Parameter-adjustable turbulence generating device

Abstract

The invention provides a turbulent flow generating device with adjustable parameters, which comprises a plurality of generating units arranged in sequence, and each generating unit comprises a lifting base, a mounting plate, an adjusting unit and a wind shielding unit. The mounting plate is arranged on the lifting base, and a plurality of mounting holes are formed in the mounting plate; a plurality of adjusting units are arranged, and the adjusting units are in one-to-one correspondence with the mounting holes; each adjusting unit is used for forming a central ventilation opening in the corresponding mounting hole and adjusting the opening degree of the central ventilation opening; the wind shielding unit comprises a plurality of blocking structures, and the blocking structures correspond to the mounting holes one to one; the blocking structures are used for forming annular ventilation openings with the corresponding mounting holes and adjusting the opening degrees of the annular ventilation openings. The invention provides a turbulent flow generating device with adjustable parameters, and aims to solve the problem that in the prior art, turbulent flow field parameters are inflexible to adjust in the turbulent flow field simulation process.

Description

Technical Field

[0001] This invention belongs to the field of fluid mechanics experimental technology, specifically relating to a turbulence generator with adjustable parameters. Background Technology

[0002] In real life, the effect of wind on various building structures is not simply a static effect; its dynamic effect on building structures is equally significant. This necessitates a deeper understanding and research into the pulsating characteristics of wind. To simulate turbulent fields more closely resembling natural wind in wind tunnel laboratories, commonly used techniques include passive simulation and active simulation.

[0003] In existing technologies, the principle of active simulation methods is to use controllable active disturbance devices to interfere with the main airflow in a wind tunnel. By providing additional energy to the turbulence, the mean wind profile and turbulence intensity are independently altered within a certain range, thereby achieving simulation. Active simulation devices are mainly used in relatively small wind tunnels. When the wind tunnel is large, its outlet position needs to be raised to accommodate this, but current methods only involve raising the wind by padding, and lateral installation is also required, which is quite difficult. The principle of passive simulation methods is to use specific devices to block the wind field to varying degrees, creating a shear layer in the wind speed and converting a small amount of kinetic energy into turbulent pulsating energy, thereby achieving simulation. Currently, passive simulation devices commonly use grid strips. These are constructed using grid strips of different widths. Adjusting parameters requires changing the position and number of grid strips, which is cumbersome, time-consuming, and labor-intensive. The inflexible parameter adjustment leads to low experimental efficiency and poor practicality. Summary of the Invention

[0004] This invention provides an adjustable turbulence generator, which aims to solve the problem of inflexible adjustment of turbulence field parameters in the process of simulating turbulence fields in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an adjustable parameter turbulence generator, comprising a plurality of generation units arranged in sequence; each generation unit includes: Lifting base; A mounting plate is provided on the lifting base, and the mounting plate is provided with a plurality of mounting holes arranged at intervals along the vertical direction; The system includes multiple adjustment units, each corresponding to a specific mounting hole. Each adjustment unit is mounted on the mounting plate and is used to form a central vent in the corresponding mounting hole and to adjust the opening of the central vent. The windbreak unit is detachably connected to the mounting plate and includes a sealing structure. Multiple sealing structures are provided, and each sealing structure corresponds to a mounting hole. The sealing structure is used to form an annular vent with the corresponding mounting hole and to adjust the opening of the annular vent. The adjustment unit is combined with the mounting plate to provide passive simulation; when the opening of the central vent is at its maximum, the windbreak unit is connected to the mounting plate to provide active simulation.

[0006] In one possible implementation, each of the adjustment units includes: The first plate body is provided in two, with the two first plate bodies arranged at intervals, and the two first plate bodies are respectively arranged on both sides of the corresponding mounting hole; The adjustment structure is provided in two parts, each of which corresponds to one of the two first plates. The two adjustment structures are used to adjust the interval between the two first plates. The second plate is slidably disposed in the corresponding mounting hole in the vertical direction. The second plate is located between the two first plates and is connected to the two adjustment structures. The central ventilation opening is formed by the two first plates, the second plate, and the upper inner wall of the mounting hole.

[0007] In one possible implementation, each of the adjustment structures includes: The first connecting rod has one end slidably connected to the corresponding first plate in the vertical direction, and the other end is provided with a first slider; The second connecting rod has one end connected to the second plate and the other end provided with a second slider; the second connecting rod is hinged to the first connecting rod.

[0008] In one possible implementation, the adjustable parameter turbulence generator further includes two drive components, each corresponding to one of the two adjustment structures of each adjustment unit; each drive component includes: A drive motor is mounted on the lifting base. The drive motor has two power output ends, and the two power output ends rotate in opposite directions. The first lead screw has one end connected to one of the power output ends, and the other end extends vertically and is threadedly connected to each of the corresponding first sliders. The second lead screw has one end connected to another of the aforementioned power output ends, and the other end extends vertically and is threadedly connected to each of the corresponding second sliders. Each of the first sliders is provided with a first through hole for the second lead screw to pass through, and each of the second sliders is provided with a second through hole for the first lead screw to pass through.

[0009] In one possible implementation, each of the first plates includes: The side panel body is positioned above the second panel. The enclosure body is provided in two parts, and the two enclosure bodies abut against the two side edges of the two side panels respectively. The two enclosure bodies are respectively disposed on both sides of the second panel. The first spool is located at the bottom end of the side plate body and is used for winding the side plate body. There are two second scrolls, each corresponding to one of the two enclosure panels. Each second scroll is arranged in a vertical direction, and the two second scrolls are used to wind the corresponding enclosure panel. The second connecting rod has a bracket at one end connected to the second plate for rotatably connecting to the first reel; the second reel is rotatably mounted on the mounting plate.

[0010] In one possible implementation, the adjustment unit further includes: Two auxiliary plates are provided, and the two auxiliary plates are respectively connected to both sides of the second plate. There are two third rollers, each corresponding to one of the two auxiliary plates. The two third rollers are rotatably mounted on the mounting plate, and each third roller is used to wind the corresponding auxiliary plate.

[0011] In one possible implementation, the windbreak unit further includes: The mounting shaft is arranged vertically and is detachably connected to the mounting plate; the mounting shaft is used for mounting each of the sealing structures. The fasteners are provided in multiple parts, each fastener corresponding to each of the sealing structures, and each fastener and the corresponding sealing structure are detachably connected for fixing each sealing structure.

[0012] In one possible implementation, each of the sealing structures includes two baffles arranged at an included angle, the two baffles being rotatably connected to the mounting shaft.

[0013] In one possible implementation, the adjustable turbulence generator further includes a vibration device connected to the windbreak unit for driving the windbreak unit to vibrate.

[0014] In one possible implementation, the adjustable turbulence generator further includes a plurality of contour adjustment members for adjusting the edge smoothness of each of the sealing structures, each contour adjustment member being detachably connected to each of the sealing structures; each contour adjustment member includes: The substrate is detachably connected to the corresponding baffle. The substrate has multiple bumps, and each bump is arranged sequentially on the substrate along the length direction of the substrate.

[0015] The beneficial effects of the adjustable-parameter turbulence generator provided by this invention are as follows: Compared with the prior art, by setting up multiple generation units arranged in sequence, each generation unit independently includes a lifting base, a mounting plate, an adjustment unit, and a windbreak unit, which can be flexibly spliced ​​according to the size of the wind tunnel to adapt to different wind tunnel scenarios. The mounting plate is set on the lifting base, so that the lifting base can drive the mounting plate to move in the vertical direction to adjust the height of the mounting plate so that the top of the mounting plate abuts against the top of the wind tunnel. The lifting base can directly adjust the height of the mounting plate, eliminating the need for the shimming operation of traditional active simulation devices. Combined with the splicing design of multiple generation units, horizontal supplementary installation is more convenient, which can adapt to both small and large wind tunnels, and meet the installation requirements of wind tunnels of different sizes, greatly reducing the difficulty of adapting to wind tunnels of different sizes.

[0016] The mounting plate has multiple mounting holes, spaced vertically. Multiple adjustment units are provided, each corresponding to one of the mounting holes. Each adjustment unit is mounted on the mounting plate and forms a central vent in its corresponding mounting hole, adjusting the opening of the central vent. The adjustment units are combined with the mounting plate for passive simulation. A windbreak unit is detachably connected to the mounting plate. The windbreak unit includes multiple sealing structures, each corresponding to one of the mounting holes. The sealing structures form annular vents with their corresponding mounting holes, adjusting the opening of the annular vents. When the central vent opening is at its maximum, the windbreak unit connects to the mounting plate for active simulation.

[0017] Without the need to disassemble or replace the grid bars, the opening of the central vent and the annular vent can be adjusted separately via the adjustment unit and the windbreak unit, enabling flexible control of turbulence parameters. This avoids the cumbersome operation of disassembling and assembling the grid in traditional passive simulation devices, reducing manpower and time costs and improving experimental debugging efficiency. The same device can switch between active and passive simulation modes without the need for two additional sets of equipment. It retains the structural simplicity of passive simulation while possessing the energy replenishment advantage of active simulation, adapting to different turbulence field simulation needs and expanding the application scenarios of the device. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of an adjustable-parameter turbulence generator provided in an embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of an adjustable-parameter turbulence generator provided in an embodiment of the present invention. Figure 2 ; Figure 3 A schematic diagram of the cooperation structure between the mounting plate and the adjustment unit of an adjustable parameter turbulence generator provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the adjustment unit structure of an adjustable parameter turbulence generator provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 A schematic diagram of the cooperation structure between the adjustment unit and the drive component of an adjustable parameter turbulence generator provided in an embodiment of the present invention; Figure 7 A schematic diagram illustrating the cooperation between a mounting plate and a windbreak unit for an adjustable-parameter turbulence generator according to an embodiment of the present invention. Figure 1 ; Figure 8 A schematic diagram illustrating the cooperation between a mounting plate and a windbreak unit for an adjustable-parameter turbulence generator according to an embodiment of the present invention. Figure 2 ; Figure 9 A schematic diagram of the cooperation structure between the profile adjustment component and the baffle of an adjustable parameter turbulence generator provided in an embodiment of the present invention; Figure 10 A schematic diagram of the profile adjustment component of an adjustable turbulence generator provided in an embodiment of the present invention. Figure 1 ; Figure 11 A schematic diagram of the profile adjustment component of an adjustable turbulence generator provided in an embodiment of the present invention. Figure 2 .

[0019] Explanation of reference numerals in the attached figures: 10. Mounting plate; 11. Central vent; 12. Slot; 20. Adjustment unit; 21. First plate; 211. Side plate body; 212. Enclosure body; 213. First roller; 214. Second roller; 22. Adjustment structure; 221. First connecting rod; 222. First slider; 223. Second connecting rod; 224. Second slider; 23. Second plate; 24. Bracket; 25. Auxiliary plate; 26. Third roller; 30. Windbreak unit; 31. Mounting shaft; 32. Vibration device; 33. Baffle; 40. Contour adjustment component; 41. Base plate; 42. Protrusion; 50. Lifting base; 60. Drive assembly; 61. Drive motor; 62. First lead screw; 63. Second lead screw. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0024] Please refer to the following: Figures 1 to 11The present invention provides an adjustable-parameter turbulence generator. This adjustable-parameter turbulence generator includes multiple sequentially arranged generating units. Each generating unit includes a lifting base 50, a mounting plate 10, an adjusting unit 20, and a wind-blocking unit 30. The mounting plate 10 is mounted on the lifting base 50 and has multiple vertically spaced mounting holes. Multiple adjusting units 20 are provided, each corresponding to a mounting hole. Each adjusting unit 20 is mounted on the mounting plate 10 and forms a central vent 11 in the corresponding mounting hole, adjusting the opening degree of the central vent 11. The wind-blocking unit 30 is detachably connected to the mounting plate 10. The wind-blocking unit 30 includes multiple sealing structures, each corresponding to a mounting hole. The sealing structures form an annular vent with the corresponding mounting hole and adjust the opening degree of the annular vent. The adjustment unit 20 is combined with the mounting plate 10 to provide passive simulation. When the central vent 11 is at its maximum opening, the windbreak unit 30 is connected to the mounting plate 10 to provide active simulation.

[0025] In this embodiment, the mounting plate 10 is mounted on the lifting base 50, allowing the lifting base 50 to move the mounting plate 10 vertically to adjust its height so that its top end abuts against the top end of the wind tunnel. The mounting plate 10 has multiple mounting holes spaced vertically. Multiple adjustment units 20 are provided, each corresponding to one of the mounting holes. Each adjustment unit 20 is mounted on the mounting plate 10 and forms a central vent 11 in the corresponding mounting hole, adjusting the opening of the central vent 11. A windbreak unit 30 is detachably connected to the mounting plate 10. The windbreak unit 30 includes multiple sealing structures, each corresponding to one of the mounting holes. The sealing structures form an annular vent with the corresponding mounting hole and adjust the opening of the annular vent. The adjustment unit 20 and the mounting plate 10 are combined for passive simulation. When the central vent 11 is at its maximum opening, the windbreak unit 30 is connected to the mounting plate 10 to serve as an active simulation.

[0026] This invention provides an adjustable-parameter turbulence generator. Compared with existing technologies, it features multiple sequentially arranged generating units, each independently comprising a lifting base 50, a mounting plate 10, an adjustment unit 20, and a windbreak unit 30. These units can be flexibly assembled according to the wind tunnel size to adapt to different wind tunnel scenarios. The mounting plate 10 is mounted on the lifting base 50, allowing the lifting base 50 to move the mounting plate 10 vertically to adjust its height, ensuring the top of the mounting plate 10 abuts against the top of the wind tunnel. The lifting base 50 directly adjusts the height of the mounting plate 10, eliminating the need for the traditional height adjustment operation of active simulation devices. Combined with the multi-generating-unit splicing design, lateral installation is more convenient, adapting to both small and large wind tunnels and significantly reducing the difficulty of adapting to different wind tunnel specifications.

[0027] The mounting plate 10 has multiple mounting holes, which are spaced vertically. Multiple adjustment units 20 are provided, each corresponding to one of the mounting holes. Each adjustment unit 20 is mounted on the mounting plate 10 and forms a central vent 11 in the corresponding mounting hole, adjusting the opening of the central vent 11. The adjustment unit 20 is combined with the mounting plate 10 for passive simulation. The windbreak unit 30 is detachably connected to the mounting plate 10. The windbreak unit 30 includes multiple sealing structures, each corresponding to one of the mounting holes. The sealing structures form an annular vent with the corresponding mounting hole and adjust the opening of the annular vent. When the central vent 11 is at its maximum opening, the windbreak unit 30 connects to the mounting plate 10 for active simulation.

[0028] Without disassembling or replacing the grid strips, the opening of the central vent 11 and the annular vent can be adjusted separately via the adjustment unit 20 and the windbreak unit 30, enabling flexible control of turbulence parameters. This avoids the cumbersome operation of disassembling and assembling the grid in traditional passive simulation devices, reducing manpower and time costs and improving experimental debugging efficiency. The same device can switch between active and passive simulation modes without the need for two additional sets of equipment. It retains the structural simplicity of passive simulation while possessing the energy replenishment advantage of active simulation, adapting to different turbulence field simulation needs and expanding the application scenarios of the device.

[0029] Specifically, the lifting base 50 can be a scissor lift structure, a telescopic sleeve lift structure, etc., and existing technologies can be used.

[0030] In some embodiments, please refer to Figures 3 to 6Each adjustment unit 20 includes a first plate 21, an adjustment structure 22, and a second plate 23. Two first plates 21 are provided, spaced apart, and respectively positioned on either side of a corresponding mounting hole. Two adjustment structures 22 are provided, each corresponding to one of the two first plates 21, and are used to adjust the interval between the two first plates 21. The second plate 23 is slidably disposed vertically in a corresponding mounting hole, located between the two first plates 21 and connected to the two adjustment structures 22. The two first plates 21, the second plate 23, and the upper inner wall of the mounting hole together form a central ventilation opening 11.

[0031] In this embodiment, each adjustment unit 20 includes two sets of symmetrically arranged first plates 21, adjustment structures 22, and a second plate 23. The two first plates 21 are spaced apart and located on both sides of the mounting hole, forming the lateral boundary base of the central vent 11. The two adjustment structures 22 correspond one-to-one with the two first plates 21, and are used to drive the two first plates 21 to move towards or away from each other to adjust the interval between them. The second plate 23 is slidably disposed in the mounting hole along the vertical direction, located between the two first plates 21, and connected to the adjustment structures 22 on both sides, forming the vertical adjustment component of the central vent 11. The two first plates 21, the second plate 23, and the upper inner wall of the mounting hole enclose and form the central vent 11.

[0032] The adjustment structure 22 drives the two first plates 21 to move towards or away from each other, changing the lateral width of the vent; the second plate 23 slides vertically, changing the vertical height of the vent. Through coordinated lateral and vertical adjustment, precise and flexible control of the opening of the central vent 11 is achieved. When the adjustment unit 20 is combined with the mounting plate 10 alone, the degree of airflow blockage is changed by adjusting the opening of the central vent 11, achieving passive simulation. When the opening of the central vent 11 is adjusted to its maximum, the windbreak unit 30 is assembled to form an annular vent, switching to active simulation.

[0033] In some embodiments, please refer to Figure 4Each adjustment structure 22 includes a first connecting rod 221 and a second connecting rod 223. One end of the first connecting rod 221 is slidably connected to the corresponding first plate 21 in the vertical direction, and the other end is provided with a first slider 222. One end of the second connecting rod 223 is connected to the second plate 23, and the other end is provided with a second slider 224. The second connecting rod 223 is hinged to the first connecting rod 221. In this embodiment, when the first slider 222 or the second slider 224 moves, the hinged first connecting rod 221 and second connecting rod 223 will deflect at an angle, thereby causing the first plate 21 and the second plate 23 to move, thereby adjusting the lateral distance between the two first plates 21 and the vertical height of the second plate 23, realizing the control of the lateral width and vertical height of the central vent 11. The horizontal displacement of the first plate 21 and the vertical displacement of the second plate 23 are linked by the slider drive, eliminating the need for separate independent control of the first plate 21 and the second plate 23. This simplifies the parameter adjustment process, shortens the experimental debugging time, and improves experimental efficiency.

[0034] In some embodiments, please refer to Figure 6 The adjustable-parameter turbulence generator provided in this embodiment of the invention further includes two drive components 60, which correspond to the two adjustment structures 22 of each adjustment unit 20. Each drive component 60 includes a drive motor 61, a first lead screw 62, and a second lead screw 63. The drive motor 61 is mounted on the lifting base 50 and has two power output ends with opposite rotation directions. One end of the first lead screw 62 is connected to one of the power output ends, and the other end extends vertically and is threadedly connected to the corresponding first slider 222. One end of the second lead screw 63 is connected to the other power output end, and the other end extends vertically and is threadedly connected to the corresponding second slider 224. Each first slider 222 has a first through hole for the second lead screw 63 to pass through, and each second slider 224 has a second through hole for the first lead screw 62 to pass through.

[0035] In this embodiment, the two drive components 60 correspond one-to-one with the two adjustment structures 22 of each adjustment unit 20, ensuring that each adjustment structure 22 can obtain independent and synchronous power input, and guaranteeing the consistency of movement on both sides of the adjustment unit 20. Each drive component 60 consists of a drive motor 61, a first lead screw 62, and a second lead screw 63. The drive motor 61 has two power output terminals with opposite rotation directions, which are respectively connected to the first lead screw 62 and the second lead screw 63, and can simultaneously drive the first lead screw 62 and the second lead screw 63 to rotate in opposite directions. The first lead screw 62 extends vertically and forms a threaded transmission connection with the first slider 222 of each corresponding adjustment structure 22. The second lead screw 63 also extends vertically and forms a threaded transmission connection with the second slider 224 of each corresponding adjustment structure 22. Thus, the first lead screw 62 and the second lead screw 63, which rotate in opposite directions, will drive the first slider 222 and the second slider 224 to move vertically towards or away from each other. Then, through the hinged first connecting rod 221 and the second connecting rod 223, it is converted into the lateral movement of the first plate 21 and the vertical sliding of the second plate 23, ultimately realizing the adjustment of the opening of the central vent 11.

[0036] Each first slider 222 has a first through hole for the second lead screw 63 to pass through without contact; each second slider 224 has a second through hole for the first lead screw 62 to pass through without contact, ensuring that the first lead screw 62 drives only the first slider 222 and the second lead screw 63 drives only the second slider 224, and their movements do not interfere with each other, thus ensuring the stability of the transmission process.

[0037] Existing passive simulation technologies rely on manual disassembly and assembly of grid strips to adjust parameters, while active simulation technologies also require manual operation for elevation and lateral installation, which is time-consuming and labor-intensive. This application utilizes an automated drive system, combining a drive motor 61 with first and second lead screws 62 and 63, to replace manual adjustment. Precise control of the opening of the central vent 11 can be achieved simply by controlling the motor's start and stop, solving the problems of cumbersome parameter adjustments and high labor costs, and significantly improving experimental efficiency. When switching to active simulation mode, the drive assembly 60 can precisely adjust the central vent 11 to its maximum opening without manual measurement or adjustment, ensuring smooth and accurate switching between active and passive modes and further expanding the application scenarios of the device.

[0038] In some embodiments, please refer to Figure 4 and Figure 5Each first plate 21 includes a side plate body 211, a surrounding plate body 212, a first scroll 213, and a second scroll 214. The side plate body 211 is positioned above the second plate 23. Two surrounding plate bodies 212 are provided, each abutting against the two side edges of the two side plate bodies 211, and each surrounding plate body 212 is positioned on both sides of the second plate 23. The first scroll 213 is located at the bottom end of the side plate body 211 and is used for winding the side plate body 211. Two second scrolls 214 are provided, each corresponding to one of the two surrounding plate bodies 212, and each second scroll 214 is arranged vertically and is used for winding the corresponding surrounding plate body 212. The end of the second connecting rod 223 connected to the second plate 23 has a bracket 24 for rotatably connecting the first scroll 213. The second scroll 214 is rotatably mounted on the mounting plate 10. In this embodiment, the side plate body 211 is located above the second plate 23, and its bottom end is connected to the first roller 213, forming the top shielding structure of the first plate 21 and serving as part of the upper boundary of the central vent 11. Two side plate bodies 212 respectively abut against the two sides of the side plate body 211 and are symmetrically arranged on both sides of the second plate 23, forming the side shielding structure of the first plate 21 and serving as part of the lateral boundary of the central vent 11. The first roller 213 is installed at the bottom end of the side plate body 211 and is used to wind and store the side plate body 211. It is rotatably connected to the bracket 24 at the connection end of the second connecting rod 223 and the second plate 23. Two second rollers 214 correspond one-to-one with the two side plate bodies 212 and are fixed vertically on the mounting plate 10, respectively used to wind and store the corresponding side plate body 212, providing support for the extension and retraction of the side plate body 212.

[0039] When the adjusting structure 22 drives the second connecting rod 223 to slide the second plate 23 vertically, the bracket 24 on the second connecting rod 223 will simultaneously drive the first scroll 213 to move. The displacement of the first scroll 213 will pull the side plate body 211 to unfold or roll up, realizing the adjustment of the vertical length of the side plate body 211. When the two first plates 21 move laterally towards or away from each other under the driving action of the adjusting structure 22, the side plate bodies 212 are subjected to tension or thrust, and unfold or roll up on the corresponding second scroll 214, realizing the adjustment of the lateral width of the side plate bodies 212. The coordinated extension and retraction of the side plate bodies 211 and the side plate bodies 212 can dynamically change the effective shielding area of ​​the first plate 21, and then, in conjunction with the displacement of the second plate 23, realize the fine control of the opening of the central ventilation opening 11.

[0040] Specifically, in the above embodiment, the first reel 213 is a spring-loaded reel, including a first reel 213 body and a first spring. One end of the first spring is fixed to the inner wall of the first reel 213 body, and the other end is connected to the end of the side plate body 211. The second reel 214 is a spring-loaded reel, including a second reel 214 body and a second spring. One end of the second spring is fixed to the inner wall of the second reel 214 body, and the other end is connected to the end of the surrounding plate body 212.

[0041] When the second link 223 drives the second plate 23 to slide vertically, the displacement of the second plate 23 will pull the side plate body 211 to stretch or contract, and the first coil spring will undergo elastic deformation accordingly. When the driving force disappears, the rebound force of the first coil spring can make the side plate body 211 automatically return to its original position, ensuring the fit between the side plate body and the second plate 23 and preventing air leakage. When the first plate 21 moves laterally, the enclosure body 212 is stretched by tension or contracted by the rebound force of the second coil spring. The extension and retraction adjustment of the enclosure body 212 can be realized without the need for additional driving components, simplifying the device structure.

[0042] The elastic deformation of the coil spring has linear characteristics. The coil spring allows for a smoother unfolding or retraction of the side plate body 211, the surrounding plate body 212, and the second plate 23, avoiding plate deformation or adjustment jamming caused by rigid tension, and further improving the adjustment accuracy of the central vent 11 opening. The coil spring-type roller does not require additional drive components such as motors or lead screws; it achieves automatic plate reset and extension / retraction solely through mechanical elasticity, reducing assembly and maintenance costs.

[0043] In some embodiments, please refer to Figure 4 The adjustment unit 20 also includes auxiliary plates 25 and third rollers 26. Two auxiliary plates 25 are provided, each connected to one side of the second plate 23. Two third rollers 26 are provided, each corresponding to one of the two auxiliary plates 25. The two third rollers 26 are rotatably mounted on the mounting plate 10, and each is used to wind the corresponding auxiliary plate 25. In this embodiment, there are two auxiliary plates 25, fixedly connected to the two side edges of the second plate 23 and located in the gap area between the two first plates 21, with their length direction consistent with the vertical sliding direction of the second plate 23. Two third rollers 26 are provided, each corresponding to one of the two auxiliary plates 25, and are rotatably mounted on the mounting plate 10 in the horizontal direction. Each third roller 26 is used to wind and store the corresponding auxiliary plate 25, providing a supporting carrier for the extension and retraction of the auxiliary plate 25.

[0044] The telescopic movement of the auxiliary plate 25 is linked to the displacement of the second plate 23 and coordinates with the lateral adjustment of the first plate 21. When the adjusting structure 22 drives the second plate 23 to slide vertically, the auxiliary plate 25 connected to both sides of the second plate 23 will move synchronously. At the same time, the auxiliary plate 25 can be unfolded or rolled up on the third scroll 26 to achieve dynamic adjustment of its own length. When the two first plates 21 move laterally towards or away from each other, the auxiliary plate 25 can fill the gap between the first plate 21 and the second plate 23. Meanwhile, the amount of telescopic movement of the auxiliary plate 25 can be adapted to the lateral adjustment range of the first plate 21 to ensure the integrity of the boundary of the central vent 11. The auxiliary plate 25, the first plate 21, and the second plate 23 together enclose the central vent 11, and the three move in coordination.

[0045] Specifically, the third reel 26 can also be a spring-loaded reel.

[0046] In some embodiments, please refer to Figure 7 and Figure 8 The windbreak unit 30 also includes a mounting shaft 31 and fixing components. The mounting shaft 31 is arranged vertically and is detachably connected to the mounting plate 10. The mounting shaft 31 is used for mounting each sealing structure. Multiple fixing components are provided, each corresponding to one sealing structure, and each fixing component is detachably connected to its corresponding sealing structure for fixing each sealing structure. In this embodiment, the mounting shaft 31 is detachably mounted vertically on the mounting plate 10, serving as a unified mounting carrier for all sealing structures. The mounting positions on the mounting shaft 31 correspond one-to-one with the mounting holes on the mounting plate 10, ensuring that each sealing structure can accurately correspond to its corresponding mounting hole to form an annular ventilation opening. The number of fixing components corresponds one-to-one with each sealing structure, and each fixing component is detachably connected to its corresponding sealing structure. Its function is to securely fix the sealing structure in the preset position of the mounting shaft 31, preventing airflow impact from causing displacement of the sealing structure.

[0047] When the device switches from passive simulation mode to active simulation mode, the opening of the central vent 11 is first adjusted to the maximum using the adjustment unit 20. Then, the sealing structures are installed one by one on the mounting shaft 31 and fixed with fasteners, so that the sealing structures and mounting holes cooperate to form an annular vent. The combination design of the mounting shaft 31 and the fasteners can firmly lock the sealing structures in the preset position, avoiding loosening or displacement of the sealing structures due to high-speed airflow impact during wind tunnel experiments, and ensuring the stability of the device operation in active simulation mode. When it is necessary to switch from active simulation mode to passive simulation mode, all sealing structures can be quickly disassembled and stored without interfering with the normal operation of the adjustment unit 20. This application provides a unified installation positioning reference for all sealing structures through the vertical mounting shaft 31, ensuring that each sealing structure is precisely aligned with the mounting hole. The resulting annular vent has a regular shape and high coaxiality, making the airflow disturbance more uniform during active simulation, thereby improving the simulation accuracy of the turbulent field and more closely resembling the pulsating characteristics of natural wind.

[0048] Specifically, each fastener includes multiple fixing bolts. The mounting plate 10 is provided with multiple slots 12, which are spaced apart in the vertical direction, and each slot 12 is used for mounting the mounting shaft 31.

[0049] In some embodiments, please refer to Figure 7 and Figure 8 Each sealing structure includes two baffles 33 arranged at an included angle, each baffle 33 being rotatably connected to a mounting shaft 31. Specifically, the included angle between the two baffles 33 is less than or equal to 180°. In this embodiment, the two baffles 33 are arranged at an included angle and are rotatably connected to the mounting shaft 31. When it is necessary to increase the opening of the annular vent, the two baffles 33 can be driven to rotate inward around the mounting shaft 31, reducing the included angle and decreasing the blocking area of ​​the mounting hole. When it is necessary to decrease the opening of the annular vent, the two baffles 33 can be driven to rotate outward around the mounting shaft 31, increasing the included angle and increasing the blocking area of ​​the mounting hole, thus enhancing the disturbance effect on the airflow. After adjustment, the deflection angle of the baffles 33 can be locked by fixing components to ensure structural stability during the experiment. If it is necessary to adjust the opening of the annular vent, the fixing components at the corresponding positions can be removed first, the baffles 33 can be rotated to the target position, and then locked again by fixing components. The detachable design of the fasteners allows the sealing structure to be disassembled, installed, and repositioned without additional tools (or with only simple tools), greatly simplifying the operation process.

[0050] In some embodiments, please refer to Figure 7The adjustable-parameter turbulence generator provided in this embodiment of the invention also includes a vibration device 32. The vibration device 32 is connected to the windbreak unit 30 and is used to drive the windbreak unit 30 to vibrate. Specifically, the vibration device 32 is connected to the mounting shaft 31. In this embodiment, the output end of the vibration device 32 is connected to the mounting shaft 31 of the windbreak unit 30 to ensure that vibration energy can be uniformly transmitted to the entire windbreak unit 30. The function of the vibration device 32 is only enabled in active simulation mode and is deeply coupled with the dual-mode switching logic of the device. When the device switches to active simulation mode, the opening of the central vent 11 of the adjustment unit 20 is first adjusted to the maximum, then the windbreak unit 30 is assembled to form an annular vent, and then the vibration device 32 is activated to drive the windbreak unit 30 to generate vibrations of a specific frequency and amplitude.

[0051] The vibrating windbreak unit 30 applies periodic disturbances to the airflow passing through the annular vent, injecting additional pulsating energy into the airflow. This causes the turbulent field in the wind tunnel to produce pulsating characteristics more similar to natural wind. By adjusting the frequency and amplitude of the vibration device 32, the pulsating frequency and intensity of the turbulent field can be precisely controlled. When the device switches to passive simulation mode, the windbreak unit 30 is removed, and the vibration device 32 stops working, without interfering with the passive simulation process of the control unit 20 controlling the blockage ratio of the central vent 11.

[0052] The vibration device 32 can adopt conventional structures such as electromagnetic vibrators and eccentric wheel vibration motors. Its vibration frequency and amplitude can be adjusted independently to match the pulsation characteristics of different turbulent fields.

[0053] In some embodiments, please refer to Figures 9 to 11 The adjustable-parameter turbulence generator provided in this embodiment further includes multiple contour adjustment members 40, each contour adjustment member 40 being detachably connected to each sealing structure. Each contour adjustment member 40 is used to adjust the edge flatness of each sealing structure. Each contour adjustment member 40 includes a base plate 41 and a protrusion 42. The base plate 41 is detachably connected to a corresponding baffle 33. Multiple protrusions 42 are provided, and each protrusion 42 is arranged sequentially on the base plate 41 along its length. In this embodiment, the contour adjustment member 40 is composed of a base plate 41 and multiple protrusions 42.

[0054] The substrate 41 serves as the supporting base and is detachably connected to the corresponding sealing structure. The connection method can be a convenient form such as a snap-fit, facilitating disassembly and replacement. The contour adjustment component 40 is assembled at the edge of the sealing structure that comes into contact with the airflow. Specifically, the substrate 41 is detachably connected to the baffle 33. The edge of the baffle 33 has a groove for mounting the substrate 41. There are multiple protrusions 42, arranged sequentially along the length of the substrate 41. The shape, size, and spacing of the protrusions 42 can be customized according to experimental requirements (the protrusions 42 can be cylindrical, cuboid, hemispherical, triangular prism, trapezoidal, etc.), and their protruding direction faces the side through which the airflow passes.

[0055] The contour adjustment component 40 alters the edge contour of the sealing structure, thereby controlling the disturbance pattern of airflow passing through the annular vent. In active simulation mode, the windbreak unit 30 is assembled to form the annular vent. At this time, the contour adjustment component 40, along with the sealing structure, is positioned within the airflow channel. When airflow passes through the edge of the sealing structure with protrusions 42, it forms vortices of a specific shape under the disturbance of the protrusions 42, thus altering the pulsation characteristics of the turbulent field. Experimenters can precisely control the airflow disturbance pattern by replacing the contour adjustment component 40 with different protrusion specifications (shape, size, spacing) or adjusting the installation position of the contour adjustment component 40 on the sealing structure, according to simulation requirements. In passive simulation mode, when disassembling the windbreak unit 30, the contour adjustment component 40 can be removed along with the sealing structure without interfering with the operation of the adjustment unit 20.

[0056] Existing active simulation devices typically feature smooth, flat edges on their barrier structures, resulting in a limited range of disturbances that fail to simulate the complex turbulent fluctuations of natural wind fields. This solution addresses this by adding a contour adjustment component 40 with protrusions 42 to the edge of the barrier structure. This allows for the creation of specific airflow vortices, making the simulated turbulent field more closely resemble the actual disturbances experienced by natural wind across different terrains and buildings. The contour adjustment component 40 is detachable, and the protrusions 42 can be customized. Researchers can quickly replace the contour adjustment component 40 with the appropriate size to meet different simulation needs (such as simulating wind field characteristics on different underlying surfaces like plains, mountains, and urban building complexes), without requiring a complete redesign and manufacture of the barrier structure itself. This flexible switching capability enables the device to meet diverse turbulence simulation experimental requirements.

[0057] Compared to directly customizing various specifications of sealing structures, replacing different specifications of contour adjustment components 40 is less costly and easier to operate. At the same time, contour adjustment components 40 can upgrade and modify existing sealing structures without discarding original parts, which greatly reduces the cost of updating and maintaining experimental equipment and improves the economy and practicality of the device.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A turbulence generator with adjustable parameters, characterized in that, It includes multiple generating units arranged in sequence; each generating unit includes: Lifting base; A mounting plate is provided on the lifting base, and the mounting plate is provided with a plurality of mounting holes arranged at intervals along the vertical direction; The system includes multiple adjustment units, each corresponding to a specific mounting hole. Each adjustment unit is mounted on the mounting plate and is used to form a central vent in the corresponding mounting hole and to adjust the opening of the central vent. The windbreak unit is detachably connected to the mounting plate and includes a sealing structure. Multiple sealing structures are provided, and each sealing structure corresponds to a mounting hole. The sealing structure is used to form an annular vent with the corresponding mounting hole and to adjust the opening of the annular vent. The adjustment unit is combined with the mounting plate to provide passive simulation; when the opening of the central vent is at its maximum, the windbreak unit is connected to the mounting plate to provide active simulation.

2. The adjustable parameter turbulence generator as described in claim 1, characterized in that, Each of the adjustment units includes: The first plate body is provided in two, with the two first plate bodies arranged at intervals, and the two first plate bodies are respectively arranged on both sides of the corresponding mounting hole; The adjustment structure is provided in two parts, each of which corresponds to one of the two first plates. The two adjustment structures are used to adjust the interval between the two first plates. The second plate is slidably disposed in the corresponding mounting hole in the vertical direction. The second plate is located between the two first plates and is connected to the two adjustment structures. The central ventilation opening is formed by the two first plates, the second plate, and the upper inner wall of the mounting hole.

3. The adjustable parameter turbulence generator as described in claim 2, characterized in that, Each of the aforementioned adjustment structures includes: The first connecting rod has one end slidably connected to the corresponding first plate in the vertical direction, and the other end is provided with a first slider; The second connecting rod has one end connected to the second plate and the other end provided with a second slider; the second connecting rod is hinged to the first connecting rod.

4. The adjustable parameter turbulence generator as described in claim 3, characterized in that, The adjustable parameter turbulence generator further includes two drive components, each corresponding to one of the two adjustment structures of each adjustment unit; each drive component includes: A drive motor is mounted on the lifting base. The drive motor has two power output ends, and the two power output ends rotate in opposite directions. The first lead screw has one end connected to one of the power output ends, and the other end extends vertically and is threadedly connected to each of the corresponding first sliders. The second lead screw has one end connected to another of the aforementioned power output ends, and the other end extends vertically and is threadedly connected to each of the corresponding second sliders. Each of the first sliders is provided with a first through hole for the second lead screw to pass through, and each of the second sliders is provided with a second through hole for the first lead screw to pass through.

5. The adjustable parameter turbulence generator as described in claim 3, characterized in that, Each of the first plates includes: The side panel body is positioned above the second panel. The enclosure body is provided in two parts, and the two enclosure bodies abut against the two side edges of the two side panels respectively. The two enclosure bodies are respectively disposed on both sides of the second panel. The first spool is located at the bottom end of the side plate body and is used for winding the side plate body. There are two second scrolls, each corresponding to one of the two enclosure panels. Each second scroll is arranged in a vertical direction, and the two second scrolls are used to wind the corresponding enclosure panel. The second connecting rod has a bracket at one end connected to the second plate for rotatably connecting to the first reel; the second reel is rotatably mounted on the mounting plate.

6. The adjustable parameter turbulence generator as described in claim 2, characterized in that, The adjustment unit further includes: Two auxiliary plates are provided, and the two auxiliary plates are respectively connected to both sides of the second plate. There are two third rollers, each corresponding to one of the two auxiliary plates. The two third rollers are rotatably mounted on the mounting plate, and each third roller is used to wind the corresponding auxiliary plate.

7. The adjustable parameter turbulence generator as described in claim 1, characterized in that, The windbreak unit also includes: The mounting shaft is arranged vertically and is detachably connected to the mounting plate; the mounting shaft is used for mounting each of the sealing structures. The fasteners are provided in multiple parts, each fastener corresponding to each of the sealing structures, and each fastener and the corresponding sealing structure are detachably connected for fixing each sealing structure.

8. The adjustable parameter turbulence generator as described in claim 7, characterized in that, Each of the sealing structures includes two baffles arranged at an included angle, and the two baffles are rotatably connected to the mounting shaft.

9. The adjustable parameter turbulence generator as described in claim 1, characterized in that, The adjustable turbulence generator also includes a vibration device connected to the windbreak unit for driving the windbreak unit to vibrate.

10. The adjustable parameter turbulence generator as described in claim 8, characterized in that, The adjustable turbulence generator further includes multiple contour adjustment components for adjusting the edge flatness of each of the sealing structures, each contour adjustment component being detachably connected to each of the sealing structures; each contour adjustment component includes: The substrate is detachably connected to the corresponding baffle. The substrate has multiple bumps, and each bump is arranged sequentially on the substrate along the length direction of the substrate.

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