CN110319997A - A kind of acoustic wind tunnel of variable-throat - Google Patents
A kind of acoustic wind tunnel of variable-throat Download PDFInfo
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- CN110319997A CN110319997A CN201810319878.XA CN201810319878A CN110319997A CN 110319997 A CN110319997 A CN 110319997A CN 201810319878 A CN201810319878 A CN 201810319878A CN 110319997 A CN110319997 A CN 110319997A
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- wind tunnel
- spout
- acoustic wind
- collection port
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Classifications
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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
- G01M9/02—Wind tunnels
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
A kind of acoustic wind tunnel of variable-throat is acoustic wind tunnel to be eliminated the noise to indoor spout and collection port is designed to detachable structure, and use different spout and collection port as needed, can obtain different flow field and sound field, expand the function of acoustic wind tunnel.Specifically include: the detachable collection port of fixed contraction section and the detachable spout of variation, fixed diffuser and variation, detachable bracket, bolt etc. install fastener.Acoustic wind tunnel as different spouts is in use, only need to install different spout and collection port and corresponding detachable bracket, so that it may the variable of spout is realized, to expand the function of acoustic wind tunnel.Facilitate etc. beneficial effects with functional, using easy, good economy performance and transformation.
Description
One, technical field
The present invention relates to a kind of designs of wind-tunnel, and in particular to a kind of design of acoustic wind tunnel.
Two, background technique
Wind-tunnel (wind tunnel) be can artificially generated and control air-flow, with simulated flight device or object ambient gas
Flowing, and air-flow can be measured to a kind of pipe-like experimental facilities of the effect of object and observation physical phenomenon, it is to carry out sky
Aerodynamic force tests the most frequently used, most effective tool.Wind tunnel experiment is an indispensable composition in aircraft development work
Part.It not only plays an important role in the research and development of aerospace engineering, with the hair of industrial aerodynamics
Exhibition, is even more indispensable in fields such as navigation, communications and transportation, building construction, wind energy utilizations.Acoustic wind tunnel (is also known as eliminated the noise
Wind-tunnel) it is for the special wind-tunnel facility of pneumatically-acoustic experiment, by reducing the ambient noise of test chamber, for pneumatic
Carry out acoustic experiment under environmental condition, Aerodynamic parameter and parameters,acoustic can be measured simultaneously.The basic pattern of acoustic wind tunnel
It is divided into two kinds of reverse-flow type (closed type) and single flow (open type).Wind-tunnel acoustic experiment is to carry out the research of aerodynamic noise mechanism of production
Important means, and the pneumatic noise reduction optimization design of verifying is most direct, effective method.Aeroacoustics test most important purpose
It is accurately to determine the region of aerodynamic noise source generation, and measure the sky of the frequency spectrum of sound and the intensity (such as sound pressure level) of sound
Between be distributed, provide technical support for noise control and noise reduction process.
Acoustic wind tunnel is the combination of pneumatic wind-tunnel and anechoic room from structure type, based on pneumatic wind-tunnel.Acoustics
Wind-tunnel has the characteristics that design difficulty is big, high construction cost, and function is relatively single, is mainly used for the examination of aeroacoustics
It tests, the dynamic (dynamical) experimental study of partial air can also be carried out.But needs are often only considered when the design of conventional acoustic wind-tunnel
Flow field and sound field characteristic, wherein the inducer of most critical and the shape of diffuser are unique, unmodifiable.If necessary to not
Same flow field and sound field then needs to redesign and build acoustic wind tunnel, and cost will be very high.Therefore, conventional sound
The design in style of study hole has certain limitation, and flow field and sound field have inalterability, limit the more of acoustic wind tunnel function
Sample.
The present invention is directed to this case, devises a kind of acoustic wind tunnel of variable-throat, and acoustic wind tunnel items is being kept to refer to
Mark requires, in the case where realizing acoustic wind tunnel original design flow field and sound field, it is only necessary to change the spout and collection port of wind-tunnel, energy
Different flow fields and sound field is obtained, the function of acoustic wind tunnel has been expanded, realizes higher input-output ratio.
Three, summary of the invention
For the function of expanding acoustic wind tunnel, the present invention devises a kind of acoustic wind tunnel of variable-throat, is mainly used for expanding
The function of acoustic wind tunnel, as shown in Figure 1.
The present invention solves technical solution used by the technical problem: acoustic wind tunnel is eliminated the noise indoor spout and collection
Oral area point is designed to Demountable, and uses different spout and collection port as needed, can obtain different flow fields
And sound field, expand the function of acoustic wind tunnel.It specifically includes: fixed contraction section and the detachable spout of variation, fixed
Diffuser and the detachable collection port of variation, detachable bracket, bolt etc. install fastener.Acoustics as different spouts
Wind-tunnel is in use, only need to install different spout and collection port and corresponding detachable bracket, so that it may realize spout
It is variable, to expand the function of acoustic wind tunnel.
The beneficial effects of the present invention are: (1) functional, extends the function of acoustic wind tunnel, allows to as difference
Acoustic wind tunnel use；(2) simplicity is used, the power and energy between different acoustic wind tunnels is simple and convenient；(3) good economy performance, only
It needs to do simple improvement on the basis of acoustic wind tunnel, can be achieved with different acoustic wind tunnel functions, improve acoustic wind tunnel
Benefit；(4) transformation is convenient, and existing acoustic wind tunnel only needs to eliminate the noise to it indoor spout and collection port is transformed, and increases
Different detachable spout and collection port is added to can be achieved with the extension of acoustic wind tunnel function, improvement cost is low.
Four, Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the acoustic wind tunnel schematic diagram of three kinds of different nozzle formations, and as shown in the figure is the test section part of acoustic wind tunnel,
Other parts are similar with other acoustic wind tunnels, can be designed completely by the form of acoustic wind tunnel, do not need to do particularly more
Change, is omitted here.Three kinds of nozzle formations have been respectively adopted in figure in (1) fixed contraction section in figure, (2) detachable spout,
(3) fixed diffuser, (4) detachable collection port, using collection port form corresponding from different nozzle formations, (5) wall
Body, (6) wedge absorber, (7) ground, (8) test specimen.
Fig. 2 is the acoustic wind tunnel design drawing of the first nozzle formations.(1) wedge absorber in figure, (2) acoustic board, (3) are fixed
Formula contraction section, (4) detachable spout, using the first nozzle formations, (5) detachable collection port is sprayed using with the first
The corresponding collection port form of degree of lip-rounding formula, (6) fixed diffuser, (7) diffuser and wind-tunnel other parts joint face, (8) are received
Contracting section connect bolt with spout, diffuser and collection port, the sound-absorbing material of (9) filling, (10) contraction section, diffuser and anechoic room
The device of gas leakage is prevented when connection, (11) anechoic room wall, (12) sound absorption door, (13) ground, (14) detachable spout support
Frame, (15) detachable collection port support frame, (16) wind tunnel body structure anechoic room exterior support frame, (17) air-conditioning duct,
(18) rane trolley, (19) noise absorption cover.
Fig. 3 is the acoustic wind tunnel design drawing of second of nozzle formations.(1) wedge absorber in figure, (2) acoustic board, (3) are fixed
Formula contraction section, (4) detachable spout, using second of nozzle formations, (5) detachable collection port is sprayed using with second
The corresponding collection port form of degree of lip-rounding formula, (6) fixed diffuser, (7) diffuser and wind-tunnel other parts joint face, (8) are received
Contracting section connect bolt with spout, diffuser and collection port, the sound-absorbing material of (9) filling, (10) contraction section, diffuser and anechoic room
The device of gas leakage is prevented when connection, (11) anechoic room wall, (12) sound absorption door, (13) ground, (14) detachable spout support
Frame, (15) detachable collection port support frame, (16) wind tunnel body structure anechoic room exterior support frame, (17) air-conditioning duct,
(18) rane trolley, (19) noise absorption cover.
Fig. 4 is the acoustic wind tunnel design drawing of the third nozzle formations.(1) wedge absorber in figure, (2) acoustic board, (3) are fixed
Formula contraction section, indoor spout of eliminating the noise are not installed, as the third nozzle formations, (5) detachable collection port, use and third
The corresponding collection port form of kind nozzle formations, (6) fixed diffuser, (7) diffuser and wind-tunnel other parts joint face,
(8) diffuser connect bolt with collection port, the sound-absorbing material of (9) filling, anti-when (10) contraction section, diffuser and anechoic room connect
The device of leak-stopping gas, (11) anechoic room wall, (12) sound absorption door, (13) ground, (15) detachable collection port support frame, (16)
Wind tunnel body structure anechoic room exterior support frame, (17) air-conditioning duct, (18) rane trolley, (19) noise absorption cover.
Five, specific embodiment
Embodiment
In the specific implementation form that Fig. 2~embodiment shown in Fig. 4 is the acoustic wind tunnel of variable-throat.Sound shown in Fig. 2
Style of study hole is generally designed according to conventional acoustic wind-tunnel, and new design has been done in the spout of wind-tunnel and collection port, design
Assembly is carried out respectively at detachable structure, and with the contraction section of wind-tunnel and diffuser, wherein wind-tunnel intake section are as follows: fixed receipts
Contracting section (3) and detachable spout (4) two-part combination；The indoor exit portion of wind-tunnel noise elimination is divided into: detachable receipts
Ji Kou (5) and fixed diffuser (6) two-part combination.If wind-tunnel there are also other diffusers, does not need to decompose.Though
The form of fixed section and detachable section two parts assembly is so used, but has no effect on the performance of acoustic wind tunnel normal function.
The decomposition of wind-tunnel entrance and exit part all uses and connects more firm bolt (8) connection type, and detachable section is all
It is supported using support frame (14) (15), the gas flow of wind-tunnel entrance and exit can be made continuously and undistorted, thus
It ensure that acoustic wind tunnel is capable of providing the flow field of high quality.
Acoustic wind tunnel shown in Fig. 2 is the state of the acoustic wind tunnel as the first nozzle formations.The first only need to be installed
The spout (4) and collection port (5) and their supporting support (14) (15) of form, can be achieved with the first nozzle formations acoustics
The function of wind-tunnel.Wherein the shape of spout (4) is quintic curve that shrinkage ratio is 2 in anechoic room, and collection port (5) is spread using half
The shape that angle is 2.93 °.
Acoustic wind tunnel shown in Fig. 3 is the state as the acoustic wind tunnel of second of nozzle formations.It is sprayed using second
Degree of lip-rounding formula need to only remove the spout (4) of the first form and collection port (5), install the spout (4) of second of form and collect
Mouthful (5) and their supporting support (14) (15), provide for different from the first nozzle formations acoustic wind tunnel flow field and
Sound field realizes the function of second of nozzle formations acoustic wind tunnel.Wherein the shape of spout (4) is cylinder in anechoic room, is collected
Mouth (5) uses bell shape.
Acoustic wind tunnel shown in Fig. 4 is the state of the acoustic wind tunnel as the third nozzle formations.It only need to be by Fig. 3 second
The spout (4) and its supporting support (14) of kind of form are removed, provide for being different from the first, second of nozzle formations acoustics wind
The flow field in hole and sound field realize the function of the third nozzle formations acoustic wind tunnel.Wherein collected in anechoic room without spout (4)
Mouth (5) uses bell shape.
In short, first routinely acoustic wind tunnel is designed, and the indoor wind-tunnel entrance and exit part that will eliminate the noise is resolved into
Fixed part and two sections of removable section.When the acoustic wind tunnel of different function characteristic is mutually converted, the original spray of wind-tunnel is first removed
Mouth and collection port and its bracket, then the new spout of wind-tunnel and collection port and its bracket are installed, after inspection ensures whole consolidate
It realizes different flow field and sound field, expands the function of acoustic wind tunnel.
Claims (3)
1. a kind of acoustic wind tunnel of variable-throat, be acoustic wind tunnel eliminated the noise to indoor spout and collection port be designed to it is detachable
Structure, and different spout and collection port are used as needed, different flow field and sound field can be obtained, acoustic wind tunnel has been expanded
Function.
2. the acoustic wind tunnel of a kind of variable-throat according to claim 1, it is characterized in that: by fixed contraction section and variation
Detachable spout, the installations fastening such as fixed diffuser and the detachable collection port of variation, detachable bracket, bolt
Part composition, the acoustic wind tunnel as different spouts is in use, only need to install different spout and collection port, and accordingly may be used
Detachable bracket, so that it may the variable of spout is realized, to expand the function of acoustic wind tunnel.
3. a kind of acoustic wind tunnel of variable-throat according to claim 1, it is characterized in that using three kinds of forms, the first shape
Formula are as follows: the shape of spout is the quintic curve that shrinkage ratio is 2, and collection port uses the half-angle of spread for 2.93 ° of shape；Second of shape
Formula are as follows: the shape of spout is cylinder, and collection port uses bell shape；The third form are as follows: without spout in anechoic room, receive
Ji Kou uses bell shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319878.XA CN110319997A (en) | 2018-03-29 | 2018-03-29 | A kind of acoustic wind tunnel of variable-throat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810319878.XA CN110319997A (en) | 2018-03-29 | 2018-03-29 | A kind of acoustic wind tunnel of variable-throat |
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| CN110319997A true CN110319997A (en) | 2019-10-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609243A (en) * | 2020-05-26 | 2020-09-01 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN111640412A (en) * | 2020-05-29 | 2020-09-08 | 扬州大学 | Air suction type direct-current low-speed wind tunnel noise reduction processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092203A (en) * | 2015-08-27 | 2015-11-25 | 北京航天长征飞行器研究所 | Wind tunnel diffuser compatible with multiple nozzles and wind tunnel diffusion method |
-
2018
- 2018-03-29 CN CN201810319878.XA patent/CN110319997A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092203A (en) * | 2015-08-27 | 2015-11-25 | 北京航天长征飞行器研究所 | Wind tunnel diffuser compatible with multiple nozzles and wind tunnel diffusion method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609243A (en) * | 2020-05-26 | 2020-09-01 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN111609243B (en) * | 2020-05-26 | 2022-04-05 | 北京绿创声学工程股份有限公司 | Manufacturing method of large equivalent diameter conical tandem type noise elimination channel |
| CN111640412A (en) * | 2020-05-29 | 2020-09-08 | 扬州大学 | Air suction type direct-current low-speed wind tunnel noise reduction processing method |
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Application publication date: 20191011 |