Assembled wind field simulation system

Abstract

The invention relates to an assembled wind field simulation system, belongs to the technical field of aerodynamic force, wind engineering and fluid tests, solves the problems that wind field simulation equipment in the prior art is huge in size, heavy, complex to control and low in quality of a generated wind field, and comprises a wind field simulation device which comprises a plurality of single ducted fan modules assembled into an array, the wind field is provided; the control device is used for detecting the wind speed of the wind field provided by the wind field simulation device and controlling the wind speed and the wind direction of the wind field provided by the wind field simulation device; the data collection device is mounted on the to-be-tested device and used for collecting wind-resistant flight data of the to-be-tested device and transmitting the wind-resistant flight data to the control device; wherein the single ducted fan module comprises a duct and a fan arranged in the duct.

Description

Technical Field

[0001] The present invention relates to the technical fields of aerodynamics, wind engineering and fluid testing, and particularly relates to an assembled wind field simulation system. Background Art

[0002] Existing wind tunnels and other wind field simulation devices are not only huge in volume and high in cost, but also difficult to move. In actual tests, for example, model tests of unmanned aerial vehicles, propellers, etc., need to be carried out in a wind field that can simulate the real environment. Therefore, the simulation of the wind field indoors is essential. Existing wind field simulation devices for simulating the wind field have problems such as huge volume, heaviness, complex control, too large rotor spacing during wind field simulation, and low wind field quality, thus seriously affecting the experimental accuracy.

[0003] In addition, the construction cost and operation cost of existing wind tunnel test equipment are too high, and the cost performance for the performance inspection of unmanned aerial vehicles is too low to meet the needs of industrial applications. In addition, in the prior art, in the method of forming a wind curtain with a fan, the wind field formed by the fan is not stable and uniform enough, especially outdoors, and is easily interfered by natural wind to form turbulent flow. In addition, the existing technology of borrowing natural conditions such as strong wind weather for testing is restricted by natural conditions and does not meet the requirements of conventional performance tests. To sum up, the results obtained by these testing means are inaccurate and the operation cost is too high, making it difficult to meet the requirements of wind field simulation.

[0004] Currently, wind field simulation tests are used in the research on the wind resistance performance of unmanned aerial vehicles. However, due to the complex types of wind fields, there are great differences between the simulated wind field and the actual wind field, and the accuracy of the performance test results of wind field simulation devices such as wind walls is not high.

[0005] Therefore, there is a need in the art for an improved wind field simulation system that can be small in volume, easy to control, can delimit different wind field simulation areas according to different objects, form a stable and uniform wind field, and can realize the expandability of the wind generation range. Summary of the Invention

[0006] In view of the above problems, the present invention provides an assembled wind field simulation system, which solves the problems of large volume, complex control and insufficient accuracy of existing wind field simulation devices.

[0007] According to an embodiment of the present invention, an assembled wind field simulation system is provided, including: a wind field simulation device, including a plurality of single ducted fan modules assembled into an array for providing a wind field; a control device for detecting the wind speed of the wind field provided by the wind field simulation device and controlling the magnitude and direction of the wind speed of the wind field provided by the wind field simulation device; a data collection device installed on the device to be tested for collecting the anti-wind flight data of the device to be tested and transmitting the anti-wind flight data to the control device; wherein the single ducted fan module includes a duct and a fan disposed in the duct.

[0008] Optionally, the duct of the single ducted fan module has a regular hexagonal cross-sectional shape, including six sides of the same length.

[0009] Optionally, the dimension range of the depth length of the duct is 10 cm to 30 cm, and the dimension range of the length of each side of the regular hexagonal cross-section of the duct is 8 cm to 16 cm.

[0010] Optionally, each of the six sides of the duct of the single ducted fan module has a convex portion or a concave portion, and the convex portion and the concave portion form a plug-in structure, and the shapes and dimensions of the convex portion and the concave portion are set to be mutually matched and fitted.

[0011] Optionally, among the six sides of the duct, three adjacent sides respectively form convex portions, and the other three adjacent sides respectively form concave portions.

[0012] Optionally, among the six sides of the duct, three sides spaced from each other respectively form convex portions, and the other three spaced sides respectively form concave portions.

[0013] Optionally, the wind field simulation device is composed of a plurality of single ducted fan modules forming a regular hexagonal array layout.

[0014] Optionally, the wind field simulation device further includes: a support frame, including a plurality of support frame modules for assembling with the outermost single ducted fan module of the plurality of single ducted fan modules assembled into an array; wherein the support frame module has a shape matching the duct of the single ducted fan module, and concave and convex portions matching the plug-in structure of the duct.

[0015] Optionally, the control device includes a first microprocessor, an airborne signal processor, and a wind speed control module; wherein the wind speed control module is electrically coupled to the first microprocessor, receives a control signal from the first microprocessor, and is electrically connected to the fans of each of the single ducted fan modules to control the wind speed generated by the fans.

[0016] Optionally, the control device further includes a wind regulator installed on the support frame.

[0017] An assembled wind field simulation system provided by the present invention optimizes the installation and manufacturing of wind field simulation equipment by adopting a lightweight and easy-to-assemble design with a highly compact layout. Among them, the highly compact layout abandons the traditional square or rectangular structure ducts and adopts a regular hexagon duct design, which can significantly optimize the space utilization rate of the fans. The lightweight and easy-to-assemble design means that the duct fan modules adopt a building block type plug-in design, enabling rapid installation.

[0018] An assembled wind field simulation system provided by the present invention makes the wind field simulation system in the indoor environment easier to build and assemble through lightweight and modular design; and a highly compact design is carried out on the duct shape of the duct propeller module that composes the wind wall, which can reduce the interference between the fans and achieve uniform generation of the wind field.

[0019] Compared with the prior art, an assembled wind field simulation system provided by the present invention has at least the following beneficial effects.

[0020] (1) The highly compact layout with a regular hexagon duct design can significantly optimize the space utilization rate of the fans.

[0021] (2) The building block type plug-in design between single duct fan modules enables rapid installation and is easier to build.

[0022] (3) A highly compact design is carried out on the duct shape of the duct propeller module that composes the wind wall, which can reduce the interference between the fans and achieve uniform generation of the wind field. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. By referring to the drawings, the features and advantages of the present invention can be more clearly understood. The drawings are schematic and should not be construed as any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Schematic diagram of a single duct fan module of an assembled wind field simulation system provided according to an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the array arrangement of multiple single duct fan modules of an assembled wind field simulation system provided according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the edge arrangement of multiple single duct fan modules of an assembled wind field simulation system provided according to an embodiment of the present invention.

[0027] Figure 4 The wiring diagram of the frequency converter of the wind speed control module of a control device for an assembled wind field simulation system provided according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Wind field simulation device;

[0030] 10. Single ducted fan module;

[0031] 20. Duct;

[0032] 22. Plug - and - play structure;

[0033] 24. Convex part;

[0034] 26. Concave part;

[0035] 30. Fan;

[0036] 40. Support frame;

[0037] 42. Support frame module. Detailed implementation manners

[0038] In order to more clearly understand the above - mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0039] Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0040] The following provides a detailed description of an assembled wind field simulation system according to an embodiment of the present invention with reference to the accompanying drawings.

[0041] Such as Figures 1 to 3As shown, an assembled wind field simulation system provided according to an embodiment of the present invention includes: a wind field simulation device 1 for providing a wind field; a control device for detecting the wind speed of the wind field provided by the wind field simulation device and controlling the magnitude and direction of the wind speed of the wind field provided by the wind field simulation device 1; a data collection device installed on the device to be tested for collecting the anti-wind flight data of the device to be tested and transmitting the anti-wind flight data to the control device. Among them, the wind field simulation device 1 includes a plurality of assembled single ducted fan modules 10. Each single ducted fan module 10 includes a duct 20 and a fan 30 disposed in the duct 20, and provides a wind field by driving the fan 30. In this embodiment, the device to be tested is a small aircraft such as a drone or a propeller tested by the assembled wind field simulation system.

[0042] The working mode of an assembled wind field simulation system provided according to an embodiment of the present invention is that, through the control device, the fans 30 of each single ducted fan module 10 of the wind field simulation device 1 are controlled to generate a wind field with the required wind speed magnitude and direction, so as to generate a wind field for testing the device to be tested. During this process, the anti-wind flight data detected can also be collected by the data collection device installed on the device to be tested and fed back to the control device, and the control device further adjusts the control of the fan 30 according to the feedback information to optimize the generated wind field.

[0043] In this embodiment, the control device includes a first microprocessor, an on-board signal processor, and a wind speed control module. The first microprocessor serves as a front-end processor and is used to perform the following functions: data acquisition: receiving raw data from sensors such as wind speed, direction, temperature, etc.; preliminary processing: simple data processing tasks such as noise filtering, signal amplification, analog-to-digital conversion (ADC), etc.; data transmission: transmitting the processed data to the on-board signal processor. The on-board signal processor serves as a back-end processor and is installed on the test equipment and is used to perform the following functions: advanced processing: performing complex processing on the received data such as data analysis, storage, and integrating information from multiple sensors; system control: adjusting the parameters (such as wind speed, direction) of the wind field simulation device according to the processed data to simulate different wind conditions; communication and feedback: communicating with other systems and providing real-time feedback to ensure the test accuracy.

[0044] Among them, the wind speed control module is electrically coupled to the first microprocessor and receives a control signal from the first microprocessor. The wind speed control module is coupled to the host of the peripheral device, where the host includes a processor and a display. The wind speed control module is also electrically connected to the fan 30 for controlling the wind speed generated by the fan 30. Optionally, the fan 30 can use an axial flow fan or other suitable fans.

[0045] Such asFigure 1 and Figure 2 As shown, the wind field simulation device 1 of this embodiment includes a plurality of assembled single ducted fan modules 10. Each single ducted fan module 10 includes a duct 20 and a propeller-type fan 30 accommodated in the duct 20. The duct 20 has a regular hexagonal cross section and is a regular hexagonal duct, including six sides of the same length. The space utilization rate of the regular hexagonal duct 20 of this embodiment can reach 90.69%, and the calculation method is as follows:

[0046]

[0047] Among them, R represents the radius of the inscribed circle of the regular hexagonal cross section of the duct, σ represents the space utilization of the duct, and πR 2 represents the area of ​​the inscribed circle of the regular hexagonal cross section of the duct, and Represents the area of ​​the regular hexagonal cross section of the duct. Using the same method, the space utilization rate of the conventional quadrilateral duct can be calculated to be 78.54%. It can be obtained that the space utilization rate of the regular hexagonal shape is about 1.15 times that of the regular quadrilateral. Therefore, the regular hexagonal duct 20 in this embodiment can greatly improve the utilization rate of the propeller fan of the duct in space.

[0048] Continue to refer Figure 1 , each inner angle in the regular hexagonal cross-section of the duct 20 of this embodiment is 120 degrees, which enables the duct 20 to evenly disperse the force when subjected to force. If the size of the inner angles of a polygon varies greatly, then when impacted by external forces, the inner angle part with a smaller angle is prone to bear greater pressure, resulting in structural instability. The regular hexagonal inner angles of the duct 20 are of uniform size, and the force is evenly distributed, so it is not easy for local excessive force to occur. From the perspective of geometric structure, the six sides of the regular hexagon are equal in length. Such equal-length sides make the supporting force in all directions relatively balanced. When subjected to forces from different directions, the regular hexagon can distribute these forces more evenly to each side, thereby reducing the possibility of deformation or damage caused by excessive pressure on a certain side or a certain node. In a hexagonal plane figure, when the perimeter is constant, the area of ​​the regular hexagon is the largest. This means that with the same materials and costs, the largest internal space can be obtained by constructing a regular hexagonal structure.

[0049] Optionally, the longitudinal depth of the duct 20 of the single ducted fan module 10 can be set to 10 cm to 30 cm, and can further be set to, for example, 20 cm. The length of each side of the regular hexagonal cross-section can be set to 8 cm to 16 cm, and can further be set to, for example, 12 cm.

[0050] like Figure 2As shown, in this embodiment, the wind field simulation device 1 includes a plurality of single duct fan modules 10 arranged in an array, which can obtain a more compact layout design. In the wind field simulation device 1, the single duct fan modules 10 are arranged in a regular hexagon layout in an array, which can greatly improve the utilization rate in the plane and in space, shorten the relative distance between the fans of adjacent single duct fan modules, and make the subsequent simulation of the wind field have a more uniform characteristic, effectively improving the quality of the wind field generated. Figure 2 It is exemplarily shown that the regular hexagon array layout is centered on a single duct fan module 10, and a single duct fan module 10 is assembled on each of its six sides. According to needs, single duct fan modules 10 can also be continuously assembled on the Figure 2 outer periphery of the regular hexagon array to form a larger-scale wind field. It should be understood that, according to needs, a plurality of single duct fan modules 10 can also be assembled into other array forms.

[0051] Continuing to refer to Figure 1 , in this embodiment, on each of the six sides of the regular hexagon duct 20, there is arranged a building block type plug-in structure 22, which can realize the rapid assembly of the whole wind wall (i.e., the wind field simulation device 1) and the lightweight assembly of the duct fan. According to the plug-in relationship of the modules, any number of single duct fan modules 10 can be assembled through the plug-in structure 22 to form a wind field simulation device 1 in the form of a combined array type wind wall, and its relative position is as Figure 2 shown. As Figure 1 and Figure 2 shown, the plug-in structure 22 of the duct 20 may include a convex portion 24 and a concave portion 26 that can be inserted and locked with each other. For example, in one example, the plug-in structure 22 on a regular hexagon duct 20 including six sides can be set such that convex portions 24 are respectively formed on three adjacent sides, and concave portions 26 are respectively formed on the other three adjacent sides. Optionally, in another example, the plug-in structure 22 on a regular hexagon duct 20 can be set such that convex portions 24 and concave portions 26 are respectively arranged on the six sides at intervals, that is, for every two adjacent sides, a convex portion 24 is arranged on one side and a concave portion 26 is arranged on the other side. Optionally, when assembling a plurality of single duct fan modules 10 through the plug-in structure 22, screws, bonding and other methods can also be used for reinforcement at the joint parts of adjacent single duct fan modules 10 to further ensure the stability of the whole wind field simulation device 1 during operation.

[0052] As Figure 3As shown in the figure, for the convenience of the structural arrangement, installation and fixation of the wind field simulation device 1, the wind field simulation device 1 may further include a support frame 40. According to the installation scenario and requirements, after a plurality of single duct fan modules 10 are arranged and inserted in an array, a support frame 40 can be provided at the outermost single duct fan module 10 of the array of the plurality of single duct fan modules 10, so that the wind field simulation device 1 can be stably installed and placed as required. As Figure 3 shown, a module of the support frame at the edge of an exemplary wind field simulation device 1 is schematically shown. In this embodiment, the support frame 40 includes a plurality of support frame modules 42. Each support frame module has a shape matching that of the single duct fan module 10, and on its installation side edge with the single duct fan module 10, a plug-in structure with protrusions and recesses can also be formed for plugging and assembling with the single duct fan module 10. When the corresponding support frame module 42 is plugged and assembled with the single duct fan module 10, it can also be reinforced by means such as screws and bonding to further ensure the stability of the overall wind field simulation device 1 during operation.

[0053] Optionally, the control device may further include a wind force regulator, which can be installed on the support frame 40, and the wind force regulator and the support frame 40 can be connected as a module.

[0054] As described above, the control device of the assembled wind field simulation system provided according to the embodiment of the present invention includes a first microprocessor, an airborne signal processor, and a wind speed control module. The wind speed control module is coupled to the first microprocessor and the host of the peripheral device, and is electrically connected to the fan 30 for controlling the wind speed generated by the fan 30. The wind speed control module includes an inverter and its connection circuit.

[0055] As Figure 4 shown, the inverter of the wind speed control module and its connection circuit are shown. The inverter is used to adjust the rotation speed of the fan 30 installed in the duct 20, and further control the air volume generated by the fan 30 per unit time (the magnitude of the oncoming wind speed). In this Figure 4Among them, the fan 30 is an axial flow fan. The wiring method of the frequency converter and the axial flow fan is shown in the figure. The connection circuit of the frequency converter includes: a three-phase four-wire 380V AC power supply, which flows through a fuse, an AC input reactor, a contactor, and an input-side EMI filter, and then is connected to the frequency converter. The frequency converter is then connected to the axial flow fan through an output-side EMI filter and an AC output reactor. Among them, the fuse is a circuit protection device for protecting the power supply; the AC input reactor is used to limit the current impact generated by the power grid, protect the frequency converter, and can also improve the power factor on its input side; the contactor also plays a role in protecting the circuit system and is used to quickly cut off the power supply in case of abnormal situations such as short circuits; the input-side EMI filter and the output-side EMI filter are used to suppress the high-frequency noise interference generated by the frequency converter; the AC output reactor is used to suppress the instantaneous high voltage generated by the frequency converter, thereby extending the service life of the axial flow fan. The connection circuit of the frequency converter may also include a DC reactor for protecting the frequency converter and suppressing high-order harmonics. The connection circuit of the frequency converter may also include a braking resistor for avoiding fluctuations in the grid voltage. In addition, the connection circuit of the frequency converter may also include a potentiometer. In the experiment, one or more frequency converters can be uniformly controlled and adjusted through this potentiometer, thereby uniformly controlling the rotation speed of the axial flow fan.

[0056] Any combination of the above optional technical solutions can form an optional embodiment of the present application, which will not be elaborated here one by one.

[0057] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0058] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An assembled wind farm simulation system, characterized in that: include: A wind farm simulation device, comprising a plurality of single ducted fan modules assembled into an array, for providing a wind farm; A control device, used to detect the wind speed of the wind field provided by the wind field simulation device, and control the magnitude and wind direction of the wind speed of the wind field provided by the wind field simulation device; A data collection device, installed on the device to be tested, for collecting wind-resistant flight data of the device to be tested, and transmitting the wind-resistant flight data to the control device; The single ducted fan module includes a duct and a fan arranged in the duct.

2. The assembled wind farm simulation system according to claim 1, characterized in that: The duct of the single ducted fan module has a cross-sectional shape of a regular hexagon, including six sides having the same length.

3. The assembled wind farm simulation system according to claim 2, characterized in that: The depth of the duct ranges from 10 cm to 30 cm, and the length of each side of the regular hexagonal cross section of the duct ranges from 8 cm to 16 cm.

4. The assembled wind farm simulation system according to claim 2, characterized in that: Each of the six sides of the duct of the single ducted fan module has a convex portion or a concave portion, and the convex portion and the concave portion constitute an inserting structure, and the shapes and sizes of the convex portion and the concave portion are arranged to match and fit with each other.

5. The assembled wind farm simulation system according to claim 4, characterized in that: Among the six sides of the duct, three adjacent sides each form a convex portion, and the other three adjacent sides each form a concave portion.

6. The assembled wind farm simulation system according to claim 4, characterized in that: Among the six sides of the duct, three sides that are spaced apart from each other are respectively formed with convex portions, and the other three sides that are spaced apart from each other are respectively formed with concave portions.

7. The assembled wind farm simulation system according to claim 4, characterized in that: The wind field simulation device is composed of a plurality of single ducted fan modules arranged in a regular hexagonal array.

8. The assembled wind farm simulation system according to claim 4, characterized in that: The wind field simulation device also includes: A support frame, comprising a plurality of support frame modules, for assembling with the outermost single ducted fan modules of the plurality of single ducted fan modules assembled into an array; The support frame module has a shape that matches the duct of the single duct fan module, and has concave parts and convex parts that match the splicing structure of the duct.

9. The assembled wind farm simulation system according to claim 1, characterized in that: The control device includes a first microprocessor, an onboard signal processor and a wind speed control module; The wind speed control module is electrically coupled to the first microprocessor, receives a control signal from the first microprocessor, and is electrically connected to the fans of each of the single ducted fan modules to control the wind speed generated by the fans.

10. The assembled wind farm simulation system according to claim 8, characterized in that: The control device also includes a wind regulator mounted to the support frame.

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