CN102539109B - Wind tunnel flow field display test model rotating bracket - Google Patents
Wind tunnel flow field display test model rotating bracket Download PDFInfo
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- CN102539109B CN102539109B CN201210016917.1A CN201210016917A CN102539109B CN 102539109 B CN102539109 B CN 102539109B CN 201210016917 A CN201210016917 A CN 201210016917A CN 102539109 B CN102539109 B CN 102539109B
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- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000000917 particle-image velocimetry Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
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- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009331 sowing Methods 0.000 description 2
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- 231100000419 toxicity Toxicity 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The invention discloses a rotating bracket for wind-tunnel flow-field display test models, and the rotating bracket is provided for solving the problems that in a wind-tunnel flow-field display test, the adjustment on the levelness and rotating angle of the traditional test model is inconvenient and not high in precision. A bottom plate of the bracket is provided with a height adjusting bolt and a level instrument so as to meet the requirements on the levelness of the test model; the edge of a top plate of the bracket is provided with an angle scale line, and a rotating plate is arranged above the top plate, then the model can be rotated quickly and accurately so as to adjust the test model to a required wind attack angle; and besides the wind-tunnel flow-field display test, the bracket also takes the demands of a pressure measuring test for wind tunnels into consideration, holes are arranged in the centers of the top plate and the rotating plate so as to facilitate the connection between a pressure measuring pipe at the bottom of the model and a pressure measuring device below a floor board of a wind tunnel. The rotating bracket disclosed by the invention can be used for solving the problem that in a wind-tunnel flow-field display test, the manual adjustment on the levelness and rotating angle of a model is poor in precision; and the rotating bracket not only can be applied to wind-tunnel flow-field display tests on pure building structure scaled models in wind tunnels, but also can be applied to synchronous pressure measuring tests.
Description
Technical field
Flow Field in Wind Tunnel shows in test, conventionally need to take streamline and the velocity field distribution on building structure scaled model surface under multiple wind angle, thereby need in test multiple rotary model, to simulate different wind angles.The present invention is a kind of rotating bracket for wind-tunnel flow-field display test models that facilitates adjustment model angle, has effectively improved efficiency and the precision of angular adjustment.
Background technology
Flow field display technique is an important component part of fluid mechanics test, particle image velocimetry (Particle Image Velocimetry wherein, abbr. be PIV) on the basis of traditional flow field display technique, utilize the achievement in research of optical technology and image analysis technology and the new flow field means of testing that shoots up.The important feature of PIV technology is exactly the limitation that has broken through space spot measurement technology, information that can be in synchronization is recorded whole measurement plane, and then obtain plane velocity field, Vorticity Field and eddy stress distribution etc.Along with the development of PIV technology, external most of researchist directly applies to PIV method in the wind tunnel test of building structure scaled model, with the vortex on observation structure surface, stream phenomenon.The ultimate principle of PIV is as follows: in flow field, sow suitable trace particle, the laser light sheet that then pulsed laser sends can doublely illuminate tested flow field, by image capturing system, records respectively t
1, t
2flow field particle picture (its time interval, ⊿ t was accurately adjustable) constantly, through the displacement of particle in Digital Image Processing Qiu Chu ⊿ t, and then obtain trace particle velocity field, further Treatment Analysis just can obtain the information of flows such as velocity field, Vorticity Field, streamline in whole flow field.
Flow Field in Wind Tunnel shows the layout of test in wind-tunnel as shown in Figure 1, and wherein model 32 is generally placed in wind-tunnel section 31 centers, and pulsed laser 33 is placed in wind-tunnel top.Because wind tunnel side wall bottom is that solid transparent materials and wind tunnel floor are larger on the impact in test flow field, this just causes CCD camera 34 directly to shelve on the ground, but should raise shooting, thereby also correspondingly frame is high fixing by model in test, to need to arrange support 35, CCD camera 34 make model height basic highly consistent with CCD camera 34, so that can effectively catch the information of flow of model top.
Building structure model in actual wind tunnel test has asymmetry conventionally, and most different wind directions of consideration that need in operating condition of test design, in addition the pulsed laser that PIV test is at present used has stationarity and is difficult for the property adjusted, traditional method is that testing crew enters wind-tunnel, by repeatedly moving support and model to reach the desired wind angle of attack.Yet because heaviness and the adjustment of model support are not strong with reference to property, especially, in the situation that having set the multiple test wind angle of attack, this traditional method makes the adjustment precision of the model wind angle of attack be difficult to be guaranteed.In addition, the trace particle system sowing in PIV test produces by smog, and this smog has certain toxicity, exposes to the open air for a long time in this trace particle environment larger to human injury.In test, should have time enough carry out the adjustment of model angle and reach accuracy requirement, avoid again exposing to the open air for a long time in smog environment, this just shows that to Flow Field in Wind Tunnel test has proposed precision and the parallel requirement of efficiency.
Summary of the invention
The invention provides a kind of rotating bracket for wind-tunnel flow-field display test models that shows test for building structure wind-tunnel flow field.The present invention can adjust the relative angle of model and incoming flow in wind tunnel test rapidly, continuously; And adjusting pole level levelling degree exactly, to lay reposefully test model.
The present invention adopts following technical scheme:
A kind of rotating bracket for wind-tunnel flow-field display test models, comprise: the base plate being parallel to each other and top board, at base plate and top board, be provided with sub-truss, on top board, be provided with center hole, on the circumference of center hole, be provided with flange, on flange, be arranged with swivel plate, on swivel plate, be provided with tuning drive gear and some model set bolts, on top board, be provided with the scale mark being used in conjunction with tuning drive gear, on top board, be provided with spacing button, and spacing button one end is fixedly connected with top board, the other end is positioned at swivel plate edge top face, at the spacing limited location set bolt that is threaded of buckling.
The present invention further adopts following technical measures:
On base plate, be provided with the first level meter and the second level meter and height adjustment bolt, the first described level meter and the second level meter quadrature arrangement, described height adjustment bolt is connected with base thread and the head of height adjustment bolt passes base plate, head in height adjustment bolt is provided with bulb, and height adjustment bolt is connected with rubber blanket by ball joint-rotating.
Beneficial effect:
Building structure model in actual wind tunnel test has asymmetry conventionally, and most different wind directions of consideration that need in operating condition of test design, in addition the pulsed laser that PIV test is at present used has stationarity and is difficult for the property adjusted, traditional method is that testing crew enters wind-tunnel, by repeatedly moving support and model to reach the desired wind angle of attack.Yet because heaviness and the adjustment of model support are not strong with reference to property, especially, in the situation that having set the multiple test wind angle of attack, this traditional method makes the adjustment precision of the model wind angle of attack be difficult to be guaranteed.In addition, the trace particle system sowing in PIV test produces by smog, and this smog has certain toxicity, exposes to the open air for a long time in this trace particle environment larger to human injury.In test, should have time enough carry out the adjustment of model angle and reach accuracy requirement, avoid again exposing to the open air for a long time in smog environment, this just shows that to Flow Field in Wind Tunnel test has proposed precision and the parallel requirement of efficiency.
The invention provides a kind of simple structure, rotating bracket for wind-tunnel flow-field display test models easy to process: at base plate, level meter and height adjustment bolt are set, have solved the problem that support level degree is adjusted; The universal joint that frame bottom coupling bolt and rubber blanket adopt can effectively be avoided the impact of ground out-of-flatness on cradle top surface levelness.And frame bottom rubber blanket can provide enough side-friction forces.On top board, additional swivel plate and angle index line, establish tuning drive gear on swivel plate, and both cooperations can be fast, accurate rotating model needed angle extremely.
This support has met the demand that Flow Field in Wind Tunnel shows test model support height on the one hand, has on the other hand that angle rotation is quick accurately, a Level-adjusting feature easily, has avoided the modal position error of introducing because manually moving model.Regulate quickly and easily model to required orientation, effectively avoided operating personnel to be exposed to for a long time among the smog that trace particle produces, reduced its injury to human body.
Top board, base plate and swivel plate all adopt steel plate to make, between top board and base plate by adopting leverage sub-truss to be connected; Swivel plate and the perforate of top board center, and at the reserved flange of top board central hole, swivel plate is enclosed within on this flange, top board and swivel plate can rotate in face is carried out at center; Top board edge arranges spacing button, and the spacing set bolt of buckling withstands swivel plate after tightening, and retrains thus relatively rotating between top board and swivel plate.Some bolts are set, for being connected of model in wind tunnel and swivel plate on swivel plate; Top board edge arranges angle index line, and swivel plate is provided with pointer scale, and both coordinate to determine model relative rotation angle.Base plate is provided with the first level meter and second level meter of height adjustment bolt and quadrature arrangement; The bulb of height adjustment bolt end is imbedded in rubber blanket, the transfer of rubber blanket while preventing from forwarding height adjustment bolt on the one hand, the impact of avoiding on the other hand height adjustment bolt and base plate verticality difference to regulate levelness, thereby there is good Level tune function, the irregular situation in applicable ground; The side direction antiskid that support improves in the effect system of rubber blanket moves bearing capacity, avoids that beam wind load is excessive to be caused support slippage or occur micro breadth oscillation and then affect model test result.
Another effect of top board and swivel plate center drilling is in the time need carrying out model manometric test, and piezometric tube can be derived, is connected on pressure instrumentataion by this hole.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, further the present invention will be described.
PIV testing tool and modal position figure in Fig. 1 wind-tunnel.
Fig. 2 support elevation drawing.
Fig. 3 support planimetric map.
1-1 section in Fig. 4 Fig. 2.
2-2 section in Fig. 5 Fig. 3.
Fig. 6 height adjustment bolt and rubber blanket.
Fig. 7 support 3-D view.
In above figure, have: wind-tunnel section 31, model in wind tunnel 32, pulsed laser 33, CCD camera 34, model support 35;
Swivel plate 1, top board 2, base plate 3, sub-truss 4, spacing button 5, spacing set bolt 6, height adjustment bolt 7, flange 8, model set bolt 9, tuning drive gear 10, the first level meter 21, the second level meter 22, rubber blanket 12, scale mark 13.
Embodiment
A kind of rotating bracket for wind-tunnel flow-field display test models, comprise: the base plate 3 and the top board 2 that are parallel to each other, at base plate 3 and top board 2, be provided with sub-truss 4, on top board 2, be provided with center hole, on the circumference of center hole, be provided with flange 8, on flange 8, be arranged with swivel plate 1, on swivel plate 1, be provided with tuning drive gear 10 and some model set bolts 9, on top board 2, be provided with the scale mark 13 being used in conjunction with tuning drive gear 10, with the anglec of rotation of accurate location model.
On top board 2, be provided with spacing button 5, and spacing button 5 one end are fixedly connected with top board 2, the other end is positioned at swivel plate 1 edge top face, and limited location set bolt 6 is threaded on spacing button 5.On base plate 3, be provided with the first level meter 21 and the second level meter 22 and height adjustment bolt 7, the first described level meter 21 and the second level meter 22 quadrature arrangement, described height adjustment bolt 7 is threaded with base plate 3 and the head of height adjustment bolt 7 passes base plate 3, head in height adjustment bolt 7 is provided with bulb 14, and height adjustment bolt 7 is by bulb 14 rubber blanket 12 that has been rotatably connected.
Claims (2)
1. a rotating bracket for wind-tunnel flow-field display test models, it is characterized in that, comprise: the base plate being parallel to each other (3) and top board (2), at base plate (3) and top board (2), be provided with sub-truss (4), on top board (2), be provided with center hole, on the circumference of center hole, be provided with flange (8), at the upper cover of flange (8), there is swivel plate (1), on swivel plate (1) model, be provided with tuning drive gear (10) and some model set bolts (9), on top board (2), be provided with the scale mark (13) being used in conjunction with tuning drive gear (10), on top board (2), be provided with spacing button (5), and spacing button (5) one end is fixedly connected with top board (2), the other end is positioned at swivel plate (1) edge top face, limited location set bolt (6) is threaded on spacing button (5).
2. rotating bracket for wind-tunnel flow-field display test models according to claim 1, it is characterized in that, on base plate (3), be provided with the first level meter (21) and the second level meter (22) and three height adjustment bolt (7), described the first level meter (21) and the second level meter (22) quadrature arrangement, described height adjustment bolt (7) is threaded with base plate (3) and the head of height adjustment bolt (7) passes base plate (3), head in height adjustment bolt (7) is provided with bulb (14), height adjustment bolt (7) is by bulb (14) rubber blanket (12) that has been rotatably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210016917.1A CN102539109B (en) | 2012-01-19 | 2012-01-19 | Wind tunnel flow field display test model rotating bracket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210016917.1A CN102539109B (en) | 2012-01-19 | 2012-01-19 | Wind tunnel flow field display test model rotating bracket |
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| CN102539109A CN102539109A (en) | 2012-07-04 |
| CN102539109B true CN102539109B (en) | 2014-02-26 |
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| CN104408703A (en) * | 2014-11-28 | 2015-03-11 | 中国航空工业空气动力研究院 | Wind tunnel dynamic test piece optical flow visualization system and image phase averaging method thereof |
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| CN107290123B (en) * | 2017-06-07 | 2019-05-24 | 中国航天空气动力技术研究院 | The big angle of attack device of multiple degrees of freedom wind-tunnel |
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| CN108132131A (en) * | 2017-12-22 | 2018-06-08 | 郑州大学 | The device and method of the structures under wind experiment zero degree wind angle of attack is determined using garage's sailing |
| CN108007957A (en) * | 2017-12-26 | 2018-05-08 | 中国航天空气动力技术研究院 | A kind of model support attack angle mechanism |
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| CN112556979B (en) * | 2021-02-22 | 2021-05-07 | 中国空气动力研究与发展中心低速空气动力研究所 | Synchronous rotation control device and method for upper and lower turnplates of wind tunnel test section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100485341C (en) * | 2005-03-25 | 2009-05-06 | 武汉科技大学 | Small low-speed wind tunnel experiment model stand |
| US8953035B2 (en) * | 2009-07-08 | 2015-02-10 | Honda Motor Co., Ltd. | Particle image velocimetry method, particle image velocimetry method for 3-dimensional space, particle image velocimetry system, and tracer particle generating device in particle image velocimetry system |
| CN101986160B (en) * | 2010-05-19 | 2012-11-07 | 北京航空航天大学 | Position-locking shooting method and device for carrying out particle image velocemetry (PIV) measurement under model dynamic pitching |
| CN102042902B (en) * | 2010-11-18 | 2013-06-05 | 上海工程技术大学 | Test piece fixing device of thermal state wind tunnel erosion test |
| CN102175417B (en) * | 2010-11-30 | 2013-04-10 | 哈尔滨工业大学 | Spatial positioning test rack for use in tunnel body of wind tunnel |
| CN202093709U (en) * | 2011-06-17 | 2011-12-28 | 南京化工职业技术学院 | Fluid flow line, flow pipe and laminar flow simulation and demonstration instrument device |
| CN102184665B (en) * | 2011-06-17 | 2013-04-17 | 南京化工职业技术学院 | Demonstration instrument for simulating flow line, flow tube and laminar flow of fluid |
| CN202562729U (en) * | 2012-01-19 | 2012-11-28 | 东南大学 | Rotary type model rack for visualization test of wind tunnel flow field |
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