CN109799062A - It is a kind of to blow formula gust wind tunnel with drainage section - Google Patents
It is a kind of to blow formula gust wind tunnel with drainage section Download PDFInfo
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- CN109799062A CN109799062A CN201910225934.8A CN201910225934A CN109799062A CN 109799062 A CN109799062 A CN 109799062A CN 201910225934 A CN201910225934 A CN 201910225934A CN 109799062 A CN109799062 A CN 109799062A
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- 238000012360 testing method Methods 0.000 claims abstract description 54
- 230000008602 contraction Effects 0.000 claims abstract description 15
- 238000013016 damping Methods 0.000 claims abstract description 7
- 230000006641 stabilisation Effects 0.000 claims abstract description 6
- 238000011105 stabilization Methods 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a kind of to blow formula gust wind tunnel, including power section, shunting section, diffuser, drainage section, stabilization and contraction section, test section and outlet diffuser with drainage section.Wherein drainage section is divided to two kinds, and a kind of for the throttle valve type with moving vane, another kind is the drainage structure with windy sector.Described power section one end is connected to the external world, the other end connects shunting section, the shunting section other end is connected to diffuser, diffuser is connected to stabilization and contraction section and connectivity part is provided with honeycomb and damping screen, the stable and contraction section other end is connect with test section, the test section other end is connected to the outlet diffuser communicated with the outside world, and drainage section one end is connect with shunting section, and the other end communicates with the outside world.Using gust wind tunnel of the invention, can be realized generation frequency has height to have low battle array wind.
Description
Technical field
The present invention relates to a kind of gust of property wind wind tunnel experiment devices, more specifically, it relates to a kind of blowing with drainage section
Formula gust wind tunnel.
Background technique
Boundary layer wind tunnel plays increasingly important role in the research in Wind Engineering field.Boundary layer wind tunnel has mould
The ability of quasi- atmospheric boundary laminar flow, can be Pollution Study object Diffusion Law, dust storm mass transfer and long-span bridge,
The safe design research of many other unique textures such as skyscraper, tower provides technical support.
However, when occupying leading role for some extreme weather event (Gust front, hurricane etc.) unstable state air-flows,
Common boundaries layer wind-tunnel lacks the ability for simulating these event transient effects.Therefore, it is necessary to a kind of battle array wind effects of capable of generating
Atmospheric boundary layer wind tunnel.
Turbulent flow in atmosphere, the in general scale of turbulence are bigger, then the frequency of turbulent flow is lower；The bigger obstacle of scale
The scale of turbulence that object generates is bigger.The turbulent flow that normal atmospheric boundary layer wind tunnel is generated by wedge and roughness element, wedge and coarse
The scale of member is generally in 0.1m or so, so the tumbling frequency generated is relatively high.And because having high buildings and large mansions, mountain in real atmosphere
The presence of the biggish barrier of the scales such as slope, the woods, so the energy of low frequency part can not be ignored in turbulent flow, it is therefore necessary to
Generate that scale is larger, the lower fluctuating wind of frequency in wind-tunnel, in this way can be more identical with true atmosphere, here it is our battle arrays
The design sense of wind wind-tunnel.
Currently, mechanical swing mechanism or adjustment wind is usually used in the atmospheric boundary layer wind tunnel that can generate battle array wind effect
Machine revolving speed generates fitful wind.But the fitful wind generated in this way, gust frequency are higher.And in atmospheric boundary layer with
It is low that machine gust velocity generation size variation has height to have, and therefore, current gust wind tunnel can not simulate in atmospheric boundary layer completely
Random fitful wind.
Blowing-type wind-tunnel and suction-type wind-tunnel can be divided into according to the flow direction of air-flow: blowing-type wind-tunnel is blown with blower
Flow media of the air-flow out as wind-tunnel；And suction-type wind-tunnel is then that the low-pressure area to be formed is rotated by fan blade Bigpian, it will be empty
Aspiration enters to form air-flow.Two kinds of wind-tunnel application range is all very wide, but concrete application field and different, suction-type wind
Hole can only be streamed, the wind tunnel test of the non-sand such as flow invariance since blower is in hole body end；And blowing-type wind-tunnel is not only
Above-mentioned non-sand wind tunnel test can be carried out, the test of the sands such as starting wind velocity, the silt discharge of the grains of sand can also be carried out.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provide it is a kind of blow formula gust wind tunnel with drainage section, have
Simulating natural environment, provide it is a kind of have have weak battle array wind advantage by force.
To achieve the above object, the present invention provides the following technical scheme that a kind of blow formula gust wind tunnel with drainage section.
Direct current open circuit is mainly in turn connected to form by following paragraphs, comprising: power section, shunting section, diffuser, stabilization and contraction section, examination
Test section and outlet diffuser and drainage section.The stabilization and contraction section are the equal diameter pipelines for making air-flow keep uniform and stable,
It is also mounted in stable and contraction section including rectifier equipments such as honeycomb damping screens.Honeycomb is comb to air-flow directly to lead
To damping screen is to keep inlet air flow uniform, stable.Drainage section and shunting section junction are provided with shunting door, the drainage section other side
It communicates with the outside world.When shunting door closing, drainage section is out of service；When shunting door unlatching, drainage section brings into operation.Stablize and
Contraction section one end is connected with test section, and air-flow flows into outlet diffuser through test section, and outlet its effect of diffuser is air-flow
Kinetic energy is changed into pressure energy, to reduce the power loss of wind-tunnel.The present invention can be by controlling the drainage blower of drainage section to aspirate
Mode actively outwardly shunts the air-flow of power section, or makes drainage by the folding that fluid pressure linkage controls moving vane on throttle valve
Section blocking area change, change so that power section be made to be diverted into the vent flow of drainage section outwardly, vent flow by
Moving vane opening and closing degree determines.Two methods are to enter the throughput of drainage section by controlling power section, reach and indirectly control
The purpose of main channel test section throughput, so that the throughput of test section changes, to form size variation in test section
Fitful wind.
Drainage section of the present invention may be configured as two kinds, and one kind being provided with throttle valve, and another kind is provided with round corner section and multi-fan
Section.The effect of drainage section is outwardly to discharge after shunting air-flow, and the drainage blower of controllable drainage section is to aspirate
Mode actively outwardly shunts the air-flow of power section, or makes drainage by the folding that fluid pressure linkage controls moving vane on throttle valve
Section blocking area change, change so that power section be made to be diverted into the vent flow of drainage section outwardly, vent flow by
Moving vane opening and closing degree determines.Two methods are to enter the throughput of drainage section by controlling power section, reach and indirectly control
The purpose of main channel test section throughput, so that the throughput of test section changes, to form size variation in test section
Fitful wind.Throttle valve includes several moving vanes and fixed pod.Pod is wherein fixed to be fixed in drainage section, and
And moving vane is connected on each fixed pod, the moving vane on two neighboring fixed pod can pass through
Folding influences the blocking area in drainage section.The drainage section for being provided with fan includes round corner section and windy sector.Pass through round corner section
The ventilation speed in drainage section is controlled with the fan of several proper alignments of windy sector junction fixed setting.Shunting section
Side is connected with power section.Power section includes rear end blower cover, spin-ended, fan and front end blower cover.Fan is located at wind
The front end of machine.Blower cover is divided into front end fan shroud and rear end fan shroud based on position of fan and air flow direction.Rear end wind
Spin-ended is provided on the outside of hood.Power section is connect with shunting section, and air-flow is blown into main channel.
When test, air-flow is flowed into from power section, so that air-flow acceleration is blown into shunting section by fan in power section, is passed through diffusion
Section and the honeycomb damping screen of stable and contraction section junction setting make air-flow become more uniform, stablize, and high-speed flow enters
Test section finally enters in atmosphere when air-flow is by the laggard inlet/outlet diffuser of test section.Power section can make the pressure of inlet air flow
Power improves, and accelerates the discharge of gas.Drainage section can carry out air-flow to shunt to control main channel test section throughput, so that examination
The throughput for testing section changes, and the fitful wind of size variation is finally formed in test section.
Preferably when drainage section is access, moving vane does open and close movement on fluid pressure linkage control throttle valve, works as drainage
When section is closed circuit, moving vane stops.The size of main channel flow constantly changes with the movement of moving vane.
It is preferred to shunt control realization folding of the door by hydraulic device
It is opened or closed it is preferred that shunting door and synchronizing.
The preferred corresponding edge wrap for shunting door has sealing strip.
The preferred shunting section, power section, diffuser, test section, stabilization and contraction section, drainage section and shunting Men Weiquan
Steel construction.
By using above-mentioned technical proposal, the present invention has the advantages that compared with prior art
The present invention is provided with throttle valve with the drainage section for blowing formula gust wind tunnel of drainage section, and throttle valve is equipped with movable leaf
Piece makes drainage section blocking area change, to make power by the folding that fluid pressure linkage controls moving vane on throttle valve
Section is diverted into the vent flow of drainage section outwardly and changes, and vent flow is determined by moving vane opening and closing degree.To control
Power section enters the throughput of drainage section, achievees the purpose that indirectly control main channel test section throughput, so that the gas of test section
Flow changes, to form the fitful wind of size variation in test section.
In addition, drainage section is also provided with round corner section and windy sector.Several drainages being fixed in drainage section are set
Fan forms windy sector, outwardly shunts the air-flow that power section enters drainage section by drainage blower with Smoking regime active
Amount, achievees the purpose that indirectly control main channel test section throughput, so that the throughput of test section changes, thus testing
Section forms the fitful wind of size variation.
The present invention provide with drainage section blow formula gust wind tunnel can real simulation go out the fitful wind of atmospheric boundary layer.
Detailed description of the invention
Fig. 1 is the overall structure diagram for blowing formula gust wind tunnel that drainage section is had in the embodiment of the present invention 1；
Fig. 2 is power section and each component locations schematic diagram of drainage section in the embodiment of the present invention 1；
Fig. 3 is each component locations schematic diagram when moving vane opens in throttle valve in the embodiment of the present invention 1；
Fig. 4 is each component locations schematic diagram when moving vane is closed in throttle valve in the embodiment of the present invention 1；
Fig. 5 is that each component locations schematic diagram when door is closed is shunted in the embodiment of the present invention 1；
Fig. 6 is that each component locations schematic diagram when door is opened is shunted in the embodiment of the present invention 1；
Fig. 7 is the overall structure diagram for blowing formula gust wind tunnel that drainage section is had in the embodiment of the present invention 2；
Fig. 8 is drainage section each section position view in the embodiment of the present invention 2；
Fig. 9 is windy sector component locations schematic diagram in the embodiment of the present invention 2；
Figure 10 is that each component locations schematic diagram when door is closed is shunted in the embodiment of the present invention 2；
Figure 11 is that each component locations schematic diagram when door is opened is shunted in the embodiment of the present invention 2.
In figure: 101, power section；102, shunting section；103, diffuser；104, stable and contraction section；105, test section；
106, diffuser is exported；107, drainage section；108, door is shunted；109, fan；110, front end blower cover；111, rear end fan shroud
Son；112, spin-ended；113, throttle valve；114, diffluence pass；116, honeycomb；118, fixed pod；119, moving vane；
120, hydraulic device；117, damping screen；214, round corner section；221, windy sector.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1:
The embodiment of the present invention propose it is a kind of with drainage section blow formula gust wind tunnel, generate height different frequency to realize
Fitful wind.The formula gust wind tunnel that blows with drainage section of the embodiment of the present invention includes power section 101, shunting section as shown in figures 1 to 6
102, diffuser 103, stable and contraction section 104, test section 105 and outlet diffuser 106,101 one end of power section connection
In the external world, the other end connects shunting section 102, and 102 other end of shunting section is connected to diffuser 103, diffuser 103 and stable and receipts
Contracting section 104 is connected to and is fixedly installed in connectivity part honeycomb 116 and damping screen 117 parallel to each other, stable and contraction section 104
The other end is connect with test section 105, and 105 other end of test section is connected to the outlet diffuser 106 communicated with the outside world, is additionally provided with
Several drainage sections 107, wherein 107 one end of drainage section is connect with shunting section 102, and the other end communicates with the outside world.Drainage section 107 with
The junction of shunting section 102 is diffluence pass 114, is provided at diffluence pass 114 and shunts door 108.Throttling is provided in drainage section 107
Valve 113.Throttle valve 113 includes several moving vanes 119 and fixed pod 118, wherein fixed pod 118 is fixedly installed
In drainage section 107, and moving vane 119 is connected on each fixed pod 118, two neighboring fixed water conservancy diversion
Moving vane 119 on cover 118 can influence the ventilation speed in drainage section 107 by folding.Door 108 is shunted to exist by setting
Hydraulic device 120 on 107 lateral wall of drainage section is opened and closed.Power section 101 is additionally provided with sequentially connected rear end fan shroud
Son 111, spin-ended 112, fan 109 and front end blower cover 110, and rear end blower cover 111 is towards extraneous outlet section, it is preceding
Hold blower cover 110 towards shunting section 102.Power section 101, shunting section 102, diffuser 103, stable and contraction section 104, drainage
Section 107 shunts door 108, test section 105 and exports diffuser 106 as full steel structure.Wind-tunnel overall length 60.5m, test section
2.5m*2m*16m (length), power section φ 5.1m*9.1m (length) are bypassed section 1.7m*4.5m*9m (length).
Blower drives the rotation of fan 109 to be able to generate air-flow when operation, and air-flow is along primary passageway stream through shunting section 102 and row
When flowing the diffluence pass 114 at 107 intercommunication of section, is controlled by hydraulic device 120 and shunt the opening of door 108 so that fraction enters row
Section 107 is flowed, since the power of fan 109 is fixed and invariable, the total air mass flow passed through in shunting section 102 in main channel is solid
Fixed, after drainage section 107 shunts a part of flow, the flow in test section 105 tails off, and throttles when in drainage section 107
When moving vane 119 opens and closes in valve 113, the flow outwardly discharged in drainage section 107 can generate variation, and then test section
Flow in 105 can also generate variation, and the fitful wind of size variation is eventually generated in test section, specifically, working as moving vane 119
Between gap when becoming smaller, the flow outwardly discharged in drainage section 107 will become smaller, and the flow of test section 105 will become
Greatly；When the gap between moving vane 119 becomes larger, the flow outwardly discharged in drainage section 107 will become larger, test section
105 flow will become smaller.By constantly adjusting the gap between moving vane 119, realizes and generated greatly at test section 105
The fitful wind of small variation.When shunting the closing of door 108, air-flow does not enter back into discharge, gust wind tunnel in drainage section 107 and is converted to routine
Wind speed blows formula wind-tunnel.
Embodiment 2:
The present embodiment is the difference from embodiment 1 is that drainage section 107 includes to communicate with shunting section 102 as illustrated in figures 7-11
Round corner section 214 and the windy sector 221 that communicates with the outside world, windy sector 221 214 connectivity part of round corner section is provided with several
The drainage fan being fixed in drainage section 107 controls the ventilation speed in drainage section 107 by the operation of drainage fan.Point
Stream door 108 passes through the hydraulic device 120 being arranged on 214 lateral wall of round corner section and is opened and closed.It is fixedly installed in windy sector 221
There are several fans, situation is as shown in Figure 9.By variable-frequency motor to the operation of fan in windy sector 221 come the row of control
The ventilation speed in section 107 is flowed, so that 105 wind speed of test section be made to generate size variation.
Blower drives the rotation of fan 109 to be able to generate air-flow when operation, and air-flow is along primary passageway stream through shunting section 102 and row
When flowing the diffluence pass 114 at 107 intercommunication of section, is controlled by hydraulic device 120 and shunt the opening of door 108 so that fraction enters row
Section 107 is flowed, since the power of fan 109 is fixed and invariable, the total flow passed through in shunting section 102 in main channel is fixed
, after drainage section 107 shunts a part of flow, the flow in test section 105 tails off, windy sector in drainage section 107
Flow when the drainage fans operation of 221 settings in drainage section 107 can generate variation (drainage fan for air-flow from drainage section
107 rows are outwardly), and then the flow in test section 105 can also generate variation, eventually generate wind speed size variation in test section
Fitful wind tried specifically, the flow outwardly discharged in drainage section 107 will become smaller when the operation of drainage fan low frequency
The flow for testing section 105 will become larger；When the operation of drainage fan high-frequency, the flow outwardly discharged in drainage section 107 is just
It can become larger, the flow of test section 105 will become smaller.It is adjusted by the frequency of drainage fan and realizes that generation is big at test section 105
The fitful wind of small variation.When shunting the closing of door 108, air-flow does not enter back into discharge, gust wind tunnel in drainage section 107 and is converted to routine
Wind speed blows formula wind-tunnel.
Multi-fan illustrates: can control simultaneously: the rotation speed by controlling blower fan group obtains the throughput of test section
To the change of height frequency.It can also successively control: the case where each row by controlling exhaust fan unit is run.As the row of the first row
Blower fan group operation start after successively run the second row, the third line until all exhaust fan units be all turned on, make in drainage section 107
Exhaust air rate is gradually increased, and the wind speed for making 106 air-flow of outlet diffusor section make test section while outwardly discharge amount gradually decreases produces
Raw size variation.Speed when running how much variations of quantity by exhaust fan unit is to change the speed of test section fitful wind size variation
Degree.For fan of the control mode of above-mentioned this multiple small fans compared to one relatively high power of exclusive use, it is easier to control
System, and starting and the response speed closed are faster, and the change rate of wind speed can achieve higher requirement, and control precision is higher.
Wind-tunnel overall length 60.5m, test section 2.5m*2m*16m (length), power section φ 5.1m*9.1m (length) bypass section
1.8m*4.5m*9m (length) (dibs angie type).
Claims (10)
1. a kind of blow formula gust wind tunnel with drainage section, including it is power section (101), shunting section (102), diffuser (103), steady
Fixed and contraction section (104), test section (105) and outlet diffuser (106), described power section (101) one end are connected to the external world, separately
One end connects shunting section (102), and shunting section (102) other end is connected to diffuser (103), diffuser (103) and stable and receipts
Contracting section (104) is connected to and is fixedly installed honeycomb parallel to each other (116) and damping screen (117) in connectivity part, stablizes and receives
Contracting section (104) other end is connect with test section (105), and test section (105) other end is connected to the outlet communicated with the outside world diffusion
Section (106), it is characterised in that: in order to guarantee the uniformity in flow field in main channel, several drainage sections (107) are additionally provided with,
Middle drainage section (107) one end is connect with shunting section (102), and the other end communicates with the outside world.
2. according to claim 1 blow formula gust wind tunnel with drainage section, it is characterised in that: the drainage section (107)
Junction with shunting section (102) is diffluence pass (114), is provided at diffluence pass (114) and shunts door (108).
3. according to claim 2 blow formula gust wind tunnel with drainage section, it is characterised in that: the drainage section (107)
In be provided with throttle valve (113).
4. according to claim 3 blow formula gust wind tunnel with drainage section, it is characterised in that: the throttle valve (113)
Including several moving vanes (119) and pod (118) are fixed, wherein fixed pod (118) are fixed at drainage section
(107) in, and moving vane (119) are connected on each fixed pod (118), two neighboring fixed pod
(118) moving vane (119) on can influence the blockage percentage of drainage section (107) by folding, to control main channel shunting
Enter the vent flow being outwardly discharged after drainage section (107), the control mode of the throttle valve (113) includes: regulation hydraulic system
In oil pressure so that drive the mechanical movement for being connected to the mechanical linkage of the throttle valve (113), realize and control the throttle valve
(113) folding.
5. according to claim 4 blow formula gust wind tunnel with drainage section, it is characterised in that: the shunting door (108)
It is opened and closed by the hydraulic device (120) being arranged on drainage section (107) lateral wall.
6. according to claim 2 blow formula gust wind tunnel with drainage section, it is characterised in that: the drainage section (107)
It include the round corner section (214) communicated with shunting section (102) and the windy sector (221) communicated with the outside world, windy sector (221)
Round corner section (214) connectivity part is provided with several drainage blowers being fixed in drainage section (107), each group blower is respectively configured
There is frequency-variable controller, the operation number of drainage blower fan is controlled by frequency-variable controller to control drainage section (107) interior air-flow
The outwardly velocity of discharge.
7. according to claim 6 blow formula gust wind tunnel with drainage section, it is characterised in that: the shunting door (108)
It is opened and closed by the hydraulic device (120) being arranged on round corner section (214) lateral wall.
8. according to claim 2 blow formula gust wind tunnel with drainage section, it is characterised in that: closed when shunting door (108)
When closing, drainage section (107) is out of service；When shunting door (108) unlatching, drainage section (107) brings into operation.
9. according to claim 1 blow formula gust wind tunnel with drainage section, it is characterised in that: the power section (101)
It is additionally provided with sequentially connected rear end blower cover (111), spin-ended (112), fan (109) and front end blower cover (110),
And rear end blower cover (111) is towards extraneous outlet section, and front end blower cover (110) is towards shunting section (102).
10. according to claim 1 blow formula direct current gust wind tunnel with drainage section, it is characterised in that: the drainage section
(107) it is arranged two groups, and is symmetrically disposed on the two sides or stabilization and contraction section (104) two sides of the power section (101).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225934.8A CN109799062B (en) | 2019-03-24 | 2019-03-24 | Blowing type wind-blowing wind tunnel with drainage section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225934.8A CN109799062B (en) | 2019-03-24 | 2019-03-24 | Blowing type wind-blowing wind tunnel with drainage section |
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| CN109799062B CN109799062B (en) | 2024-02-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188752A (en) * | 2021-06-11 | 2021-07-30 | 日照坤仑智能科技有限公司 | Unsteady vertical wind tunnel |
| 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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| CN209372360U (en) * | 2019-03-24 | 2019-09-10 | 国电环境保护研究院有限公司 | It is a kind of to blow formula gust wind tunnel with drainage section |
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| GB836385A (en) * | 1957-01-15 | 1960-06-01 | Metallbau Semler G M B H | Wind tunnel |
| US5435175A (en) * | 1991-11-29 | 1995-07-25 | Mercedes Benz Ag | Wind tunnel having a free jet test section for simulating wind direction fluctuations |
| CN104879276A (en) * | 2015-06-02 | 2015-09-02 | 李进福 | Air energy wind tunnel power generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN113188752B (en) * | 2021-06-11 | 2022-02-22 | 日照坤仑智能科技有限公司 | Unsteady vertical wind tunnel |
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| CN109799062B (en) | 2024-02-06 |
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