CN212844277U - Downburst storm wind tunnel test wind field simulation device - Google Patents
Downburst storm wind tunnel test wind field simulation device Download PDFInfo
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- CN212844277U CN212844277U CN202021695643.XU CN202021695643U CN212844277U CN 212844277 U CN212844277 U CN 212844277U CN 202021695643 U CN202021695643 U CN 202021695643U CN 212844277 U CN212844277 U CN 212844277U
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Abstract
The utility model discloses a downdraft storm tunnel test wind field simulation device, which comprises a turbulence generation device consisting of gratings and rough elements, and the turbulence degree is changed by changing the number and the spacing of the gratings and the arrangement of the rough elements; the non-stationary transient characteristic of downburst is simulated by arranging a flow guide device; through setting up the wind field section and generating the device and simulate the perpendicular spatial distribution characteristic of downburst wind field, so, the utility model discloses a downburst wind tunnel test wind field analogue means combines torrent generation device and guiding device, simulates the time-varying characteristic of downburst wind speed, reunion wind field section generation device, can simulate the spatial distribution characteristic of downburst wind speed, and then can analyze the wind effect of building structure under the downburst effect.
Description
Technical Field
The utility model belongs to the technical field of the wind-tunnel simulation test, specific be a downblow storm wind tunnel test wind field analogue means.
Background
On the background of annual global climate deterioration, downburst storm disasters frequently occur, and serious damage is caused to structures such as buildings, public facilities, power transmission tower systems and the like within the action radius of the downburst storm disasters. The actual measurement result shows that the wind field characteristics of downburst and typhoon, tornado and other wind disasters are obviously different, so that the wind field simulation of the downburst in the wind tunnel test has a unique mode.
The physical simulation of the downburst in the wind engineering community is divided into two categories, one category is used for simulating the whole process of the development and change of the downburst, and the other category is used for simulating the outflow process of the downburst. In a conventional boundary layer wind tunnel, two main modes are provided for simulating a downburst outflow process, one mode is that a 'nose type' wind profile which changes along with the height is formed by generating extra wall wind speed at the bottom of the wind tunnel and assisting a guide plate at a joint by using a wall surface jet flow principle; the other method is that the principle that a guide plate changes the wind direction is utilized, horizontal airflow descends through a multi-wing grid device arranged at a test section between an air inlet and a turntable, and the wind speed at the turntable can be changed by adjusting the rotation angle of wings, so that the time course of the downburst outflow wind speed is simulated. The first device can generate downburst wind profiles, but cannot effectively simulate the time-varying characteristics of wind speed after downburst fully develops; the second device can simulate the time course of the downburst wind speed, but cannot effectively simulate the spatial distribution characteristics of the downburst. However, of greater concern to engineers is the wind effect that downstorm effects produce on building structures. Therefore, the method has more engineering significance for correctly simulating the time-varying characteristic and the space distribution characteristic of the downburst wind speed by an effective means so as to analyze the wind effect of the building structure.
Disclosure of Invention
In view of this, an object of the present invention is to provide a downburst wind tunnel test wind field simulation apparatus, which simulates the time-varying characteristic and the spatial distribution characteristic of the downburst wind speed.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a downburst storm wind tunnel test wind field analogue means, includes the wind-tunnel, be equipped with in the wind-tunnel in proper order:
a turbulence generating device comprising a grating and a roughness element;
the flow guide device is used for simulating the non-stationary transient characteristic of downburst;
the wind field profile generation device is used for simulating the vertical spatial distribution characteristic of a downdraft wind field;
the coarse element is positioned between the grating and the flow guide device.
Furthermore, a turntable device for mounting a component to be tested is further arranged in the wind tunnel, and the turntable device is positioned on one side of the wind field profile generating device, which is back to the flow guide device.
Furthermore, the grid comprises a plurality of vertical grid plates arranged at intervals and a plurality of horizontal grid plates arranged at intervals, and holes for air flow to pass through are formed between the vertical grid plates and the horizontal grid plates in an array mode.
Furthermore, the rough elements are arranged in at least two rows, each row comprises at least two rough elements, and the two adjacent rows of rough elements are arranged in a staggered manner.
Further, the flow guide device comprises two upright posts which are respectively positioned at two sides, a plurality of flow guide plates are arranged between the two upright posts at intervals, rotating shafts are arranged on the flow guide plates, the flow guide plates are arranged between the two upright posts in a rotating fit mode through the rotating shafts, and a rotation driving device for driving the flow guide plates to rotate around the rotating shafts is further arranged in the wind tunnel; the width of each guide plate is larger than or equal to the distance between the adjacent guide plates and the rotating shaft.
Further, the rotation driving device comprises a motor and a transmission shaft in transmission connection with an output shaft of the motor, and a worm gear mechanism or a helical gear transmission mechanism is arranged between each transmission shaft and each rotating shaft.
Further, the wind field profile generation device comprises a mixed flow fan and a jet flow channel connected with an air outlet of the mixed flow fan, the jet flow channel comprises a stable section, a rotary section and a jet flow outlet section, the rotary section is positioned between the stable section and the jet flow outlet section, a transition section is arranged between the air outlet of the mixed flow fan and the stable section for connection, and the bottom surface of the jet flow outlet section is flush with the bottom surface of the wind tunnel; the included angle between the air inlet direction and the air outlet direction of the rotary section is 180 degrees, the widths of the air inlet and the air outlet of the rotary section are equal to the width of the wind tunnel, the flow area of the air inlet of the rotary section is larger than that of the air outlet of the rotary section, and the flow area of the rotary section is gradually reduced along the airflow direction from the air inlet to the air outlet of the rotary section.
Furthermore, first flow guide groups are arranged in the stabilizing section at intervals, and each first flow guide group comprises a plurality of first flow guide sheets arranged at intervals in the width direction of the stabilizing section; a second flow guide group is arranged in the rotary section and comprises a plurality of second flow guide sheets arranged at intervals along the height direction of the rotary section; and a third guide vane group is arranged in the jet flow outlet section at intervals, and comprises a plurality of third guide vanes arranged along the width direction of the jet flow outlet section at intervals.
Furthermore, the third guide vane groups are arranged into two groups at intervals along the airflow direction of the jet flow outlet section, and a flow regulating mechanism for regulating the outlet airflow flow of the jet flow outlet section is arranged between the two groups of third guide vane groups; the flow regulating mechanism comprises a regulating plate hinged to the bottom surface of the jet flow outlet section and a regulating cylinder used for driving the regulating plate to rotate so as to regulate the flow area between the regulating plate and the top surface of the jet flow outlet section.
Furthermore, both ends of all the second guide vanes are located on the same plane, and an included angle between the plane and the airflow emergent direction of the jet flow outlet section is 60 degrees.
The beneficial effects of the utility model reside in that:
the utility model discloses a downdraft storm tunnel test wind field simulation device, which is provided with a turbulence generating device consisting of grids and rough elements, and changes the turbulence degree by changing the number and the spacing of the grids and the arrangement of the rough elements; the non-stationary transient characteristic of downburst is simulated by arranging a flow guide device; through setting up the wind field section and generating the device and simulate the perpendicular spatial distribution characteristic of downburst wind field, so, the utility model discloses a downburst wind tunnel test wind field analogue means combines torrent generation device and guiding device, simulates the time-varying characteristic of downburst wind speed, reunion wind field section generation device, can simulate the spatial distribution characteristic of downburst wind speed, and then can analyze the wind effect of building structure under the downburst effect.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is a schematic structural diagram of an embodiment of a downdraft wind tunnel test wind field simulation device of the present invention;
FIG. 2 is a schematic view of the structure of the grid;
FIG. 3 is a schematic view of the structure of the diversion device;
FIG. 4a is a schematic structural diagram of a wind field profile generating device;
FIG. 4b is a top view of FIG. 4 a;
description of reference numerals:
1-a wind tunnel; 2-a grid; 3-coarse element; 4-a flow guide device; 5-wind field profile generating means; 6-a turntable device; 7-vertical grating plates; 8-horizontal grid plates; 9-holes; 10-upright post; 11-a flow guide plate; 12-a rotating shaft; 13-a motor; 14-a drive shaft; 15-bevel gear drive; 16-mixed flow fan; 17-a stabilization section; 18-a turn section; 19-jet outlet section; 20-a transition section; 21-a first guide vane; 22-a second guide vane; 23-a third guide vane; 24-an adjusting plate; 25-adjusting the cylinder.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
As shown in fig. 1, it is a schematic structural diagram of an embodiment of the downdraft wind tunnel test wind field simulation device of the present invention. The downburst storm wind tunnel test wind field simulation device of this embodiment, including wind tunnel 1, be equipped with in the wind tunnel 1 in proper order: turbulence generating means comprising a grid 2 and coarse elements 3; the flow guide device 4 is used for simulating the non-stationary transient characteristic of downburst; and the wind field profile generating device 5 is used for simulating the vertical spatial distribution characteristic of the downdraft wind field. The coarse elements 3 of the present embodiment are located between the grid 2 and the flow guiding means 4. The wind tunnel 1 of the present embodiment is further provided with a turntable device 6 for mounting a component to be tested, and the turntable device 6 is located on a side of the wind field profile generating device 5 facing away from the flow guide device 4.
Further, grid 2 includes a plurality of vertical grid plates 7 that the interval set up and a plurality of horizontal grid plates 8 that the interval set up, and the array forms the hole 9 that is used for the air current to pass through between vertical grid plate 7 and the horizontal grid plate 8. The grating 2 of the present embodiment comprises 4 equally spaced vertical grating plates 7 and 5 equally spaced horizontal grating plates 8. The wind tunnel 1 of the embodiment has the dimensions of 15m long, 2.4m wide and 1.8m high, the vertical grid plates 7 have the dimensions of 30cm wide and 1.8m high, and the horizontal grid plates 8 have the dimensions of 15cm wide and 2m long. Specifically, the rough elements 3 are arranged in at least two rows, each row includes at least two rough elements 3, and two adjacent rows of rough elements 3 are arranged in a staggered manner. The rough elements 3 of this embodiment are arranged in 6 rows, and of the two adjacent rough elements 3, one row is provided with 6 rough elements, and the other row is provided with 5 rough elements. Of course, the size and arrangement of the grating 2 and the coarse elements 3 should be properly adjusted according to the requirements on the turbulence of the boundary layer wind field in the experimental process.
Further, the flow guiding device 4 comprises two upright posts 10 respectively positioned at two sides, a plurality of flow guiding plates 11 are arranged between the two upright posts 10 at intervals, a rotating shaft 12 is arranged on each flow guiding plate 11, the flow guiding plates 11 are arranged between the two upright posts 10 in a rotating fit manner through the rotating shaft 12, and a rotating driving device for driving the flow guiding plates 11 to rotate around the rotating shaft 12 is further arranged in the wind tunnel 1; the width of the guide plate 11 is larger than or equal to the distance between the two adjacent guide plates 11 and the rotating shaft 12. The width of the baffle 11 of the embodiment is equal to the distance between the rotating shafts 12 of two adjacent baffles 11. Specifically, the size of the guide plate is 30cm wide, 2m long and 1cm thick, that is, the distance between the rotating shafts 12 of two adjacent guide plates 11 is 30 cm. The rotation driving device of this embodiment includes a motor 13 and a transmission shaft 14 in transmission connection with an output shaft of the motor 13, a worm gear mechanism or a helical gear mechanism 15 is respectively disposed between the transmission shaft 14 and each of the rotating shafts 12, and a worm gear mechanism or a helical gear mechanism 15 is respectively disposed between the transmission shaft 14 and each of the rotating shafts 12. Preferably, the rotation driving devices are respectively provided with 2 corresponding to the two columns 10, and are used for synchronously driving the two ends of the guide plate 11 to rotate so as to prevent the rotation angles of the two ends of the guide plate 11 from deviating. Specifically, the rotation angle of the deflector 11 of the embodiment is-40 to 60 degrees by taking the deflector 11 parallel to the bottom surface of the wind tunnel 1 as an initial angle. The motor 13 of this embodiment adopts a step motor, and the step motor can provide a large torque to maintain the rotation angle position of the deflector 11, and further, the step motor can make the deflector 11 be located at the set angle position at a specific time point through the curve relationship between the preset time and the angle position of the deflector 11, thereby achieving the technical purpose of simulating the non-stationary transient characteristic of downburst.
Further, the wind field profile generating device 5 comprises a mixed flow fan 16 and a jet flow channel connected with an air outlet of the mixed flow fan 16, the jet flow channel comprises a stable section 17, a rotary section 18 and a jet flow outlet section 19, the rotary section 18 is positioned between the stable section 17 and the jet flow outlet section 19, a transition section 20 is arranged between the air outlet of the mixed flow fan 16 and the stable section 17 for connection, and the bottom surface of the jet flow outlet section 19 is flush with the bottom surface of the wind tunnel 1; the included angle between the air inlet direction and the air outlet direction of the rotary section 18 is 180 degrees, the widths of the air inlet and the air outlet of the rotary section 18 are equal to the width of the wind tunnel 1, the flow area of the air inlet of the rotary section 18 is larger than that of the air outlet of the rotary section, and the flow area of the rotary section 18 is gradually reduced along the airflow direction from the air inlet to the air outlet of the rotary section. Specifically, the mixed flow fans 16 of the present embodiment are provided with 3 mixed flow fans in parallel, and a transition section 20 is provided between the air outlet of each mixed flow fan 16 and the stabilizing section 17. The stabilizing section 17 of this embodiment is provided with a first flow guide group at intervals, and the first flow guide group includes a plurality of first flow guide vanes 21 arranged at intervals along the width direction of the stabilizing section 17. A second flow guide group is arranged in the rotary section 18 and comprises a plurality of second flow guide pieces 22 arranged at intervals along the height direction of the rotary section 18, two ends of all the second flow guide pieces 22 are positioned on the same plane, and an included angle between the plane and the airflow emergent direction of the jet flow outlet section 19 is 60 degrees. A third guide vane group is arranged in the jet flow outlet section 19 at intervals, and the third guide vane group comprises a plurality of third guide vanes 23 arranged at intervals along the width direction of the jet flow outlet section 19. Specifically, the third guide vane groups are arranged into two groups at intervals along the airflow direction of the jet flow outlet section 19, and a flow regulating mechanism for regulating the outlet airflow flow of the jet flow outlet section 19 is arranged between the two groups of third guide vane groups; the flow regulating mechanism comprises a regulating plate 24 which is hinged with the bottom surface of the jet flow outlet section 19 and a regulating cylinder 25 which is used for driving the regulating plate 24 to rotate so as to regulate the flow area between the regulating plate 24 and the top surface of the jet flow outlet section 19.
The mixed flow fan 16 in the wind field profile generating device of the embodiment has adjustable rotating speed so as to change the wall surface jet flow speed; the flow regulating mechanism at the joint changes the height of the inlet through the driving of the regulating cylinder to form semi-restricted jet flow so as to achieve the aim of simulating the vertical space distribution characteristic of the downdraft storm wind field.
The downdraft wind tunnel test wind field simulation device of the embodiment is provided with a turbulence generation device consisting of gratings and rough elements, and the turbulence degree is changed by changing the number and the spacing of the gratings and the arrangement of the rough elements; the non-stationary transient characteristic of downburst is simulated by arranging a flow guide device; through setting up the wind field section and generating the device and simulate the perpendicular spatial distribution characteristic of downburst wind field, so, the utility model discloses a downburst wind tunnel test wind field analogue means combines torrent generation device and guiding device, simulates the time-varying characteristic of downburst wind speed, reunion wind field section generation device, can simulate the spatial distribution characteristic of downburst wind speed, and then can analyze the wind effect of building structure under the downburst effect.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (10)
1. The utility model provides a downburst wind tunnel test wind field analogue means which characterized in that: including wind-tunnel (1), be equipped with in wind-tunnel (1) in proper order:
turbulence generating means comprising a grid (2) and coarse elements (3);
the flow guide device (4) is used for simulating the non-stationary transient characteristic of downburst;
the wind field profile generating device (5) is used for simulating the vertical spatial distribution characteristic of the downdraft wind field;
the rough element (3) is positioned between the grating (2) and the flow guide device (4).
2. The downdraft wind tunnel test wind field simulation device of claim 1, wherein: the wind tunnel (1) is also internally provided with a turntable device (6) for mounting a component to be tested, and the turntable device (6) is positioned on one side of the wind field profile generating device (5) back to the flow guide device (4).
3. The downdraft wind tunnel test wind field simulation device of claim 1, wherein: grid (2) are including a plurality of vertical grid boards (7) that the interval set up and a plurality of horizontal grid board (8) that the interval set up, and the array forms hole (9) that are used for the air current to pass through between vertical grid board (7) and horizontal grid board (8).
4. The downdraft wind tunnel test wind field simulation device of claim 1, wherein: the rough elements (3) are arranged in at least two rows, each row comprises at least two rough elements (3), and the two adjacent rows of rough elements (3) are arranged in a staggered manner.
5. The downdraft wind tunnel test wind field simulation device of claim 1, wherein: the flow guide device (4) comprises two upright posts (10) which are respectively positioned at two sides, a plurality of flow guide plates (11) are arranged between the two upright posts (10) at intervals, rotating shafts (12) are arranged on the flow guide plates (11), the flow guide plates (11) are arranged between the two upright posts (10) through the rotating shafts (12) in a rotating fit mode, and a rotation driving device for driving the flow guide plates (11) to rotate around the rotating shafts (12) is further arranged in the wind tunnel (1); the width of each guide plate (11) is larger than or equal to the distance between the adjacent guide plates (11) and the rotating shafts (12).
6. The downdraft wind tunnel test wind field simulation device of claim 5, wherein: the rotation driving device comprises a motor (13) and transmission shafts (14) in transmission connection with output shafts of the motor (13), and a worm gear mechanism or a helical gear transmission mechanism (15) is arranged between each transmission shaft (14) and each rotating shaft (12).
7. The downdraft wind tunnel test wind field simulation device of claim 1, wherein: the wind field profile generating device (5) comprises a mixed flow fan (16) and a jet flow channel connected with an air outlet of the mixed flow fan (16), the jet flow channel comprises a stabilizing section (17), a rotating section (18) and a jet flow outlet section (19), the rotating section (18) is positioned between the stabilizing section (17) and the jet flow outlet section (19), a transition section (20) is arranged between the air outlet of the mixed flow fan (16) and the stabilizing section (17) to be connected, and the bottom surface of the jet flow outlet section (19) is flush with the bottom surface of the wind tunnel (1); the included angle between the air inlet direction and the air outlet direction of the rotary section (18) is 180 degrees, the widths of the air inlet and the air outlet of the rotary section (18) are equal to the width of the wind tunnel (1), the flow area of the air inlet of the rotary section (18) is larger than that of the air outlet of the rotary section, and the flow area of the rotary section (18) is gradually reduced along the airflow direction from the air inlet to the air outlet of the rotary section.
8. The downdraft wind tunnel test wind field simulation device of claim 7, wherein: first flow guide groups are arranged in the stabilizing section (17) at intervals, and each first flow guide group comprises a plurality of first flow guide sheets (21) which are arranged at intervals along the width direction of the stabilizing section (17); a second flow guide group is arranged in the rotary section (18), and the second flow guide group comprises a plurality of second flow guide sheets (22) which are arranged at intervals along the height direction of the rotary section (18); the jet flow outlet section (19) is internally provided with a third guide vane group at intervals, and the third guide vane group comprises a plurality of third guide vanes (23) which are arranged at intervals along the width direction of the jet flow outlet section (19).
9. The downdraft wind tunnel test wind field simulation device of claim 8, wherein: the third guide vane groups are arranged into two groups at intervals along the airflow direction of the jet flow outlet section (19), and a flow regulating mechanism for regulating the outlet airflow flow of the jet flow outlet section (19) is arranged between the two groups of third guide vane groups; the flow regulating mechanism comprises a regulating plate (24) connected with the bottom surface of the jet flow outlet section (19) in a hinged mode and a regulating cylinder (25) used for driving the regulating plate (24) to rotate so as to regulate the flow area between the regulating plate (24) and the top surface of the jet flow outlet section (19).
10. The downdraft wind tunnel test wind field simulation device of claim 8, wherein: both ends of all the second flow deflectors (22) are positioned on the same plane, and the included angle between the plane and the airflow emergent direction of the jet flow outlet section (19) is 60 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021695643.XU CN212844277U (en) | 2020-08-14 | 2020-08-14 | Downburst storm wind tunnel test wind field simulation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021695643.XU CN212844277U (en) | 2020-08-14 | 2020-08-14 | Downburst storm wind tunnel test wind field simulation device |
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| CN202021695643.XU Expired - Fee Related CN212844277U (en) | 2020-08-14 | 2020-08-14 | Downburst storm wind tunnel test wind field simulation device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113361212A (en) * | 2021-06-02 | 2021-09-07 | 重庆科技学院 | Power transmission tower downwind direction response frequency domain analysis method under downburst storm effect |
| CN113701983A (en) * | 2021-10-11 | 2021-11-26 | 中国辐射防护研究院 | Device applied to temperature field simulation in environmental wind tunnel |
| CN113983546A (en) * | 2021-09-23 | 2022-01-28 | 重庆大学 | Individualized ventilation end device of shape body adaptability is restrainted to little wind of stranded |
| CN114894426A (en) * | 2022-07-13 | 2022-08-12 | 石家庄铁道大学 | Shear flow generation system with adjustable shear rate and shear flow adjustment method |
| CN115436008A (en) * | 2022-10-20 | 2022-12-06 | 国网甘肃省电力公司电力科学研究院 | Device and method for simulating low-altitude rapid flow pulsating wind field |
| CN115468731A (en) * | 2022-08-30 | 2022-12-13 | 西南交通大学 | Device for simulating non-stable wind field based on air volume adjustment |
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2020
- 2020-08-14 CN CN202021695643.XU patent/CN212844277U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113361212A (en) * | 2021-06-02 | 2021-09-07 | 重庆科技学院 | Power transmission tower downwind direction response frequency domain analysis method under downburst storm effect |
| CN113983546A (en) * | 2021-09-23 | 2022-01-28 | 重庆大学 | Individualized ventilation end device of shape body adaptability is restrainted to little wind of stranded |
| CN113983546B (en) * | 2021-09-23 | 2024-01-16 | 重庆大学 | Multi-strand small wind beam body adaptive personalized ventilation terminal device |
| CN113701983A (en) * | 2021-10-11 | 2021-11-26 | 中国辐射防护研究院 | Device applied to temperature field simulation in environmental wind tunnel |
| CN113701983B (en) * | 2021-10-11 | 2023-11-03 | 中国辐射防护研究院 | Device applied to temperature field simulation in environmental wind tunnel |
| CN114894426A (en) * | 2022-07-13 | 2022-08-12 | 石家庄铁道大学 | Shear flow generation system with adjustable shear rate and shear flow adjustment method |
| CN114894426B (en) * | 2022-07-13 | 2022-09-13 | 石家庄铁道大学 | Shear flow generation system with adjustable shear rate and shear flow adjusting method |
| CN115468731A (en) * | 2022-08-30 | 2022-12-13 | 西南交通大学 | Device for simulating non-stable wind field based on air volume adjustment |
| CN115436008A (en) * | 2022-10-20 | 2022-12-06 | 国网甘肃省电力公司电力科学研究院 | Device and method for simulating low-altitude rapid flow pulsating wind field |
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