CN206847900U - A kind of atmospheric boundary layer wind tunnel - Google Patents
A kind of atmospheric boundary layer wind tunnel Download PDFInfo
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- CN206847900U CN206847900U CN201720677287.0U CN201720677287U CN206847900U CN 206847900 U CN206847900 U CN 206847900U CN 201720677287 U CN201720677287 U CN 201720677287U CN 206847900 U CN206847900 U CN 206847900U
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- wind tunnel
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- boundary layer
- diffuser
- atmospheric boundary
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Abstract
The utility model discloses a kind of atmospheric boundary layer wind tunnel, including wind tunnel noumenon and the backflow road for being arranged on wind tunnel noumenon top；The wind tunnel noumenon includes fan section, big angle of release diffuser, stable section, contraction section, test section and diffuser successively from air inlet to air outlet；At least one layer of anti-separation net is provided with the big angle of release diffuser；Stable section is at least provided with one layer of damping screen；The utility model eliminates honeycomb, shortens the entire length of wind-tunnel, has saved construction area, and its economy is improved so as to reduce investment outlay.
Description
Technical field
It the utility model is related to wind tunnel test field, and in particular to a kind of atmospheric boundary layer wind tunnel.
Background technology
With the development of the architecture structure forms such as long-span roof, high-rise building, large span and super-long span bridges, in order to
Meet the design of these buildings and build needs, there is provided reliable wind- tunnel investigation means, accurate simulation structural detail construction
Influence, guarantee test accuracy, it is necessary to build the super-huge the PBL wind for these architecture structure form experimental studies
Hole；Current existing super-huge atmospheric boundary layer wind tunnel, honeycomb can be typically provided between its internal contraction section and test section,
Its floor space is big, involves great expense.
Utility model content
The utility model provide it is a kind of can shorten wind-tunnel length without the super-huge atmospheric boundary layer wind tunnel of honeycomb.
The technical solution adopted in the utility model is：A kind of atmospheric boundary layer wind tunnel, including wind tunnel noumenon and it is arranged on wind
The backflow road of hole body upper part；The wind tunnel noumenon includes fan section, big angle of release diffuser, steady successively from air inlet to air outlet
Determine section, contraction section, test section and diffuser；At least one layer of anti-separation net is provided with the big angle of release diffuser；Stable section is extremely
One layer of damping screen is provided with less.
Further, the air inlet is provided with the first flow deflector, and air outlet position is provided with the second flow deflector.
Further, the air inlet position is additionally provided with First Transition section.
Further, it is provided with the second changeover portion between the fan section and big angle of release diffuser.
Further, the big angle of release diffuser is provided with two layers of anti-separation net, and three layers of damping screen are provided with stable section.
Further, the big angle of release diffuser diffusion full-shape is 32 °.
Further, the wind tunnel noumenon is long tubular structure.
Further, the upper and lower wall diffusion full-shape of the diffuser is 8.69 °.
Further, the test section inner roof wall expands fixed angle of flare as 0.22 °.
The beneficial effects of the utility model are：
(1) the utility model eliminates honeycomb, shortens the entire length of wind-tunnel；
(2) the utility model reduces its overall facade structures, and 300 flat above building sides are saved compared with traditional wind-tunnel
Product, has saved investment；
(3) the utility model improves the economy of wind-tunnel, simple in construction, easy for construction.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is that mean wind speed changes measured curve in the utility model embodiment 1.
Fig. 3 is that flow field velocity is distributed CFD analog result schematic diagrames after big angle of release diffuser adds damping screen.
In figure：The flow deflectors of 1- first, 2- First Transition sections, 3- fan sections, the changeover portions of 4- second, the big angle of release diffusers of 5-,
6- stable sections, 7- contraction sections, 8- test sections, 9- diffusers, the flow deflectors of 10- second, 11- backflows road.
Embodiment
The utility model is described further with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of atmospheric boundary layer wind tunnel, including wind tunnel noumenon and the backflow road for being arranged on wind tunnel noumenon top
11；The wind tunnel noumenon from air inlet to air outlet successively include fan section 3, big angle of release diffuser 5, stable section 6, contraction section 7,
Test section 8 and diffuser 9；At least one layer of damping screen is provided with the big angle of release diffuser 5；Stable section 6 is at least provided with one
Layer anti-separation net；Set damping screen to reduce incoming turbulivity, prevent flow separation, ensure the purpose of direction of flow.
Further, the air inlet is provided with the first flow deflector 1, and air outlet position is provided with the second flow deflector 10, led
Flow is that one kind prevents air from producing vortex in sharp turn and causing air-flow not smooth, off-energy, produces the zero of the disadvantages such as noise
Part.
Further, the air inlet position is additionally provided with First Transition section 2, sets changeover portion 2 to be because fan section 3 is
Circular cross section, air inlet are rectangular cross section.
Further, the second changeover portion 4 is provided between the fan section 3 and big angle of release diffuser 5, sets changeover portion to be
Because fan section 3 is circular cross section, big angle of release diffuser 5 is rectangular cross section.
Further, the big angle of release diffuser 5 is provided with two layers of anti-separation net, and three layers of damping are provided with stable section 6
Net, damping screen effect are stable disorderly irregular air-flows, split big whirlpool, the vortex in air-flow of decaying, improve airflow direction and speed
The uniformity of degree.By numerical simulation analysis, 5 layers of damping screen can meet requirement of the specification for Flow Field in Wind Tunnel.
Further, it is 32 ° that the big angle of release diffuser 5, which spreads full-shape,.
Further, the wind tunnel noumenon is long tubular structure.
Further, 5 upper and lower wall of the diffuser diffusion full-shape is 8.69 °, and diffuser 5 is 22.11m.
Further, the inner roof wall of test section 8 expands fixed angle of flare as 0.22 °；The section of test section 8 be 22.5m it is wide,
4.5m high, 36.0m length.
It is 27.8m that big angle of release diffuser 5, stable section 6 and hand, which shorten 7 total lengths,；In use, wind is set through air inlet position
The first flow deflector 1, successively by fan section 3, First Transition section 2, fan section 3, the second changeover portion 4, big angle of release diffuser 5,
Stable section 6, contraction section 7, test section 8 and diffuser 9；Then the second flow deflector 10 set through air outlet position, into thereon
The backflow road 11 in portion；The backflow total length of road 11 reaches 120m.
Embodiment
Using said apparatus, carry out uniform flow field measurement under 10.4m/s wind speed, data acquisition respectively in wind-tunnel not
Carried out with position, its sample frequency is 256Hz, time 40s；Wind Velocity History measurement is completed by one-dimensional hot-wire anemometer,
Collection point is highly respectively 1.05m and 0.45m；Test result is as shown in Fig. 2 mean wind speed rate of change is less than in empty wind-tunnel
1.5%, wind speed is uniform and stable, and flow field quality disclosure satisfy that various test requirements documents；Wind-tunnel dynamic pressure field coefficient μ≤2%, air-flow drift angle
≤ 0.5, dynamic pressure stability Δ q/q≤1%, turbulence level ε≤1%, static pressure gradient along tunnel axisMeet domestic specification
It is required that.
The influence to test section flow field quality of backflow road 11, wind-tunnel gateway air-flow to above-mentioned wind-tunnel, test section flow field
And big angle of flare, the effect of anti-division damping screen using CFX softwares calculate and carried out preferably profile；From Fig. 3
It can clearly find out that some local detachments occurs in the 3rd small diffuser both ends air-flow of big angle of release diffuser 5, but by 2~
After 3 damping screens, air-flow is gradually uniform；In terms of above result of calculation, the utility model design aerodynamic arrangement be it is successful, it is complete
Design requirement can be met entirely.
The fairing that honeycomb and damping screen are belonged in wind-tunnel layout, there is similar rectified action, traditional wind-tunnel
Layout arranges honeycomb and damping screen in stable section, is not provided with damping screen in big diffuser, the utility model passes through in big angle of release
Diffuser 5 installs three layers of anti-separation net, and stable section 6 installs two layers of damping screen, eliminates the setting of honeycomb, equally reached biography
The pneumatic requirement for wind-tunnel layout of uniting；And the entire length of wind-tunnel is shortened, is saved in the facade arrangement of traditional wind-tunnel honeycomb
Construction areas more than 300 square meters has been saved, has saved 3,000,000 investments, the economy of wind-tunnel has been significantly improved, in super-huge air
It has been applied successfully in boundary layer wind tunnel construction, promotional value is big.
Claims (9)
- A kind of 1. atmospheric boundary layer wind tunnel, it is characterised in that：Including wind tunnel noumenon and the backflow road for being arranged on wind tunnel noumenon top (11)；The wind tunnel noumenon from air inlet to air outlet successively include fan section (3), big angle of release diffuser (5), stable section (6), Contraction section (7), test section (8) and diffuser (9)；At least one layer of anti-separation net is provided with the big angle of release diffuser (5)；Surely Section (6) is determined at least provided with one layer of damping screen.
- A kind of 2. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The air inlet is provided with first and led Flow (1), air outlet position are provided with the second flow deflector (10).
- A kind of 3. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The air inlet position is additionally provided with First Transition section (2).
- A kind of 4. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The fan section (3) and big angle of release The second changeover portion (4) is provided between diffuser (5).
- A kind of 5. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The big angle of release diffuser (5) sets Two layers of anti-separation net is equipped with, three layers of damping screen are provided with stable section (6).
- A kind of 6. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The big angle of release diffuser (5) is expanded It is 32 ° to dissipate full-shape.
- A kind of 7. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The wind tunnel noumenon is long tubular knot Structure.
- A kind of 8. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：The upper and lower wall of diffuser (5) expands It is 8.69 ° to dissipate full-shape.
- A kind of 9. atmospheric boundary layer wind tunnel according to claim 1, it is characterised in that：Test section (8) inner roof wall expands Fixed angle of flare is opened as 0.22 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720677287.0U CN206847900U (en) | 2017-06-12 | 2017-06-12 | A kind of atmospheric boundary layer wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720677287.0U CN206847900U (en) | 2017-06-12 | 2017-06-12 | A kind of atmospheric boundary layer wind tunnel |
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| Publication Number | Publication Date |
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| CN206847900U true CN206847900U (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720677287.0U Expired - Fee Related CN206847900U (en) | 2017-06-12 | 2017-06-12 | A kind of atmospheric boundary layer wind tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084829A (en) * | 2017-06-12 | 2017-08-22 | 西南交通大学 | A kind of atmospheric boundary layer wind tunnel |
| CN108458850A (en) * | 2018-04-04 | 2018-08-28 | 泰山学院 | A kind of small-sized wind tunnel for equipment test of eroding |
| CN111912596A (en) * | 2020-07-27 | 2020-11-10 | 西北工业大学 | Small-sized straight-flow wind tunnel diffusion section with ultra-long fairing and annular separation-preventing net |
| CN113252293A (en) * | 2021-06-08 | 2021-08-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Gas rectification structure inside box body |
-
2017
- 2017-06-12 CN CN201720677287.0U patent/CN206847900U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084829A (en) * | 2017-06-12 | 2017-08-22 | 西南交通大学 | A kind of atmospheric boundary layer wind tunnel |
| CN108458850A (en) * | 2018-04-04 | 2018-08-28 | 泰山学院 | A kind of small-sized wind tunnel for equipment test of eroding |
| CN111912596A (en) * | 2020-07-27 | 2020-11-10 | 西北工业大学 | Small-sized straight-flow wind tunnel diffusion section with ultra-long fairing and annular separation-preventing net |
| CN111912596B (en) * | 2020-07-27 | 2022-06-07 | 西北工业大学 | Small-sized straight-flow wind tunnel diffusion section with ultra-long fairing and annular separation-preventing net |
| CN113252293A (en) * | 2021-06-08 | 2021-08-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Gas rectification structure inside box body |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20200612 |