CN209198041U - A kind of direct current of band bypass blows formula gust wind tunnel - Google Patents
A kind of direct current of band bypass blows formula gust wind tunnel Download PDFInfo
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- CN209198041U CN209198041U CN201920180935.0U CN201920180935U CN209198041U CN 209198041 U CN209198041 U CN 209198041U CN 201920180935 U CN201920180935 U CN 201920180935U CN 209198041 U CN209198041 U CN 209198041U
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 230000000694 effects Effects 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 abstract description 4
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- 238000004088 simulation Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 11
- 230000000737 periodic effect Effects 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
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- 239000003344 environmental pollutant Substances 0.000 description 1
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The direct current that the embodiment of the present application discloses a kind of band bypass blows formula gust wind tunnel, comprising: sequentially connected power section, shunting section, diffuser, stabilization and contraction section, test section and outlet diffuser.Wherein, bypass section is provided with and communicated in power section, bypass section and power section connectivity part are provided with shunting door, shunt door in the on state, and the air-flow in power section can enter bypass section.Throttle valve is provided in bypass section, throttle valve carries out regular movement for controlling moving vane, bypass section blocking area is set to change, to control the flow that main channel airflow diversion enters in bypass section, reduce the throughput for entering main channel diffuser, so that the air velocity of test section is generated periodical size variation, forms the low frequency fitful wind similar with likelihood environment.Using the gust wind tunnel of the application, it can be realized and generate low-frequency fitful wind, it can be with the gust effect of wind of natural wind in simulation of atmospheric boundary layer, to study influence of the fitful wind to physical phenomenons various in atmospheric boundary layer.
Description
Technical Field
The application relates to the technical field of wind engineering, in particular to a direct-current blowing type gust wind tunnel with a bypass.
Background
Boundary layer wind tunnels play an increasingly important role in the research in the field of wind engineering. The boundary layer wind tunnel has the capability of simulating the flow of an atmospheric boundary layer, and can provide technical support for researching the diffusion rule of atmospheric pollutants and the safety design of a plurality of other unique structures such as large-span bridges, high-rise buildings, towers and the like.
The boundary layer wind tunnel can be divided into a blow-out wind tunnel and a suction wind tunnel according to the flowing direction of the air flow, wherein the blow-out wind tunnel takes the air flow blown out by a fan as a flowing medium of the wind tunnel; the suction wind tunnel sucks air into a low-pressure area formed by rotation of the fan blades to form airflow. The two types of wind tunnels have wide application range, but the specific application fields are different, and the suction type wind tunnel can only carry out non-sand-raising wind tunnel tests such as flow bypassing, flow field measurement and the like because the fan is arranged at the tail end of the tunnel body; the blow-out wind tunnel can not only carry out the non-blowing-out wind tunnel test, but also carry out the blowing-out tests of the starting wind speed, the sand conveying rate and the like of sand grains.
However, for some extreme meteorological events (such as gusts, hurricanes, etc.) where unsteady airflow dominates, ordinary boundary layer wind tunnels lack the ability to simulate the transient effects of these events. Therefore, there is a need for an atmospheric boundary layer wind tunnel that can produce a gust effect.
Turbulence in the atmosphere, the greater the turbulence scale in general, the lower the frequency of the turbulence; obstacles of larger dimensions produce a larger dimension of turbulence. The conventional atmospheric boundary layer wind tunnel generates turbulent flow through the wedges and the rough elements, and the generated turbulent flow has higher frequency because the scales of the wedges and the rough elements are about 0.1m generally. In actual atmosphere, because of the existence of obstacles with large scale such as tall buildings, hills, forests and the like, the energy of low-frequency parts in turbulence cannot be ignored, so that pulsating wind with large scale and low frequency is necessarily generated in the wind tunnel, and the wind tunnel can be more consistent with real atmosphere, which is the design significance of the wind tunnel for gust wind.
At present, an atmospheric boundary layer wind tunnel capable of generating a gust effect can also be called a gust wind tunnel, and a mechanical swing mechanism or a fan rotating speed is generally adopted to generate gust. However, gusts generated in this manner have a high gust frequency. The frequency of random gust in the atmospheric boundary layer is high or low, so that the conventional gust wind tunnel cannot completely simulate the random gust in the atmospheric boundary layer.
SUMMERY OF THE UTILITY MODEL
Based on the deficiencies of the prior art, the application provides a direct current blowing type gust wind tunnel with a bypass to realize that the generated frequency has high or low gust wind.
To solve the above problems, the following solutions are proposed:
a direct-current blowing type gust wind tunnel with a bypass comprises:
the dynamic section, the flow distribution section, the diffusion section, the stabilizing and contracting section, the test section and the outlet diffusion section are connected in sequence. Wherein:
the power section is communicated with a bypass section, a communication position of the bypass section and the power section is provided with a shunt door, and when the shunt door is in an open state, airflow in the power section can enter the bypass section. The power section is communicated with a bypass section, a communication position of the bypass section and the power section is provided with a shunt door, and when the shunt door is in an open state, airflow in the power section can enter the bypass section. A throttle valve is arranged in the bypass section, and the flow of the airflow entering the bypass section can be controlled by opening and closing the throttle valve, so that gusts are formed at the main channel.
Optionally, the number of the bypass sections is two, and the bypass sections are symmetrically arranged on two sides of the power section.
Optionally, the throttle valve comprises: the air guide device comprises a plurality of fixed air guide sleeves, wherein the end part of each fixed air guide sleeve is provided with a movable blade capable of opening and closing.
Optionally, the end of each fixed air guide sleeve is provided with a pair of openable movable blades.
Optionally, the throttle valve comprises 5 fixed fairings.
Optionally, the power section, the flow splitting section, the diffuser section, the stabilizing and contracting section, the test section, the outlet diffuser section, and the bypass section are all steel structures.
Optionally, the bypass section comprises: a front corner section and a rear corner section for communicating with the power section; and the bypass main section is communicated with the front corner section and the rear corner section and is coaxial with the power section. Wherein the throttle valve is disposed inside the bypass main section.
Optionally, the control method of the throttle valve includes: the oil pressure in the hydraulic system is regulated and controlled to further drive a mechanical connecting rod connected with the throttling valve to move mechanically, and the throttling valve is controlled to open and close.
Optionally, the control manner of the shunt gate includes: the oil pressure in the hydraulic system is regulated and controlled to further drive a mechanical connecting rod connected to the shunt door to move mechanically, and the shunt door is controlled to open and close.
The application discloses take direct current of bypass to blow formula gust wind-tunnel's main part includes: the device comprises a power section, a flow distribution section, a diffusion section, a stabilization and contraction section, a test section and an outlet diffusion section. The power section is provided with a bypass section which plays a role in shunting the air flow of the main channel. A shunt door is arranged at the communication position of the bypass section and the shunt section, and the shunt door rotates around an axis to realize opening and closing. The shunt door is under the open mode, the air current that produces in the power section has in some air current gets into the other highway section when the shunt door department of flowing through, be provided with the choke valve in the bypass section, be equipped with the movable blade that can open and shut on the choke valve, do periodic opening and shutting motion through the movable blade, make other highway section blocking area change, thereby the main entrance air current reposition of redundant personnel flow of control gets into the flow in the other highway section, reduce the air flow that gets into the main entrance diffuser section, make the air velocity of test section produce the periodic size change, form with the similar low frequency gust in the likelihood environment. Accordingly, most of the airflow that does not enter the bypass section continues to flow downstream of the splitter section, eventually converting the airflow into a low frequency gust of varying magnitude in the test section. Therefore, when the shunt door is in an open state, the gust wind tunnel provided by the application can generate low-frequency gusts with similar natural frequencies, so that random gusts in an atmospheric boundary layer can be truly simulated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic three-dimensional structure diagram of a direct-current blowing type wind gust wind tunnel with a bypass according to an embodiment of the present application;
FIG. 2 is a schematic three-dimensional structure diagram of a return portion of a bypass section according to an embodiment of the present application;
FIG. 3 is a schematic three-dimensional structure of a section of a return portion of a bypass section according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a two-dimensional structure of a bypass-equipped direct-current blowing gust wind tunnel according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a two-dimensional structure of a section of a return portion of a bypass section according to an embodiment of the present application;
FIG. 6 is a simplified schematic illustration of a closed throttle valve in a bypass section as disclosed in an embodiment of the present application;
FIG. 7 is a schematic illustration of the bypass in-range throttle valve opening configuration disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a direct-current blowing type gust wind tunnel with a bypass to achieve the purpose that gust wind with high or low frequency is generated.
Referring to fig. 1 and 4, a wind gust wind tunnel according to an embodiment of the present application includes:
the device comprises a power section 101, a flow dividing section 102, a diffusion section 103, a stabilizing and contracting section 104, a test section 105 and an outlet diffusion section 106 which are connected in sequence. Specifically, each independent functional section can form an integral wind tunnel through welding or screwing. Wherein, the power section 101 is provided with a bypass section 107 in a communicating manner, and a shunt door 108 is arranged at the communicating position of the bypass section 107 and the power section 101. Optionally, in order to ensure the structural stability of the wind gust wind tunnel, the power section 101, the flow dividing section 102, the diffuser section 103, the stabilizing and contracting section 104, the test section 105, the outlet diffuser section 106 and the bypass section 107 are all made of all-steel materials.
Referring to fig. 3, the power section 101 is provided with a fan cover, a variable frequency motor, a fan 109, and a rotation stopping sheet 112. The fan 109 is provided at the front end of the inverter motor. The fan housing is divided into a front fan housing 110 and a rear fan housing 111 depending on the position of the fan 109 and the direction of airflow. The inner side of the rear end fan cover 111 is provided with a variable frequency motor, and the outer side is provided with a rotation stopping sheet 112.
Referring to fig. 3, a shunt gate 108 disposed at a position where the bypass segment 107 communicates with the power segment 101 can rotate around an axis to open and close. Under the closing state of the diverter gate 108, the gust wind tunnel is a conventional constant velocity wind tunnel, that is, the airflow generated by the fan 109 in the power section 101 directly flows through the diverter section 102, the diffuser section 103, the stabilizing and contracting section 104, the test section 105 and the outlet expanding section 106, and the conventional constant velocity wind tunnel can only generate high-frequency gust by placing rough elements and wedges at the inlet of the test section based on the internal structural characteristics. When the diverter gate 108 is in the open state, the airflow generated by the fan 109 in the power section 101 passes through the diverter gate 108 into the bypass section 107. A throttle valve 113 is arranged in the bypass section 107, and the throttle valve changes the blocking area of the bypass section by adjusting the opening and closing degree of the movable blade, so that the flow of the main channel airflow flowing into the bypass section is controlled, the airflow flowing into the diffusion section of the main channel is reduced, the airflow speed of the test section generates periodic size change, and low-frequency gust similar to that in a likelihood environment is formed.
In the embodiment of the present application, the main body of the wind tunnel includes: the device comprises a power section, a flow distribution section, a diffusion section, a stabilization and contraction section, a test section and an outlet diffusion section. The power section is communicated with a bypass section, and the effect of shunting the air flow of the main channel is achieved. A shunt door is arranged at the communication position of the bypass section and the shunt section, and the shunt door rotates around an axis to realize opening and closing. When the shunt door is in an open state, when airflow generated in the power section flows through the shunt door, part of the airflow is shunted to enter the bypass section. Be provided with the choke valve in the bypass section, be equipped with the movable vane that can open and shut on the choke valve, make bypass section blocking area change through the regular motion that opens and shuts of movable vane to the main entrance air current reposition of redundant personnel gets into the flow in the bypass section, reduces the airflow that gets into the main entrance diffuser section, makes the air velocity of test section produce periodic size change, forms and similar low frequency gust in the likelihood environment. Accordingly, most of the airflow that does not enter the bypass section continues to flow downstream of the flow dividing section, and the flow field of the airflow is changed based on the internal structural characteristics of the downstream section, thereby converting the airflow into a gust of low frequency in the test section. Therefore, when the shunt door is in an open state, the gust wind tunnel provided by the application can generate low-frequency gust, so that random gust in an atmospheric boundary layer can be truly simulated.
When the conventional boundary layer wind tunnel runs, the motor drives the fan to rotate to generate airflow, and when the airflow passes through the rough element at the upstream of the test section, the rough element blocks the airflow to generate separation flow (namely turbulent flow). The rough elements are generally small in size (about 0.1m magnitude), so that the conventional boundary layer wind tunnel test section has high turbulence frequency and small integral scale. The turbulent flow frequency coverage range in the actual atmospheric boundary layer is wider, the turbulent flow which has higher frequency and smaller scale and is easy to dissipate and the turbulent flow which has lower frequency and larger scale and is difficult to dissipate are provided, the conventional boundary layer wind tunnel can only simulate the former, and the simulation effect of the latter is poorer. A conventional constant flow velocity wind tunnel belongs to a conventional boundary layer wind tunnel.
In order to solve the problem that a conventional boundary layer wind tunnel cannot well simulate low-frequency turbulence, the gust wind tunnel of the embodiment of the application is additionally provided with two bypass channels on the basis of the conventional boundary layer wind tunnel. The bypass channel is connected with the wind tunnel through a shunt door: when the diverter valve is closed, the gust wind tunnel is recovered to be a conventional boundary layer wind tunnel, and turbulence with higher frequency is generated through the rough elements and the wedges; when the diverter valve is opened, a part of the original air flow in the main channel of the wind tunnel flows into the bypass channel, so that the air flow of the main flow section is reduced, and the wind speed of the test section is correspondingly reduced. The larger the resistance of the bypass channel is, the smaller the flow of the gas entering the bypass channel is; the smaller the resistance of the bypass channel, the greater the amount of airflow into the bypass. In this application, set up the choke valve through hydraulic pressure coordinated control in the bypass, thereby the movable blade of choke valve afterbody can the periodic oscillation influence bypass passageway to the resistance of air current, and then produces the influence to the wind speed of test section. The periodic swing of the movable blade at the tail part of the throttle valve can be continuously adjusted, the maximum swing frequency can reach 0.3Hz, and accordingly 0.3Hz pulsating wind can be generated in the test section, and the pulsating wind is low-frequency turbulence. Accordingly, when the remaining gas flows downstream of the main channel, the flow field of the gas flow is changed due to the blocking effect of the coarse elements arranged upstream of the test section, thereby generating turbulence with a relatively high frequency. In summary, when the diverter gate is opened so that the bypass section is in the passage state, and the coarse element is arranged near the upstream of the test section, the gust wind tunnel can generate a wide turbulence spectrum containing low-frequency turbulence and high-frequency turbulence, and is closer to a real atmospheric boundary layer than a conventional boundary layer wind tunnel.
It should be noted that, because the gust wind tunnel provided by the present application is a direct current open wind tunnel, the wind is generated by accelerating the external static air into the tunnel through the rotation of the variable frequency motor, and is discharged from the air outlet after passing through the test section. The air flow divided by the bypass section has speed, when the dividing door is opened, the air flow in the bypass blows to the upstream of the variable frequency motor along the channel and is sucked, the acceleration load of the variable frequency motor on the static air can be reduced, and the energy-saving effect is achieved.
When the gust wind tunnel of the embodiment of the application operates, the variable frequency motor drives the fan to rotate so as to generate airflow, and when the airflow flows through the intercommunicating position between the bypass section and the shunting section along the main channel, the hydraulic system controls the shunting door to open through the linkage mechanism so that part of the airflow enters the bypass section. And the swing of a movable blade at the rear end of the throttle valve is controlled through hydraulic linkage to enable airflow to generate periodic change, so that the airflow flowing through a bypass section is controlled, and low-frequency gust is formed in a power section. Accordingly, the majority of the remaining airflow flows along the main channel towards the segment section where the coarse elements are arranged. Wherein the block section comprises a test section and a stabilization and compression section upstream of the test section. The convex rough elements change the smooth trend of the airflow, so that the airflow is converted into high-frequency gust. In addition, when the diverter valve is closed, the air flow does not re-enter the bypass section for circulation. The gust wind tunnel is converted into a conventional constant wind speed direct current blowing type wind tunnel. To sum up, this application controls the reposition of redundant personnel effect on other highway section through opening and shutting of reposition of redundant personnel door. The efficacy of a wind gust tunnel is essentially determined according to the shunting effect. When the flow divider door is opened, the gust wind tunnel is different from the conventional boundary layer wind tunnel, the low-frequency gust can be converted into the airflow by utilizing the adjusting action of the throttle valve in the bypass section, and the high-frequency gust can be converted into the airflow by utilizing the internal structure characteristics of the wind tunnel. Therefore, the gust wind tunnel provided by the application can generate low-frequency gust and high-frequency gust under the condition that the shunt door is opened to realize the shunt effect of the bypass section. When the diverter valve is closed, the gust wind tunnel is recovered to be a conventional constant wind speed direct-current blowing wind tunnel, and the conventional constant wind speed direct-current blowing wind tunnel can only generate high-frequency gust based on the blocking effect of coarse elements arranged in the conventional constant wind speed direct-current blowing wind tunnel.
It should be noted that the circulation loop designed in the bypass section is mainly aimed at saving energy. The air flow shunted by the bypass section has speed, when the shunt door is opened, the air flow in the bypass blows to the upstream of the variable frequency motor along the channel and is sucked, the acceleration load of the variable frequency motor on the static air can be reduced, and the energy-saving effect is achieved. In addition, the wind tunnel is a direct-current opening type wind tunnel, and the wind is generated by sucking external static air into the tunnel in an accelerating manner through the rotation of the variable frequency motor and then is discharged from the air outlet after passing through a test section.
Optionally, in order to ensure uniformity of the flow field in the main channel, two bypass sections 107 are provided and symmetrically provided on two sides of the power section 101, so that the bypass sections 107 on the two sides are divided uniformly, and the problem of poor uniformity of the flow field in the main channel caused by uneven distribution of the air flow is reduced.
Alternatively, in another embodiment of the present application, as shown in fig. 2 and 5, the bypass section 107 comprises: a corner front section 114, a bypass main section 115, a corner rear section 116. Wherein, the front corner section 114 and the rear corner section 116 are both used for communicating the power section 101. One end of the bypass main section 115 communicates with the front corner section 114, the other end communicates with the rear corner section 116, the bypass main section 115 is coaxial with the power section 101, and the throttle valve 113 is disposed inside the bypass main section 115.
Optionally, in another embodiment of the present application, as shown in fig. 3, a flow deflector 117 is disposed at each of the corner front section 114 and the corner rear section 116 for guiding the flow direction of the air flow, so as to reduce the energy loss of the air flow caused by the flow direction abrupt change. When the diverter door 108 is opened, the angled forward section 114 smoothly directs the diverted airflow into the bypass main section 115, thereby reducing airflow energy losses. The bypass main section 115 is axially parallel to the power section 101. By-passing the throttle valve 113 in the main section 115, the air flow velocity in the main channel is rapidly changed to generate gusts. The changing air flow then flows back into the power section 101 through the rear corner section 116 and forms a gust of wind.
Alternatively, in another embodiment of the present application, referring to fig. 6, the throttle valve 113 includes: a plurality of fixed fairings 118, wherein the end of each fixed fairing 118 is provided with a movable blade 119 that can be opened and closed.
Alternatively, the movable blades 119 provided at the end of each stationary shroud 118 may be a pair.
Optionally, the throttle valve includes 5 fixed fairings 118.
Alternatively, in another embodiment of the present application, referring to fig. 6 and 7, the control manner of the throttle valve 113 includes: the oil pressure in the hydraulic system is regulated to drive the mechanical link connected to the throttle valve 113 to mechanically move, which can control the closing of the movable vane 119 of the throttle valve 113 and the opening of the movable vane 119 of the throttle valve 113.
Optionally, in another embodiment of the present application, a control manner of the shunt gate 108 includes: the oil pressure in the hydraulic system is regulated and controlled to further drive the mechanical connecting rod connected to the shunt door 108 to move mechanically, so that the shunt door 108 is controlled to be opened and closed.
Alternatively, in another embodiment of the present application, the rotation stopping sheet 112 on the rear end fan cover 111 of the power section may be used as a support to support the inverter motor and the fan 109 and the rear end fan cover 111.
Optionally, the rear end fan guard 111 is provided with a plurality of rotation stopping tabs 112 on the outside and in the radial direction of the inverter motor.
Optionally, referring to fig. 4, in another embodiment of the present application, a constant radial section between the diffuser section 103 and the stabilizing and contracting section 104 is provided with a honeycomb 120 and a damping mesh 121 for rectifying the upstream unstable airflow into a small vortex airflow.
Optionally, in another embodiment of the present application, a hydraulic system for regulating the throttle valve 113 and the diverter valve 108 is installed outside the wind tunnel for gusts. And the control terminal of the hydraulic system is also positioned at the outer side of the gust wind tunnel. In addition, the control terminal can also control the rotating speed of the variable frequency motor in the power section 101 through the frequency converter.
Those skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (9)
1. The utility model provides a take direct current of bypass to blow formula gust wind-tunnel which characterized in that includes: the power section, the flow distribution section, the diffusion section, the stabilizing and contracting section, the test section and the outlet diffusion section are connected in sequence; wherein,
a bypass section is communicated with the power section, a diverter door is arranged at the communication position of the bypass section and the power section, and when the diverter door is in an open state, airflow in the power section can enter the bypass section; a throttle valve is arranged in the bypass section, and the flow of the airflow entering the bypass section can be controlled by opening and closing the throttle valve, so that gusts are formed at the main channel.
2. The wind tunnel according to claim 1, wherein the bypass sections comprise two bypass sections and are symmetrically arranged on two sides of the power section.
3. The wind gust tunnel of claim 1, wherein the throttle valve comprises: a plurality of stationary fairings; and the end part of each fixed air guide sleeve is provided with a movable blade which can be opened and closed.
4. The gust wind tunnel of claim 3, wherein a pair of movable blades which can be opened and closed are arranged at the end of each fixed air guide sleeve.
5. A gust wind tunnel according to claim 3, characterised in that the throttle valve comprises 5 fixed fairings.
6. The wind tunnel according to claim 1, wherein said power section, said splitter section, said diffuser section, said stabilizing and contracting section, said test section, said outlet diffuser section and said bypass section are all steel structures.
7. The wind gust tunnel of claim 1, wherein the bypass segment comprises:
a front corner section and a rear corner section for communicating with the power section;
the bypass main section is communicated with the front corner section and the rear corner section and is coaxial with the power section;
wherein the throttle valve is disposed inside the bypass main section.
8. A gust wind tunnel according to any of claims 1 to 7, characterised in that the control of the throttle valve comprises: the oil pressure in the hydraulic system is regulated and controlled to further drive a mechanical connecting rod connected with the throttling valve to move mechanically, and the throttling valve is controlled to open and close.
9. A gust wind tunnel according to any one of claims 1 to 7 wherein the diverter gate is controlled in a manner comprising: the oil pressure in the hydraulic system is regulated and controlled to further drive a mechanical connecting rod connected to the shunt door to move mechanically, and the shunt door is controlled to open and close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920180935.0U CN209198041U (en) | 2019-02-01 | 2019-02-01 | A kind of direct current of band bypass blows formula gust wind tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920180935.0U CN209198041U (en) | 2019-02-01 | 2019-02-01 | A kind of direct current of band bypass blows formula gust wind tunnel |
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| CN209198041U true CN209198041U (en) | 2019-08-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632244A (en) * | 2019-02-01 | 2019-04-16 | 国电环境保护研究院有限公司 | A kind of direct current of band bypass blows formula gust wind tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632244A (en) * | 2019-02-01 | 2019-04-16 | 国电环境保护研究院有限公司 | A kind of direct current of band bypass blows formula gust wind tunnel |
| CN109632244B (en) * | 2019-02-01 | 2024-02-06 | 国电环境保护研究院有限公司 | Direct-current blowing type wind-blowing wind tunnel with bypass |
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