Wind tunnel test bed suitable for performance test of automobile heat dissipation module

Abstract

The application provides a wind tunnel test bench suitable for performance test of an automobile heat dissipation module, and belongs to the technical field of automobile heat dissipation performance test. The wind tunnel test bench comprises an air inlet cylinder, a diffusion transition section, an air-cooled heat dissipation part, a water-cooled heat dissipation part, a converging transition section and an air outlet cylinder which are sequentially arranged along the wind direction. The edge of the air outlet end of the air inlet cylinder is provided with a first flange, the edge of the small opening end of the diffusion transition section is provided with a second flange which is connected to the first flange, and a sealing gasket is arranged between the abutting surfaces of the first flange and the second flange. The edge of the air inlet end of the air outlet cylinder is provided with a third flange, the edge of the small opening end of the converging transition section is provided with a fourth flange which is connected to the third flange, and a sealing gasket is arranged between the abutting surfaces of the third flange and the fourth flange. The sealing property of the whole wind tunnel test bench system is ensured, thereby effectively preventing air leakage, improving the test precision and the system stability.

Description

Technical Field

[0001] This application belongs to the field of automotive heat dissipation performance testing technology, specifically relating to a wind tunnel test bench suitable for testing the performance of automotive heat dissipation modules. Background Technology

[0002] In the field of automotive heat dissipation performance testing, sealing is one of the key factors to ensure the accuracy and repeatability of test results.

[0003] However, traditional testing equipment and methods often neglect the sealing issues between different parts of the system, leading to air leakage, pressure loss, and unstable airflow, all of which severely affect the accuracy of test data. This is especially true when simulating actual working conditions, where the sealing of connections between different models of radiators and intercoolers and the testing device is crucial. Leaks at these interfaces not only result in inaccurate wind speed and pressure measurements but also affect the accurate assessment of the radiator and intercooler's heat dissipation performance. Utility Model Content

[0004] To address at least one of the technical problems existing in the background art, this application provides a wind tunnel test bench suitable for testing the performance of automotive heat dissipation modules. By setting sealing gaskets between the air inlet duct and the diffusion transition section, and between the air outlet duct and the convergence transition section, and using flange connections, the sealing performance of the entire wind tunnel test bench system is ensured, thereby effectively preventing air leakage and improving test accuracy and system stability.

[0005] The technical solution adopted in this application is as follows:

[0006] This application provides a wind tunnel test bench suitable for performance testing of automotive heat dissipation modules. The automotive heat dissipation module includes an air-cooled heat sink and a water-cooled heat sink, comprising:

[0007] Air intake duct;

[0008] Air duct;

[0009] A diffusion transition section, wherein the small end of the diffusion transition section is connected to the air outlet of the air inlet duct, and the large end of the diffusion transition section is connected to the air-cooled heat sink.

[0010] A convergent transition section, wherein the small end of the convergent transition section is connected to the air inlet of the air outlet, and the large end of the convergent transition section is connected to the water-cooled heat sink.

[0011] The air inlet duct, the diffusion transition section, the air-cooled heat sink, the water-cooled heat sink, the convergence transition section, and the air outlet duct are arranged sequentially along the wind direction.

[0012] The air inlet duct has a first flange at its outlet edge, and the diffuser transition section has a second flange at its small opening edge that abuts the first flange. A sealing gasket is provided between the mating surfaces of the first flange and the second flange.

[0013] A third flange is formed at the edge of the air inlet end of the air outlet duct, and a fourth flange is formed at the edge of the small opening end of the converging transition section, which is mated to the third flange. A sealing gasket is provided between the mating surfaces of the third flange and the fourth flange.

[0014] The wind tunnel test rig for testing the performance of automotive heat dissipation modules, as provided in this application embodiment, includes an inlet duct, an outlet duct, a diffusion transition section, and a convergence transition section, forming a complete airflow channel. The inlet duct is responsible for introducing stable airflow, and the diffusion transition section gradually expands its cross-section to reduce turbulence and smoothly guide the airflow to the air-cooled heat sink. The small end of the diffusion transition section is connected to the outlet end of the inlet duct via a first flange and a second flange, with a sealing gasket between them to ensure airtightness and prevent air leakage from affecting the test results. Subsequently, the airflow passes through the air-cooled heat sink for cooling effect evaluation, and then enters the water-cooled heat sink for further testing of its heat dissipation performance. The convergence transition section plays the opposite role; its small end connects to the inlet end of the outlet duct, and its large end connects to the water-cooled heat sink, reducing the cross-section to make the airflow more concentrated and smoothly enter the outlet duct. Similarly, the convergence transition section is also connected to the outlet duct via a third flange and a fourth flange, with a sealing gasket to ensure the airtightness of the entire system. This design not only allows the system to adapt to radiators of different sizes and models, but also provides a stable and uniform airflow environment, thereby improving the accuracy and reliability of test data. Furthermore, the flange and gasket design effectively avoids pressure loss and measurement errors caused by air leakage, providing strong technical support and reliable data assurance for the optimized design of automotive cooling modules.

[0015] The flanges can be fastened together with bolts, which also compress the gaskets and ensure a tight seal at the connection. The gaskets can be rubber gaskets, silicone gaskets, spiral wound metal gaskets, or PTFE gaskets, etc.

[0016] According to one embodiment of this application, an inlet pipe and an outlet pipe for connecting to the water-cooled heat sink, and an air inlet pipe and an air outlet pipe for connecting to the air-cooled heat sink are provided between the air inlet pipe and the air outlet pipe, and a temperature detector is installed in each of the inlet pipe, the outlet pipe, the air inlet pipe and the air outlet pipe.

[0017] The air inlet duct is equipped with a wind speed measuring device, an air inlet temperature detector, and a wind resistance measuring device at its air outlet end. The air outlet duct is equipped with a wind resistance measuring device, an air outlet temperature detector, and an adjustable wind speed fan. The fan is located at the air outlet end of the air outlet duct.

[0018] Pressure measuring pipes are connected to the air inlet pipe, air outlet pipe, water inlet pipe, and water outlet pipe. An air compression heating device is also connected to the air inlet pipe, and a heat medium circulation device is connected between the water inlet pipe and the water outlet pipe.

[0019] The aforementioned temperature detector, inlet air temperature detector, outlet air temperature detector, Pitot tube device, air resistance measuring device, fan, air compression heating device and heat medium circulation device are all connected to the controller.

[0020] According to one embodiment of this application, the diffusion angle of the diffusion transition section is 0 to 8°, and the convergence angle of the convergence transition section is 0 to 15°.

[0021] According to one embodiment of this application, the air inlet end of the air inlet duct is double-twisted, and the air outlet end of the air inlet duct is cylindrical or cuboid.

[0022] The air outlet duct is cylindrical or rectangular;

[0023] A rectifier mesh is installed between the air inlet end and the air outlet end of the air inlet duct, and a rectifier grille is installed inside the air outlet end of the air outlet duct. The air outlet duct and the fan are flexibly connected.

[0024] According to one embodiment of this application, a flexible connecting pipe is connected between the air outlet duct and the fan, and the flexible connecting pipe includes a corrugated pipe.

[0025] According to one embodiment of this application, the corrugated pipe includes multiple crest sections, transition sections, and trough sections. Along the axial direction of the corrugated pipe, the crest sections and the trough sections are alternately connected by the transition sections. The axial cross-sectional profile of the transition section is S-shaped, and the crest sections, the trough sections, and the transition sections are integrally formed structures.

[0026] According to one embodiment of this application, the deep wave coefficient value K of the corrugated pipe is 0.15 to 0.3, and the ratio between the wall thickness and the inner diameter of the corrugated pipe is in the range of 0.01 to 0.05.

[0027] According to one embodiment of this application, the wall of the corrugated pipe includes at least one of a GH4169 high-temperature alloy layer, a nickel alloy layer, and a nanocomposite layer.

[0028] According to one embodiment of this application, a noise monitoring sensor is installed near the flexible connecting tube.

[0029] According to one embodiment of this application, a humidity control module is provided at the air inlet end of the air inlet duct;

[0030] The humidity control module includes an air handling unit and a humidity sensor. The air handling unit is used to humidify or dehumidify the air entering the air inlet duct, and the humidity sensor is used to monitor the relative humidity level of the air entering the air inlet duct in real time. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 A schematic diagram of a wind tunnel test bench for testing the performance of automotive heat dissipation modules, provided in an embodiment of this application.

[0033] in,

[0034] 1. Air inlet duct; 2. Rectifier mesh; 3. Wind speed measuring device; 4. Inlet air temperature detector; 5. Wind resistance measuring device I; 6. Air-cooled heat sink; 7. Outlet air pressure measuring tube; 8. Outlet air temperature detector; 9. Outlet pipe; 10. Inlet air pressure measuring tube; 11. Inlet pipe; 12. Inlet air temperature detector; 13. Water-cooled heat sink; 14. Outlet water pressure measuring tube; 15. Outlet water temperature detector; 16. Outlet water pipe; 17. Inlet water pipe; 18. Inlet water temperature detector; 19. Inlet water pressure measuring tube; 20. Heater; 21. 1. Outlet air temperature detector; 22. Flow controller; 23. Flow meter; 24. Hot side flow meter; 25. Compressor; 26. Fan; 27. Hot water pump; 28. Hot water tank; 29. ​​Flexible connecting pipe; 30. Rectifying grille; 31. Air outlet duct; 32. Wind resistance measuring device II; 36. Diffusion transition section; 37. Convergence transition section; 38. First flange; 39. Second flange; 40. Third flange; 41. Fourth flange; 42. Sealing gasket; 43. Noise monitoring sensor; 44. Humidity control module. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0037] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication 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 application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0040] like Figure 1 As shown, this application embodiment provides a wind tunnel test bench suitable for performance testing of automotive heat dissipation modules. The automotive heat dissipation module includes an air-cooled heat sink 6 and a water-cooled heat sink 13, comprising:

[0041] Air inlet duct 1;

[0042] Air outlet 31;

[0043] The diffusion transition section 36 has a small opening end connected to the air outlet end of the air inlet duct 1, and a large opening end connected to the air-cooled heat sink 6.

[0044] Converging transition section 37, the small end of the convergent transition section 37 is connected to the air inlet end of the air outlet duct 31, and the large end of the convergent transition section 37 is connected to the water-cooled heat sink 13.

[0045] The air inlet duct 1, the diffusion transition section 36, the air-cooled heat sink 6, the water-cooled heat sink 13, the convergence transition section 37, and the air outlet duct 31 are arranged sequentially along the wind direction.

[0046] The air inlet duct 1 has a first flange 38 formed at the edge of the air outlet end, and the diffuser transition section 36 has a second flange 39 formed at the edge of the small opening end that is connected to the first flange 38. A sealing gasket 42 is provided between the mating surfaces of the first flange 38 and the second flange 39.

[0047] A third flange 40 is formed at the edge of the air inlet end of the air outlet duct 31, and a fourth flange 41 is formed at the edge of the small opening end of the converging transition section 37, which is mated to the third flange 40. A sealing gasket 42 is provided between the mating surfaces of the third flange 40 and the fourth flange 41.

[0048] The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to the embodiments of this application includes an inlet duct 1, an outlet duct 31, a diffusion transition section 36, and a convergence transition section 37, forming a complete airflow channel. The inlet duct 1 is responsible for introducing stable airflow, and the cross-section gradually expands through the diffusion transition section 36 to reduce turbulence and smoothly guide the airflow to the air-cooled heat sink 6. The small end of the diffusion transition section 36 is connected to the outlet end of the inlet duct 1 through a first flange 38 and a second flange 39, and a sealing gasket 42 is placed between them to ensure airtightness and prevent air leakage from affecting the test results. Subsequently, the airflow passes through the air-cooled heat sink 6 for cooling effect evaluation, and then enters the water-cooled heat sink 13 for further testing of its heat dissipation performance. The convergence transition section 37 plays the opposite role. It connects to the inlet end of the outlet duct 31 from the small end and to the water-cooled heat sink 13 from the large end, and reduces the cross-section to make the airflow more concentrated and smoothly enter the outlet duct 31. Similarly, the convergence transition section 37 and the air outlet duct 31 are also connected by a third flange 40 and a fourth flange 41, and a sealing gasket 42 is installed to ensure the airtightness of the entire system. This design not only allows the system to adapt to radiators of different sizes and models, but also provides a stable and uniform airflow environment, thereby improving the accuracy and reliability of test data. In addition, the design of the flanges and sealing gasket 42 effectively avoids pressure loss and measurement errors caused by air leakage, providing strong technical support and reliable data assurance for the optimized design of automotive cooling modules.

[0049] The flanges can be fastened together with bolts, which also compress the gasket 42 to ensure a tight seal at the connection. The gasket 42 can be a rubber gasket, silicone gasket, metal spiral wound gasket, or PTFE gasket, etc.

[0050] like Figure 1As shown, in some embodiments of this application, an inlet pipe 17 and an outlet pipe 16 for connecting to the water-cooled heat sink 13, and an air inlet pipe 11 and an air outlet pipe 9 for connecting to the air-cooled heat sink 6 are provided between the air inlet pipe 1 and the air outlet pipe 31. Temperature detectors are installed in the inlet pipe 17, the outlet pipe 16, the air inlet pipe 11 and the air outlet pipe 9.

[0051] An air velocity measuring device 3, an air inlet temperature detector 4, and an air resistance measuring device are installed on the air outlet end of the air inlet duct 1. An air resistance measuring device, an air outlet temperature detector 21, and an adjustable fan 26 are installed on the air outlet duct 31. The fan 26 is located on the air outlet end of the air outlet duct 31.

[0052] Pressure measuring pipes are connected to air inlet pipe 11, air outlet pipe 9, water inlet pipe 17 and water outlet pipe 16. An air compression heating device is also connected to air inlet pipe 11. A heat medium circulation device is connected between water inlet pipe 17 and water outlet pipe 16.

[0053] The aforementioned temperature detector, inlet air temperature detector 4, outlet air temperature detector 21, Pitot tube device, air resistance measuring device, fan 26, air compression heating device and heat medium circulation device are all connected to the controller.

[0054] The air inlet pipe 11 is connected to the air inlet of the air-cooled heat sink 6, the air outlet pipe 9 is connected to the air outlet of the air-cooled heat sink 6, the water inlet pipe 17 is connected to the water inlet of the water-cooled heat sink 13, and the water outlet pipe 16 is connected to the water outlet of the water-cooled heat sink 13. The airflow of the fan 26 is maintained at a maximum wind speed of 25 m / s in front of the water-cooled heat sink 13 and the air-cooled heat sink 6. The airflow is adjusted by changing the speed of the fan 26 or by other means. Changing the speed of the fan 26 can be achieved by connecting a frequency converter between the fan 26 and the controller.

[0055] In some embodiments of this application, the diffusion angle of the diffusion transition section 36 is 0–8°, and the convergence angle of the convergence transition section 37 is 0–15°. The large opening ends of the diffusion transition section 36 and the convergence transition section 37 are joined left and right, and the air-cooled heat sink 6 and the water-cooled heat sink 13 are installed sequentially from left to right between the diffusion transition section 36 and the convergence transition section 37. Through the cooperation of the diffusion transition section 36 and the convergence transition section 37, performance testing of various types of heat sinks and intercoolers can be achieved.

[0056] In some embodiments of this application, the inner walls of the air inlet duct 1 and the air outlet duct 31 are flat and smooth, and all connections are sealed and leak-proof. The air inlet end of the air inlet duct 1 is double-twisted, and the air outlet end of the air inlet duct 1 is cylindrical; the air outlet duct 31 is a cylindrical air outlet duct 31. A rectifier mesh 2 is installed between the air inlet end and the air outlet end of the air inlet duct 1, and a rectifier grille 30 is installed inside the air outlet end of the air outlet duct 31, thereby making the airflow in the air inlet duct 1 and the air outlet duct 31 uniform and stable, which is beneficial to improving the accuracy of test data. At the same time, a flexible connecting pipe 29 is connected between the air outlet duct 31 and the air outlet of the fan 26, which can reduce the impact of the vibration of the fan 26 on the airflow in the air outlet duct 31.

[0057] The wind speed measuring device 3 is a Pitot tube device, which includes a Pitot tube pressure sensor located at the center of the air outlet end of the air inlet duct 1. The Pitot tube pressure sensor has a deflection angle of 5° with the airflow direction and is connected to the controller. The Pitot tube device is used to detect the center wind speed inside the air inlet duct 1. The pressure measuring holes on each air inlet duct 1 and air outlet duct 31 are perpendicular to their respective duct walls, and each pressure measuring hole must be flat, smooth, and free of protrusions and burrs.

[0058] Four pressure measuring holes arranged in a circular array are provided on the wall of the air inlet duct 1 and the wall of the air outlet duct 31. The distance between the pressure measuring hole on the air inlet duct 1 and the air-cooled heat sink 6 is D, where D is the inner diameter of the air inlet duct 1. Each of the above pressure measuring holes is equipped with a wind resistance measuring device I5. The distance between the pressure measuring hole on the air outlet duct 31 and the water-cooled heat sink 13 is D, where D is the inner diameter of the air outlet duct 31. Each of the above pressure measuring holes is equipped with a wind resistance measuring device II 32. Both wind resistance measuring devices I5 and II 32 are connected to the controller.

[0059] The pressure testing tube located on the inlet pipe 17 is the inlet pressure testing tube 19. The inlet pressure testing tube 19 is vertically inserted into the inlet pipe 17 and is located 50mm away from the inlet of the water-cooled heat sink 13. The pressure testing tube located on the outlet pipe 16 is the outlet pressure testing tube 14. The outlet pressure testing tube 14 is vertically inserted into the outlet pipe 16 and is located 50mm away from the inlet of the water-cooled heat sink 13. The pressure measuring tube on the air inlet pipe 11 is 50mm from the outlet of the air-cooled heat sink 6. The pressure measuring tube on the air outlet pipe 9 is the air outlet pressure measuring tube 7. The air outlet pressure measuring tube 7 is inserted vertically into the air outlet pipe 9 and is located 100mm from the air outlet of the air-cooled heat sink 6. The diameter of the water inlet pipe 17, the water inlet pressure measuring tube 19, and the water outlet pressure measuring tube 14 is 3mm. The pipes at the measuring points must not be bent. Individual bent water inlet and outlet pipes 16 need to be measured for water resistance separately. The diameter of the air inlet pressure measuring tube 10 and the air outlet pressure measuring tube 7 should be 2mm. The pipes at the measuring points must not be bent. Individual bent inlet and outlet pipes need to be measured for air resistance separately. In practical applications, the distance between the inlet water pressure measuring pipe 19 and the inlet of the water-cooled heat sink 13 is 0-100mm; the distance between the outlet water pressure measuring pipe 14 and the outlet of the water-cooled heat sink 13 is 50mm; the distance between the air inlet pressure measuring pipe 10 and the air inlet of the air-cooled heat sink 6 is 0-200mm; and the distance between the outlet air pressure measuring pipe 7 and the outlet of the air-cooled heat sink 6 is 0-200mm.

[0060] The temperature detector inside the water inlet pipe 17 is the water inlet temperature detector 18, located near the water inlet of the water-cooled heat sink 13, with its sensing head positioned at the center of the water inlet pipe 17. The temperature detector inside the water outlet pipe 16 is the water outlet temperature detector 15, located near the water outlet of the water-cooled heat sink 13, with its sensing head positioned at the center of the water outlet pipe 16. The temperature detector inside the air inlet pipe 11 is the air inlet temperature detector 12, located near the air inlet of the air-cooled heat sink 6, with its sensing head positioned at the center of the air inlet pipe 11. The temperature detector inside the air outlet pipe 9 is the air outlet temperature detector 8, located near the air outlet of the air-cooled heat sink 6, with its sensing head positioned at the center of the air outlet pipe 9. This installation method facilitates accurate temperature measurement and improves the accuracy of the test data.

[0061] The heat medium circulation device includes a flow meter 23, a hot water pump 27, and a hot water tank 28. The water-cooled heat sink 13, the inlet pipe 17, the flow meter 23, the hot water pump 27, the hot water tank 28, and the outlet pipe 16 are connected in sequence through pipes. The hot water tank 28 is an insulated hot water tank with a volume greater than 1 cubic meter. To ensure stable water temperature during the test, the heating method in the hot water tank 28 can be electric heating tubes, and the pipes are insulated pipes. The flow rate of the hot water pump 27 should ensure that the water flow velocity in the radiator pipe reaches the maximum value of 1m / s. The water flow rate can be adjusted by frequency conversion or shut-off valve. The flow meter 23 and the hot water pump 27 are both connected to the controller. The air compression heating device includes a compressor 25, a hot-side flow meter 2423, a flow controller 22, and a heater 20. The compressor 25, the hot-side flow meter 2423, the flow controller 22, the heater 20, the intercooler, the air inlet pipe 11, and the intercooler are connected in sequence through air pipes. The compressor 25, the hot-side flow meter 2423, the flow controller 22, and the heater 20 are all connected to the controller. The heater 20 is a heater that can adjust the heating temperature, and the air pipes mentioned above are insulated air pipes. A pressure controller is connected to the air outlet pipe 9, and the pressure controller is connected to the controller.

[0062] In practical applications, the structure of the air outlet end of the air inlet duct 1 and the air outlet duct 31 is not limited to a cylindrical shape, but can also be a cuboid shape. When the air outlet end of the air inlet duct 1 and the air outlet duct 31 are cuboid shapes, the above-mentioned D is half of the sum of the height and width of the air inlet duct 1 or the air outlet duct 31.

[0063] like Figure 1 As shown, in some embodiments of this application, a flexible connecting pipe 29, including a corrugated pipe, connects the air outlet duct 31 and the fan 26. During operation, the fan 26 generates mechanical vibrations. If these vibrations are not isolated, they will be transmitted to the entire wind tunnel system, leading to fatigue damage to structural components or affecting test accuracy. The flexible connecting pipe 29, through its elastic properties, can effectively absorb and buffer the vibrations generated by the fan 26, thereby reducing the impact on other components.

[0064] In high-temperature environments, the materials of the fan 26 and the pipes will undergo thermal expansion, which may lead to stress concentration or even rupture at rigid connections. Corrugated pipes, due to their extensibility and flexibility, can adapt to length changes caused by temperature variations, thus avoiding damage caused by thermal expansion.

[0065] The corrugated pipe also helps the airflow to enter the outlet duct 31 smoothly from the fan 26, reducing airflow disturbance and turbulence caused by rigid connection, and ensuring the uniformity and stability of the airflow, which is crucial for the accurate measurement of parameters such as wind speed and pressure.

[0066] In some embodiments of this application, the bellows includes multiple crest sections, transition sections, and trough sections. Along the axial direction of the bellows, the crest sections and trough sections are alternately connected by transition sections. The axial cross-sectional profile of the transition section is S-shaped, and the crest sections, trough sections, and transition sections are integrally formed. The S-shaped design of the transition sections allows for uniform stress distribution under external pressure or internal expansion, avoiding the risk of material fatigue or fracture due to stress concentration at a single location. The S-shaped design enables the bellows to deform more smoothly under stress, reducing the possibility of localized stress concentration. The integrally formed structure of the crest sections, trough sections, and transition sections ensures the overall integrity and continuity of the entire bellows. This design enhances the flexibility of the bellows, allowing it to freely expand, contract, and bend under different installation conditions and operating states, adapting to complex mechanical movements and thermal expansion requirements. The special structure of the bellows facilitates smooth airflow transitions, reducing the generation of turbulence and eddies. Especially at the connection between the fan 26 and the air outlet 31, the corrugated pipe can effectively guide the airflow smoothly into the air outlet 31, ensuring the uniformity and stability of the airflow.

[0067] In some embodiments of this application, the depth-of-wave coefficient K of the bellows ranges from 0.15 to 0.3, and the ratio between the wall thickness and inner diameter of the bellows ranges from 0.01 to 0.05. The depth-of-wave coefficient refers to the ratio of the height of the corrugations (distance from crest to trough) to the corrugation pitch (distance between two adjacent crests or troughs). By setting an appropriate depth-of-wave coefficient K value, an optimal balance can be found between the flexibility and structural strength of the bellows. A higher K value increases the flexibility of the bellows, enabling it to better absorb vibrations generated by the fan 26 and compensate for thermal expansion caused by temperature changes. A lower K value enhances the rigidity of the bellows, making it suitable for stable support under high-pressure environments. A reasonable wall thickness-to-inner diameter ratio ensures that the bellows has sufficient strength and durability under different operating conditions. A larger ratio improves pressure resistance, while a smaller ratio enhances flexibility, allowing the bellows to adapt to complex installation and operating environments.

[0068] In some embodiments of this application, the wall of the corrugated pipe includes at least one of a GH4169 high-temperature alloy layer, a nickel alloy layer, and a nanocomposite layer.

[0069] GH4169 is a nickel-based superalloy with excellent high-temperature strength, oxidation resistance, and corrosion resistance. It maintains good mechanical properties at temperatures up to 700°C and even higher. In automotive cooling module performance testing, especially when the system needs to simulate high-temperature environments, the GH4169 high-temperature alloy layer ensures that the bellows does not soften or deform under high-temperature conditions, thus maintaining its structural integrity and sealing performance.

[0070] Nickel alloys typically contain nickel and other alloying elements (such as chromium and molybdenum), exhibiting excellent corrosion resistance and high-temperature stability. They perform well in a variety of corrosive media and maintain high strength even at high temperatures. Nickel alloy coatings are suitable for environments containing corrosive gases or liquids, such as certain chemical reactions or waste gas treatment processes. This coating effectively prevents bellows from failing due to corrosion, extending its service life.

[0071] Nanocomposite materials, composed of nanoscale particles and a matrix material, possess superior mechanical properties, wear resistance, and fatigue resistance. These nanoparticles enhance the overall properties of the material at the microscale, providing better resistance to crack propagation. Nanocomposite layers are particularly suitable for applications requiring high wear resistance and fatigue resistance. They can significantly improve the durability of bellows, reducing the risk of material fatigue and damage due to repeated bending or vibration.

[0072] like Figure 1 As shown, in some embodiments of this application, a noise monitoring sensor 43 is installed near the flexible connecting pipe 29. The reason for installing the noise monitoring sensor 43 near the flexible connecting pipe 29 is that this is the transition area between the fan 26 and the air outlet duct 31, and also the area most susceptible to vibration and airflow. By monitoring noise here, the noise characteristics generated by the fan 26 during operation can be captured more accurately. The noise monitoring sensor 43 is typically connected to a central control system or data acquisition unit for further analysis and processing of the collected data. This data can help identify abnormal noise patterns, thereby determining whether the fan 26 is operating normally.

[0073] By continuously monitoring noise levels, it is possible to promptly detect mechanical faults or imbalances in the fan 26. For example, abnormal noise may indicate bearing wear, blade damage, or other internal problems, which, if not addressed in time, could lead to more serious malfunctions or shutdowns. Based on the analysis of noise data, the operating parameters of the fan 26 can be optimized, such as adjusting the speed or changing the air intake, to reduce noise and improve overall efficiency.

[0074] One of the main functions of the flexible connecting pipe 29 is to absorb the vibration of the fan 26 and prevent it from being transmitted to other components. By comparing the changes in noise levels before and after installation, the effectiveness of the flexible connecting pipe 29 in reducing noise can be verified, and the design can be adjusted accordingly to further optimize its performance. If noise monitoring data shows abnormal high-frequency noise or a sudden increase in noise level, this may be an indication that the flexible connecting pipe 29 or other related components are loose or damaged, requiring timely inspection and maintenance.

[0075] like Figure 1As shown, in some embodiments of this application, a humidity control module 44 is provided at the air inlet end of the air inlet duct 1; the humidity control module 44 includes an air handling unit and a humidity sensor. The air handling unit is used to humidify or dehumidify the air entering the air inlet duct 1, and the humidity sensor is used to monitor the relative humidity level of the air entering the air inlet duct 1 in real time.

[0076] This design aims to accurately simulate different humidity conditions, ensuring that automotive cooling module performance tests can be conducted under various real-world operating conditions.

[0077] When it is necessary to increase the humidity of the air entering the air intake duct 1, the air handling unit can add moisture to the air through a humidifier, thereby increasing the relative humidity level of the air. This is typically achieved through methods such as evaporation, ultrasonic atomization, or steam injection.

[0078] When it is necessary to reduce the humidity in the air, an air handling unit can use a dehumidifier to remove moisture from the air and lower its relative humidity. Common dehumidification methods include condensation dehumidification and adsorption dehumidification.

[0079] A humidity sensor is installed at the air inlet of the air inlet duct 1 to monitor the relative humidity level of the air entering the system in real time. These sensors provide accurate data feedback, helping the control system adjust the operating status of the air handling unit according to the set target humidity value. The humidity sensor is usually connected to a central control system, which automatically adjusts the operating parameters of the air handling unit (such as the power of the humidifier or dehumidifier) ​​based on the data provided by the sensor to maintain the required humidity level.

[0080] The humidity control module 44 allows for precise simulation of humidity levels under various climatic conditions in the laboratory, ranging from dry to high humidity environments. This is crucial for comprehensively evaluating the performance of automotive cooling modules under different climatic conditions. The cooling efficiency of radiators and intercoolers may vary under different humidity conditions. The humidity control module 44 enables researchers to conduct tests under specific humidity conditions, thereby obtaining more accurate performance data.

[0081] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0082] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0083] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wind tunnel test rig suitable for performance testing of automotive heat dissipation modules, wherein the automotive heat dissipation module includes air-cooled heat dissipation components and water-cooled heat dissipation components, characterized in that, include: Air intake duct; Air duct; A diffusion transition section, wherein the small end of the diffusion transition section is connected to the air outlet of the air inlet duct, and the large end of the diffusion transition section is connected to the air-cooled heat sink. A convergent transition section, wherein the small end of the convergent transition section is connected to the air inlet of the air outlet, and the large end of the convergent transition section is connected to the water-cooled heat sink. The air inlet duct, the diffusion transition section, the air-cooled heat sink, the water-cooled heat sink, the convergence transition section, and the air outlet duct are arranged sequentially along the wind direction. The air inlet duct has a first flange at its outlet edge, and the diffuser transition section has a second flange at its small opening edge that abuts the first flange. A sealing gasket is provided between the mating surfaces of the first flange and the second flange. A third flange is formed at the edge of the air inlet end of the air outlet duct, and a fourth flange is formed at the edge of the small opening end of the converging transition section, which is mated to the third flange. A sealing gasket is provided between the mating surfaces of the third flange and the fourth flange.

2. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 1, characterized in that, Between the air inlet duct and the air outlet duct, there are water inlet pipes and water outlet pipes for connecting to the water-cooled heat sink, and air inlet pipes and air outlet pipes for connecting to the air-cooled heat sink. Temperature detectors are installed in the water inlet pipe, the water outlet pipe, the air inlet pipe, and the air outlet pipe. The air inlet duct is equipped with a wind speed measuring device, an air inlet temperature detector, and a wind resistance measuring device at its air outlet end. The air outlet duct is equipped with a wind resistance measuring device, an air outlet temperature detector, and an adjustable wind speed fan. The fan is located at the air outlet end of the air outlet duct. Pressure measuring pipes are connected to the air inlet pipe, air outlet pipe, water inlet pipe, and water outlet pipe. An air compression heating device is also connected to the air inlet pipe, and a heat medium circulation device is connected between the water inlet pipe and the water outlet pipe. The aforementioned temperature detector, inlet air temperature detector, outlet air temperature detector, Pitot tube device, air resistance measuring device, fan, air compression heating device and heat medium circulation device are all connected to the controller.

3. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 2, characterized in that, The diffusion angle of the diffusion transition section is 0 to 8°, and the convergence angle of the convergence transition section is 0 to 15°.

4. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 3, characterized in that, The air inlet end of the air inlet duct is double-twisted, and the air outlet end of the air inlet duct is cylindrical or cuboid. The air outlet duct is cylindrical or rectangular; A rectifier mesh is installed between the air inlet end and the air outlet end of the air inlet duct, and a rectifier grille is installed inside the air outlet end of the air outlet duct. The air outlet duct and the fan are flexibly connected.

5. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 4, characterized in that, A flexible connecting pipe, including a corrugated pipe, connects the air outlet duct and the fan.

6. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 5, characterized in that, The corrugated pipe includes multiple crest sections, transition sections, and trough sections. Along the axial direction of the corrugated pipe, the crest sections and trough sections are alternately connected by the transition sections. The axial cross-sectional profile of the transition section is S-shaped. The crest sections, trough sections, and transition sections are integrally formed structures.

7. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 6, characterized in that, The depth coefficient K of the corrugated pipe is 0.15 to 0.3, and the ratio between the wall thickness and the inner diameter of the corrugated pipe is 0.01 to 0.

05.

8. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 5, characterized in that, The wall of the corrugated pipe includes at least one of a GH4169 high-temperature alloy layer, a nickel alloy layer, and a nanocomposite layer.

9. The wind tunnel test rig for testing the performance of automotive heat dissipation modules according to claim 5, characterized in that, A noise monitoring sensor is installed near the flexible connecting pipe.

10. A wind tunnel test rig for testing the performance of automotive heat dissipation modules according to any one of claims 1 to 9, characterized in that, The air inlet end of the air inlet duct is equipped with a humidity control module; The humidity control module includes an air handling unit and a humidity sensor. The air handling unit is used to humidify or dehumidify the air entering the air inlet duct, and the humidity sensor is used to monitor the relative humidity level of the air entering the air inlet duct in real time.

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