CN205958224U - Adopt vibration grid to regulate and control wind -tunnel test device of turbulence scale in real time - Google Patents
Adopt vibration grid to regulate and control wind -tunnel test device of turbulence scale in real time Download PDFInfo
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- CN205958224U CN205958224U CN201620570091.7U CN201620570091U CN205958224U CN 205958224 U CN205958224 U CN 205958224U CN 201620570091 U CN201620570091 U CN 201620570091U CN 205958224 U CN205958224 U CN 205958224U
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Abstract
The utility model discloses the method that at first adopts the vibration grid has provided an adopt vibration grid to regulate and control wind -tunnel test device of turbulence scale in real time to homogeneous turbulence field research, and the grid setting links to each other the grid at the wind -tunnel incasement with the motor, and motor drive changes the vibration speed of vibration grid for controllable vibration takes place at the wind -tunnel incasement for grid web. Incoming flow wind can pass this grid, adopts the turbulence intensity of grid web's wake flow enhanced experiment position, and realization turbulence intensity's is accurate adjustable. The utility model discloses aim at obtaining the control method of homogeneous turbulence field turbulence scale to the charming appearance and behaviour vibration response experiment of decking isotructure after the match of specific homogeneous turbulence is develoied to the accuracy, and then adopt vibration grid, wedge and the coarse combination coupled system of unit, and simulate the atmospheric boundary layer in the actual engineering, realize the accurate assay to architectural model wind vibration response. The utility model discloses a to the research of structure in homogeneous turbulence field and atmospheric boundary layer wind field, can satisfy the wind vibration response analysis demand of multiple structure.
Description
Technical field
This utility model belongs to hydrodynamics experimental technique field and in particular to a kind of adopt oscillating grid real-time monitoring rapid
The flow tunnel testing device of mobility and the method for strengthening atmospheric boundary layer wind tunnel turbulivity.
Background technology
At present, the wind tunnel simulation of atmospheric boundary layer is for the wind load of building, the diffusion of atmospheric pollution matter and some rings
The research of border science or even military project etc. has particularly important meaning, and its analogy method also enjoys the concern of scholars.?
In existing analogy method, active analogy method and passive simulation method two types can be roughly divided into.Actively simulation side
The principle of method is using controllable active disturbance device, primary air in wind-tunnel to be disturbed, extra by providing to turbulent flow
Energy and so that wind profile and turbulivity is independently changed within the specific limits, thus realizing the simulation of atmospheric boundary layer.Actively
Analogy method can realize the simulation to wind profile and turbulivity well, but because its technical requirements is high, cost expense
The reason such as huge, the method fails to be carried out well.The principle of passive simulation method is using specific device, wind field to be entered
The different degrees of blocking of row and make wind field wind speed that shear layer to occur, and a small amount of kinetic energy is converted into the pulsating energy of turbulent flow, thus real
The now simulation to atmospheric boundary layer.In passive simulation method, the method being most frequently with is vortex generator, baffle plate and roughness element
Combination.Show through all kinds of wind-tunnel Boundary layer simulation results, this adjustment method can simulate Real Atmosphere side substantially
The mean wind speed profile of interlayer, but the simulation for turbulivity profile is often unsatisfactory, builds especially for city high level
During building the Boundary layer simulation of thing and towering slim-lined construction etc., usually occur that boundary region top turbulivity is too small etc. to ask
Topic, makes result of the test produce deviation.So, the simulation of atmospheric turbulence of boundary layer degree is remained with the focus of wind tunnel simulation.
Equidistantly grid make because it can produce homogeneous turbulence field in wind field its in simulation of wind device in occupation of
Irreplaceable effect, particularly in bridge structure wind tunnel test, can simulate the more uniform turbulence intensity in local and amass
Yardstick flow field is divided to be particularly important.Grid is capable of the relation of preferably controlled wind speed and turbulivity, so to its wake characteristic
Research also attention.For example, prior art CN104316286A provides a kind of rotor firing test platform low side design side
Method；And half active analog of CN104596725A wind-tunnel harmonic wave wind field.
Prior art is primarily present problems with：
1st, the range of disturbance of roughness element too small it is impossible to be efficiently diffused into relative height.Research shows, the having of roughness element
Effect substantially 5 times length of sides of range of disturbance, its coverage is far smaller than the physical dimension of wind-tunnel；
2nd, the high-altitude turbulent flow being produced by vortex generators such as wedges rapid decay in flow field, treats that its wake flow develops into test
During disk, turbulence energy remains little；
3rd, the stationary grizzly nowadays relatively often using can not be widely varied flow field turbulivity, so that modeling wind field has
Limitation.
Content of the invention
This utility model first passes through to be studied to homogeneous turbulence field using the method for oscillating grid, and a kind of employing is vibrated
The flow tunnel testing device of grid real-time monitoring turbulivity is directed to the control method of homogeneous turbulence field turbulivity, thus realize right
The isostructural response of floorings off field of different homogeneous turbulences；Then again by the coupling of oscillating grid, wedge and roughness element, right
Atmospheric boundary layer is simulated, thus realizing the analysis to BUILDINGS MODELS wind vibration response.Therefore this utility model can be realized to knot
Research in homogeneous turbulence field and atmospheric boundary layer wind field for the structure, can adapt to the wind-induced response of various structures.
The method using changing grid plugging rate, motional amplitude and frequency and grid and experiment rotating disk distance for the oscillating grid
To change the turbulivity in flow field.
Specifically, this utility model is achieved through the following technical solutions, and described one kind adopts oscillating grid real-time monitoring
The flow tunnel testing device of turbulivity, including：
One wind-tunnel case, the two of which opposite face of wind-tunnel case is hollow, and grid is arranged in wind-tunnel case, to flow wind and can wear
Cross this grid, wherein, grid is connected with motor, change the vibration velocity of oscillating grid by Motor drive, realize grille strip and exist
Vibration in wind-tunnel case.
The grizzly bar of preferred grid, in the form of square-section, by being connected with motor, and changes shaking of oscillating grid
Dynamic speed, realizes vibration in wind-tunnel case for the grille strip, and this vibration can increase turbulivity (about amplification is 7%～30%).
Oscillating grid vibration is fast, and turbulivity increases；Conversely, reducing.
This utility model preferred grid width takes 0.35m, 0.25m, 0.15m and 0.05m respectively.
This utility model is analyzed to grille-like using the arrangement form of each four grids anyhow.Grid bar number anyhow
It is respectively tetra- project profiles of 7*10,6*8,5*6 and 4*4.
Further preferably in scheme, wind-tunnel case is cuboid or square.Preferably set at the top of wind-tunnel case and bottom
Put track, and wind-tunnel case is by being connected with motor, under Motor drive, reciprocating along track.
This utility model further provides for a kind of method strengthening atmospheric boundary layer wind tunnel turbulivity, wherein, using front
State a kind of flow tunnel testing device of employing oscillating grid real-time monitoring turbulivity.
Concrete grammar includes：According to flow landscape condition, start motor, by changing the vibration speed of oscillating grid with motor
Degree, realizes vibration in wind-tunnel case for the grille strip；And under Motor drive, reciprocating along track；By real-time monitoring
Turbulivity at T point in wind-tunnel case, to determine that the turbulivity in wind-tunnel case meets experiment demand, in the presence of oscillating grid,
Wind field middle and upper part turbulivity is made to be enhanced, thus realizing the simulation to atmospheric boundary layer.
The beeline away from side wall for the building T point is no less than the 15% of test section width；Beeline away from roof is not
Should be less than the 25% of test section height；Blockage ratio is preferably not less than 5%, and maximum is not to be exceeded 8%；Thus improving the accurate of test
Degree.
In order to realize the control of variable, the form parameter of grid is mainly included in grille strip number N, grid width B and grid
Heart hole length of side C1, C2, wherein, grille-like parameter is preferably chosen as shown in table 1, table 2.
Table 1
And table 2
Wherein, for grating thickness H, in wind tunnel test, grid mainly by the ponding to flow wind to wind
Disturbance is realized and turbulization in field, therefore the impact to wind field wake flow for the grating thickness H can not considered.Grid frequency of vibration can increase
Also increase flow field undulatory property in time while big turbulence intensity, and its amplitude that turbulivity is increased is also with the increasing of frequency
Plus and reduce, therefore grid frequency of vibration is unsuitable excessive.And the frequency of vibration of grid is on the Flow Field Distribution impact of test section less, its
The size of only stream field turbulence intensity value has large effect.The impact of various amplitude stream field and grid frequency of vibration stream field
Affecting laws be similar to, all should not have excessive amplitude thus leading to fluctuating margin excessive.But change amplitude stream field turbulivity
Raising still very important, it is capable of that flow field turbulence intensity improves and rule stream field debugging that speed does not change has
Very big help.
This utility model concrete principle includes：In atmospheric boundary layer simulation of wind, in addition to oscillating grid, increasing of still needing
Plus the auxiliary device such as wedge and roughness element realizes Boundary layer simulation.Specify four class landforms wind characteristic hatching lines as base with specification
Standard, wedge and roughness element can make wind field produce wind profile and the turbulence profile that compliant specifies, this reality in middle and lower part
With new in the presence of oscillating grid, wind field middle and upper part turbulivity is made to be enhanced, thus realizing the mould to atmospheric boundary layer
Intend.
Specifically,
(1) increase grid width and can strengthen flow field turbulence intensity, but grid width is excessive, flow field turbulence intensity is uneven
Even, and grid width is too small, turbulence intensity distribution profile is approximately grid-like.Therefore work as and need to strengthen flowing field stability or turbulence intensity value
When, the adjusting range of grid width can be determined by flow field turbulivity distribution profile.And increase grid number to turbulence intensity
Size impact less, and can make velocity amplitude reduce, but when grid number reaches certain value, wind speed is not with the change of grid number
Change.For the distribution spatially of turbulence intensity and speed, increase grid number and can improve flow field uniformity well, but
Grid number is unsuitable excessive, it is to avoid obvious lamination.
(2) increase grid frequency of vibration and the impact of amplitude stream field turbulivity and speed is much like, both approaches are equal
Turbulence intensity can be made to increase, but so that flow field time dependent fluctuating margin is increased simultaneously, and its impact to speed except
Undulatory property does not have other significantly to affect beyond increasing.Therefore in grid movements parameter is chosen, frequency is chosen with amplitude should not mistake
Greatly, it is to avoid the time dependent fluctuating margin in flow field is excessive.
(3) in oscillating grid wake flow, the distribution in each section of turbulence intensity and speed becomes rapidly uniform, and it becomes uniformly
Required fetch be about wind-tunnel width and highly in smaller value.In the flow field that wake flow is evenly distributed, change measuring point and grid
Distance has a great impact to turbulence intensity, and its modification scope reaches 7%-21%, and its corresponding undulatory property also increases, but still place
Within stable restriction scope.
(4) the turbulence intensity regularity of distribution over time and space and Distribution Value size are all unrelated with the wind speed that becomes a mandarin, and become a mandarin
Wind speed only changes the size of wind speed in flow field, does not change the regularity of distribution of wind speed in flow field.
This utility model includes with respect to the beneficial effect that prior art is played：
1st, pass through to change grid size, vibration velocity achieves the real-time quantization regulation and control to wind field turbulence intensity；
2nd, the reciprocating motion of oscillating grid, the wake flow being formed after the jet being formed at hole and grizzly bar interacts, energy
Forming controlled turbulent flow in grid certain limit, thus strengthening turbulence intensity.
Brief description
A kind of schematic diagram of the flow tunnel testing device of Fig. 1 this utility model employing oscillating grid real-time monitoring turbulivity；
The work process of feedback figure of Fig. 2 this utility model oscillating grid；
Fig. 3 this utility model oscillating grid schematic diagram, wherein, the shape of grid and parameter mainly include grille strip number N, lattice
Grid width B, grating thickness H and grid centre bore length of side C1, C2.
Specific embodiment
With reference to concrete example and accompanying drawing, this utility model is described in further detail, but of the present utility model interior
Hold and be not limited to embodiment.
Embodiment 1
As shown in Figure 1,3, a kind of flow tunnel testing device of employing oscillating grid real-time monitoring turbulivity, including：
One wind-tunnel case, the two of which opposite face of wind-tunnel case is hollow, and grid is arranged in wind-tunnel case, to flow wind and can wear
Cross this grid, wherein, grid is connected with motor, change the vibration velocity of oscillating grid by Motor drive, realize grille strip and exist
Vibration in wind-tunnel case.
Embodiment 2
As shown in Figure 1,3, a kind of flow tunnel testing device of employing oscillating grid real-time monitoring turbulivity, including：
One wind-tunnel case, the two of which opposite face of wind-tunnel case is hollow, and grid is arranged in wind-tunnel case, to flow wind and can wear
Cross this grid, wherein, grid is connected with motor, change the vibration velocity of oscillating grid by Motor drive, realize grille strip and exist
Vibration in wind-tunnel case.
Wind-tunnel case is cuboid or square, arranges track in the top of wind-tunnel case and bottom, and wind-tunnel case by with
Motor is connected, so that reciprocating along track under Motor drive.
Embodiment 3
As shown in Figure 1,3, in a kind of flow tunnel testing device base of employing oscillating grid real-time monitoring turbulivity of embodiment 2
On plinth, the form parameter of grid mainly includes grille strip number N, grid width B and grid centre bore length of side C1, C2, wherein, grid
Form parameter is chosen as follows：
And
Embodiment 4
As shown in Figure 1,2 and 3, using a kind of wind tunnel test of employing oscillating grid real-time monitoring turbulivity of embodiment 3
Device, according to flow landscape condition, starts motor, by changing the vibration velocity of oscillating grid with motor, realizes grille strip in wind
Vibration in the case of hole；And under Motor drive, reciprocating along track；By the rapids at T point in real-time monitoring wind-tunnel case
Mobility, to determine that the turbulivity in wind-tunnel case meets experiment demand, in the presence of oscillating grid, makes wind field middle and upper part turbulivity
It is enhanced, thus realizing the simulation to atmospheric boundary layer, by changing grid size, vibration velocity achieves to wind field turbulent flow
The real-time quantization regulation and control of intensity.
The beeline away from side wall for the building T point is no less than the 15% of test section width；Beeline away from roof is not
Should be less than the 25% of test section height；Blockage ratio is preferably not less than 5%, and maximum is not to be exceeded 8%；Thus improving the accurate of test
Degree.
Select above-mentioned corresponding grid parameter, frequency, amplitude, the wind speed parameter that becomes a mandarin are as follows：
And
Analog result shows, active oscillating grid of the present utility model can increase turbulivity (about amplification be 7%～
30%).
Above content be with reference to specific preferred implementation further detailed description of the utility model it is impossible to
Identification is of the present utility model to be embodied as being confined to these explanations.Ordinary skill for this utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should regard
For belonging to protection domain of the present utility model.
Claims (6)
1. a kind of flow tunnel testing device of employing oscillating grid real-time monitoring turbulivity is it is characterised in that include：One wind-tunnel
Case, the two of which opposite face of wind-tunnel case is hollow, and grid is arranged in wind-tunnel case, to flow wind and to may pass through this grid, wherein, lattice
Grid are connected with motor, change the vibration velocity of oscillating grid by Motor drive, realize vibration in wind-tunnel case for the grille strip.
2. the flow tunnel testing device of a kind of employing oscillating grid real-time monitoring turbulivity according to claim 1, its feature
It is, the grizzly bar of grid is in the form of square-section.
3. the flow tunnel testing device of a kind of employing oscillating grid real-time monitoring turbulivity according to claim 1, its feature
It is, grid width takes 0.35m, 0.25m, 0.15m and 0.05m respectively.
4. the flow tunnel testing device of a kind of employing oscillating grid real-time monitoring turbulivity according to claim 1, its feature
It is, bar number is respectively 7*10,6*8,5*6 and 4*4 to grid anyhow.
5. the flow tunnel testing device of a kind of employing oscillating grid real-time monitoring turbulivity according to claim 1, its feature
It is, wind-tunnel case is cuboid or square.
6. the flow tunnel testing device of a kind of employing oscillating grid real-time monitoring turbulivity according to claim 1, its feature
It is, track is set in the top of wind-tunnel case and bottom, and wind-tunnel case is by being connected with motor, under Motor drive, along rail
Road is reciprocating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570091.7U CN205958224U (en) | 2016-06-12 | 2016-06-12 | Adopt vibration grid to regulate and control wind -tunnel test device of turbulence scale in real time |
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| CN201620570091.7U CN205958224U (en) | 2016-06-12 | 2016-06-12 | Adopt vibration grid to regulate and control wind -tunnel test device of turbulence scale in real time |
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| CN105910793A (en) * | 2016-06-12 | 2016-08-31 | 哈尔滨工业大学深圳研究生院 | Active vibration grating capable of increasing atmosphere boundary layer wind tunnel turbulence level |
| CN107764504A (en) * | 2017-09-15 | 2018-03-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of device for measuring cloud and mist uniformity |
| CN107985628A (en) * | 2017-12-13 | 2018-05-04 | 南京林业大学 | The simulation of wind device that wind resistance detects in a kind of agricultural unmanned plane room |
| CN108303230A (en) * | 2018-01-25 | 2018-07-20 | 广州大学 | A kind of test system for wind energy collecting device direction vibration wind tunnel test |
| CN110907117A (en) * | 2019-12-05 | 2020-03-24 | 重庆大学 | Wind tunnel test model for simulating structural aeroelastic and aerodynamic characteristics under action of torsional wind field in mountainous area |
| CN111060320A (en) * | 2019-12-24 | 2020-04-24 | 南京航空航天大学 | Porous hinge type intake pressure distortion element |
| CN112504620A (en) * | 2020-11-26 | 2021-03-16 | 哈尔滨工业大学（深圳） | Uniform turbulent flow field generating device based on drive control |
| CN112665814A (en) * | 2020-12-15 | 2021-04-16 | 中国人民解放军国防科技大学 | Fluid generation system with adjustable speed profile |
| CN112985744A (en) * | 2021-03-24 | 2021-06-18 | 中国科学院工程热物理研究所 | Grid device for wind tunnel experiment and regulating and controlling method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910793B (en) * | 2016-06-12 | 2019-01-22 | 哈尔滨工业大学深圳研究生院 | A kind of active oscillating grid enhancing atmospheric boundary layer wind tunnel turbulivity |
| CN105910793A (en) * | 2016-06-12 | 2016-08-31 | 哈尔滨工业大学深圳研究生院 | Active vibration grating capable of increasing atmosphere boundary layer wind tunnel turbulence level |
| CN107764504A (en) * | 2017-09-15 | 2018-03-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of device for measuring cloud and mist uniformity |
| CN107985628A (en) * | 2017-12-13 | 2018-05-04 | 南京林业大学 | The simulation of wind device that wind resistance detects in a kind of agricultural unmanned plane room |
| CN108303230B (en) * | 2018-01-25 | 2023-05-23 | 广州大学 | Test system for bidirectional vibration wind tunnel test of wind energy collector |
| CN108303230A (en) * | 2018-01-25 | 2018-07-20 | 广州大学 | A kind of test system for wind energy collecting device direction vibration wind tunnel test |
| CN110907117A (en) * | 2019-12-05 | 2020-03-24 | 重庆大学 | Wind tunnel test model for simulating structural aeroelastic and aerodynamic characteristics under action of torsional wind field in mountainous area |
| CN110907117B (en) * | 2019-12-05 | 2020-10-09 | 重庆大学 | Wind tunnel test model for simulating structural aeroelastic and aerodynamic characteristics under action of torsional wind field in mountainous area |
| CN111060320A (en) * | 2019-12-24 | 2020-04-24 | 南京航空航天大学 | Porous hinge type intake pressure distortion element |
| CN112504620B (en) * | 2020-11-26 | 2023-02-03 | 哈尔滨工业大学（深圳） | Uniform turbulent flow field generating device based on drive control |
| CN112504620A (en) * | 2020-11-26 | 2021-03-16 | 哈尔滨工业大学（深圳） | Uniform turbulent flow field generating device based on drive control |
| CN112665814A (en) * | 2020-12-15 | 2021-04-16 | 中国人民解放军国防科技大学 | Fluid generation system with adjustable speed profile |
| CN112665814B (en) * | 2020-12-15 | 2022-10-18 | 中国人民解放军国防科技大学 | Fluid generation system with adjustable speed profile |
| CN112985744A (en) * | 2021-03-24 | 2021-06-18 | 中国科学院工程热物理研究所 | Grid device for wind tunnel experiment and regulating and controlling method thereof |
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Granted publication date: 20170215 Termination date: 20170612 |