) upper end is empty
Chamber (1) leading edge incoming flow flat plate bottom, jet stream baffle (2) are located at cavity (1) leading edge and are provided with jet hole；Jet stream baffle (2), rectification
Cylinder (3) and cavity (1) are to be detachably connected；Flow regulating barrels (3) bottom is equipped with the air supply pipe (4) connecting with external air source；Rectification
Filled with sound absorption cotton in cylinder (3).
2. a kind of microjet generation device for cavity as described in claim 1, it is characterised in that: in cavity (1) two sides
Fixed hole position (5) are provided with, are connect cavity (1) with jet stream baffle (2) by bolt.
3. a kind of microjet generation device for cavity as described in claim 1, it is characterised in that: cavity (1) and jet stream
Baffle (2) contact position carries out air-tightness processing, it is ensured that air-flow can only be flowed out from the jet hole of jet stream baffle.
4. a kind of microjet generation device for cavity as described in claim 1, it is characterised in that: cavity (1) and rectification
Cylinder (3) is connected with by flow regulating barrels (3) two sides fixed hole position.
5. a kind of microjet generation device for cavity as described in claim 1, it is characterised in that: in flow regulating barrels (3)
The sound absorption cotton disorder distribution of filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493815.2A CN109632233A (en) | 2018-12-07 | 2018-12-07 | A kind of microjet generation device for cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493815.2A CN109632233A (en) | 2018-12-07 | 2018-12-07 | A kind of microjet generation device for cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109632233A true CN109632233A (en) | 2019-04-16 |
Family
ID=66071625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811493815.2A Pending CN109632233A (en) | 2018-12-07 | 2018-12-07 | A kind of microjet generation device for cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109632233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985749A (en) * | 2021-05-12 | 2021-06-18 | 中国航空工业集团公司沈阳空气动力研究所 | Cavity noise suppression wind tunnel test device based on sound absorption material |
Citations (7)
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| JP2003261097A (en) * | 2002-03-11 | 2003-09-16 | Yamaha Motor Co Ltd | Sound insulating structure for pump chamber of water jet propulsion boat |
| CN201763691U (en) * | 2010-09-21 | 2011-03-16 | 浙江亿利达风机股份有限公司 | Rectifying cylinder structure of jet fan |
| CN202337358U (en) * | 2011-11-14 | 2012-07-18 | 中国航空工业集团公司沈阳空气动力研究所 | Noise suppression device of stationary micro jet weapon bay |
| CN106014741A (en) * | 2016-06-27 | 2016-10-12 | 北京工业大学 | Visual pore submerged jet impacting force testing device and method |
| CN106765834A (en) * | 2016-12-30 | 2017-05-31 | 东华大学 | A kind of low noise classroom air jet system |
| CN107269595A (en) * | 2017-07-20 | 2017-10-20 | 天津中隧通风机有限公司 | The muffler of jet blower |
| CN207946209U (en) * | 2018-02-05 | 2018-10-09 | 百林机电科技（苏州）有限公司 | A kind of low-speed jet device |
-
2018
- 2018-12-07 CN CN201811493815.2A patent/CN109632233A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003261097A (en) * | 2002-03-11 | 2003-09-16 | Yamaha Motor Co Ltd | Sound insulating structure for pump chamber of water jet propulsion boat |
| CN201763691U (en) * | 2010-09-21 | 2011-03-16 | 浙江亿利达风机股份有限公司 | Rectifying cylinder structure of jet fan |
| CN202337358U (en) * | 2011-11-14 | 2012-07-18 | 中国航空工业集团公司沈阳空气动力研究所 | Noise suppression device of stationary micro jet weapon bay |
| CN106014741A (en) * | 2016-06-27 | 2016-10-12 | 北京工业大学 | Visual pore submerged jet impacting force testing device and method |
| CN106765834A (en) * | 2016-12-30 | 2017-05-31 | 东华大学 | A kind of low noise classroom air jet system |
| CN107269595A (en) * | 2017-07-20 | 2017-10-20 | 天津中隧通风机有限公司 | The muffler of jet blower |
| CN207946209U (en) * | 2018-02-05 | 2018-10-09 | 百林机电科技（苏州）有限公司 | A kind of low-speed jet device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985749A (en) * | 2021-05-12 | 2021-06-18 | 中国航空工业集团公司沈阳空气动力研究所 | Cavity noise suppression wind tunnel test device based on sound absorption material |
| CN112985749B (en) * | 2021-05-12 | 2021-08-03 | 中国航空工业集团公司沈阳空气动力研究所 | Cavity noise suppression wind tunnel test device based on sound absorption material |
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Application publication date: 20190416 |