A test apparatus and wind tunnel facility

Abstract

The application discloses a test device and a wind tunnel equipment, and belongs to the technical field of wind tunnel test. The test device comprises a fan with an air outlet, a shell assembly with a first containing cavity, an input port and a sample cavity, the input port and the sample cavity are both communicated with the first containing cavity, the input port is communicated with the air outlet, and the sample cavity is used for placing a sample. A nozzle assembly is located in the first containing cavity and connected with the shell assembly. The nozzle assembly has a flow channel communicated with the input port and the first containing cavity respectively, and one end of the flow channel away from the input port is arranged towards the sample cavity. Since one end of the flow channel away from the input port is arranged towards the test cavity, the airflow discharged from the flow channel can blow towards the sample arranged in the test cavity. The airflow directly impacts the sample, so that the sample receives a large impact force and a wide impact area, the anti-escape performance of the sample can be tested more effectively, and the test effect is improved.

Description

Technical Field

[0001] This application belongs to the field of wind tunnel testing technology, and specifically relates to a testing device and wind tunnel equipment. Background Technology

[0002] A wind tunnel is an experimental device used to study airflow and its interaction with objects. It generates high-speed airflow within a closed duct and simulates aerodynamic conditions (such as speed, pressure, and temperature) in a real environment to test the performance of aircraft, automobiles, or other equipment under different aerodynamic states. However, existing wind tunnel equipment is relatively ineffective in testing the anti-escape performance of materials. Utility Model Content

[0003] Purpose of the utility model: The embodiments of this application provide a test device and wind tunnel equipment, which aims to overcome the technical problem that the wind tunnel has poor test effect on the anti-escape performance of materials.

[0004] Technical solution: The experimental apparatus described in this application includes:

[0005] The fan has an air outlet;

[0006] The shell assembly has a first receiving cavity, an inlet and a sample cavity, wherein the inlet and the sample cavity are both connected to the first receiving cavity, the inlet is connected to the air outlet, and the sample cavity is used to place a sample;

[0007] The nozzle assembly is located in the first receiving cavity and connected to the shell assembly. The nozzle assembly has a flow channel that communicates with the input port and the first receiving cavity respectively. The end of the flow channel away from the input port is disposed towards the sample cavity.

[0008] In some embodiments, the nozzle assembly includes:

[0009] A first guide section has a first channel, and the dimension L1 of the first channel gradually decreases along a first direction in a second direction;

[0010] The second guide section is connected to the side of the first guide section away from the input port. The second guide section has a second channel along the first direction. The dimension L2 of the second channel in the second direction remains unchanged. The second channel communicates with the first channel to form the flow channel.

[0011] The mounting part is connected to the side of the first flow guide portion away from the second flow guide portion, and the mounting part is detachably connected to the shell assembly.

[0012] In some embodiments, the first receiving cavity has a bottom wall, and the first flow guide has an inclined plate on the side facing the bottom wall, wherein the distance L3 from the inclined plate to the bottom wall gradually increases along the first direction in the second direction.

[0013] In some embodiments, the shell assembly includes:

[0014] A first housing, the first receiving cavity and the input port are disposed on the first housing, and the first housing has a through hole communicating with the first receiving cavity;

[0015] The second housing is disposed outside the first receiving cavity and covers the through hole. The second housing is detachably connected to the first housing. The second housing has a second receiving cavity, and the second receiving cavity and the through hole form the sample cavity.

[0016] In some embodiments, the second housing includes a body portion and a flange portion. The body portion has a second receiving cavity. The flange portion is disposed around the body portion. The body portion is detachably connected to the first housing via the flange portion. Along a second direction, the outer contour of the orthographic projection of the through hole is located on the flange portion, so that the flange portion overlaps at least part of the sample.

[0017] In some embodiments, the fan further includes an air inlet, and the housing assembly further includes:

[0018] The third housing has a third receiving cavity and an output port communicating with the third receiving cavity, the output port being connected to the air inlet;

[0019] A connecting member is connected to the first housing and the third housing respectively, and the connecting member is used to connect the first receiving cavity and the third receiving cavity.

[0020] In some embodiments, the test apparatus further includes a filter element located within the third receiving cavity and connected to the third housing, for filtering gas in the third receiving cavity.

[0021] In some embodiments, at least a portion of the connecting member is disposed on the side of the first housing opposite to the fan, and at least a portion of the connecting member is disposed on the side of the third housing opposite to the fan.

[0022] In some embodiments, the testing apparatus further includes:

[0023] The first pipe fitting is disposed between the fan and the first housing, and is used to connect the inlet and the outlet.

[0024] The second pipe fitting is disposed between the fan and the third housing, and is used to connect the output port and the air inlet.

[0025] In some embodiments, the shell assembly further includes at least one first connector extending along a first direction, the first shell and the third shell being located on opposite sides of the first connector in the third direction and being detachably connected to the first connector.

[0026] In some embodiments, the shell assembly further includes at least one second connector extending along a third direction, wherein the first shell and the third shell are located on one side of the second connection in the second direction and are detachably connected to the second connector.

[0027] This application also provides a wind tunnel device, including the testing apparatus described in any one of the above-mentioned embodiments.

[0028] Beneficial Effects: The test apparatus of this application embodiment includes: a fan with an air outlet; a shell assembly with a first receiving cavity, an inlet, and a sample cavity, wherein the inlet and the sample cavity are both connected to the first receiving cavity, the inlet is connected to the air outlet, and the sample cavity is used to place a sample; and a nozzle assembly located within the first receiving cavity and connected to the shell assembly, the nozzle assembly having a flow channel connected to both the inlet and the first receiving cavity, with one end of the flow channel away from the inlet facing the sample cavity. Because the end of the flow channel away from the inlet faces the test cavity, the airflow discharged from the flow channel can blow onto the sample placed in the sample cavity. By directly impacting the sample with the airflow, the sample receives a larger impact force and a wider impact area, which can more effectively test the sample's anti-escape performance and improve the test results. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of the test apparatus according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the nozzle assembly according to an embodiment of this application;

[0032] Figure 3 This is a top view of the test apparatus according to an embodiment of this application;

[0033] Figure 4 Examples of this application Figure 3A cross-sectional view along the AA direction;

[0034] Figure 5 This is a schematic diagram of the structure of the second shell in an embodiment of this application;

[0035] Figure 6 Examples of this application Figure 3 A cross-sectional view along the AA direction, showing a sample placed inside the sample cavity;

[0036] Figure 7 This is a schematic diagram of the structure of a sample from an embodiment of this application;

[0037] Figure 8 Examples of this application Figure 3 Cross-sectional view along the BB direction.

[0038] Explanation of reference numerals in the attached drawings: 10-Fan; 11-Outlet; 12-Inlet; 20-Shell assembly; 21-First receiving cavity; 211-Bottom wall; 22-Inlet; 23-Sample cavity; 24-First housing; 241-Through hole; 25-Second housing; 251-Second receiving cavity; 252-Main body; 253-Flanged part; 26-Third housing; 261-Third receiving cavity; 262-Outlet; 27-Connecting part; 2 8-First connector; 29-Second connector; 30-Nozzle assembly; 31-Flow channel; 32-First guide section; 321-First channel; 322-Inclined plate; 33-Second guide section; 331-Second channel; 34-Mounting part; 40-Filter element; 50-Sample; 51-Sample body; 52-Protective membrane; 60-First fitting; 70-Second fitting; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that 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. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0041] A wind tunnel is an experimental device used to study airflow and its interaction with objects. It generates high-speed airflow within a closed duct and simulates aerodynamic conditions (such as speed, pressure, and temperature) in a real environment to test the performance of aircraft, automobiles, or other equipment under different aerodynamic states. With the development of science and technology, the demand for large wind tunnels is increasingly evident in certain fields. The commissioning of each large wind tunnel project involves a significant investment of human and material resources. To ensure the project achieves its expected goals, numerous verification tests need to be completed during the research and development of acoustic materials for large wind tunnels. These verification tests require simulating conditions such as airflow velocity, airflow angle, and airflow temperature in a large wind tunnel. Building a 1:1 scale large wind tunnel is extremely costly, and even wind tunnels using modular test specimens remain expensive. Furthermore, when existing wind tunnel testing equipment tests acoustic material samples, the airflow direction is parallel to the sample surface, resulting in poor wind effect on the sample surface and an inability to effectively test the sample's anti-escape performance (because the air pulses during the blowing process can cause a portion of the sample to detach from the body; anti-escape performance refers to the ability to prevent material from being blown away from the sample; the sample's mass can be measured before and after the test, and the change in mass before and after the test can be compared to see if it is within a reasonable range; if it is within a reasonable range, the sample meets the test requirements and has good anti-escape performance).

[0042] In view of the above, this application provides a test apparatus and a wind tunnel device to overcome at least one of the above-mentioned technical problems. In this embodiment, the first direction X is the length direction of the first housing 24, the second direction Y is the height direction of the first housing 24, and the third direction Z is the width direction of the first housing 24.

[0043] Please see Figure 1 , Figure 2 and Figure 4 In this embodiment of the application, the test device includes a fan 10, a shell assembly 20, and a nozzle assembly 30.

[0044] The fan 10 has an air outlet 11. The housing assembly 20 has a first receiving cavity 21, an inlet 22, and a sample cavity 23. Both the inlet 22 and the sample cavity 23 are connected to the first receiving cavity 21. The inlet 22 is connected to the air outlet 11. The sample cavity 23 is used to place the sample 50. The nozzle assembly 30 is located in the first receiving cavity 21 and is connected to the housing assembly 20. The nozzle assembly 30 has a flow channel 31, which is connected to both the inlet 22 and the first receiving cavity 21. The end of the flow channel 31 away from the inlet 22 is positioned towards the sample cavity 23.

[0045] It is understandable that the test apparatus in this application simulates the structure of a wind tunnel and can be set to a smaller volume while still achieving the test effect, and can save materials and reduce costs. The test apparatus includes a fan 10, a shell assembly 20, and a nozzle assembly 30. The air outlet 11 on the fan 10 and the inlet 22 on the shell assembly 20 are connected, so that the airflow generated by the fan 10 can enter the first receiving cavity 21 through the air outlet 11 and the inlet 22, impacting the test sample 50 in the first receiving cavity 21 to test the escape prevention performance of the test sample 50. The sample 50 is placed in the sample cavity 23, which is connected to the first receiving cavity 21. The nozzle assembly 30 is also provided inside the first receiving cavity 21. The nozzle assembly 30 has a hollow structure and forms a flow channel 31 for airflow. The flow channel 31 is connected to the inlet 22 and the first receiving cavity 21, so that the air entering from the inlet 22 can enter the first receiving cavity 21 through the flow channel 31. Because the end of the flow channel 31 furthest from the inlet 22 is positioned towards the sample cavity 23, the airflow exiting the flow channel 31 can be directed towards the sample 50 positioned within the sample cavity 23. By directly impacting the sample 50 with the airflow, the sample 50 experiences a greater impact force and a wider impact area, allowing for a more effective test of the sample 50's anti-escape performance and improving the test results.

[0046] During the test, the power of the fan 10 can be controlled by the frequency converter control system, thereby changing the air velocity at the outlet 11. This allows for testing the anti-escape performance of the sample 50 under different air velocities. Since the sample 50 consists of a sample body 51 and a protective membrane 52, the anti-escape performance of both the sample body 51 and the protective membrane 52 can be tested simultaneously (the protective membrane 52 has a porous structure, allowing airflow to impact the sample body 51 through the gaps). The sample 50 is generally installed in the sample cavity 23 using a riveting structure, self-tapping screws, etc. Changing the air velocity can also test whether the sample 50 is securely installed in the sample cavity 23.

[0047] Please see Figure 2 In conjunction with the above embodiments, in some embodiments, the nozzle assembly 30 includes a first flow guide 32, a second flow guide 33, and a mounting portion 34.

[0048] The first flow guide 32 has a first channel 321, and its dimension L1 gradually decreases along the first direction X in the second direction Y. The second flow guide 33 is connected to the side of the first flow guide 32 opposite to the inlet 22. The second flow guide 33 has a second channel 331, and its dimension L2 remains constant along the first direction X in the second direction Y. The second channel 331 communicates with the first channel 321 to form a flow channel 31. A mounting portion 34 is connected to the side of the first flow guide 32 away from the second flow guide 33, and the mounting portion 34 is detachably connected to the housing assembly 20.

[0049] Understandably, a first guide section 32 and a second guide section 33 are provided on the nozzle assembly 30. The first guide section 32 has a first channel 321 inside, one end of which is connected to the inlet 22, allowing the airflow generated by the fan 10 to enter the first channel 321 through the inlet 22. As the dimension L1 of the first channel 321 gradually decreases in the second direction Y, that is, in the first direction X (approximately the direction in which air flows within the first channel 321), the airflow channel narrows, and some air is compressed, causing the airflow velocity to gradually increase. The second guide section 33 is connected to the side of the first guide section 32 away from the inlet 22, and the second channel 331 in the second guide section 33 is connected to the first channel 321, allowing the airflow in the first channel 321 to enter the second channel 331. Since the dimension L2 of the second channel 331 in the second direction Y remains unchanged along the first direction X, the velocity of the airflow will not change significantly when it flows inside the second channel 331. The second channel 331 mainly plays the role of stabilizing the flow velocity and ensuring the flow direction, so that the airflow discharged from the second channel 331 impacts the sample 50 at a higher velocity, thereby improving the test effect on the anti-escape performance of the sample 50.

[0050] Please see Figure 3 and Figure 4 In conjunction with the above embodiments, in some embodiments, the first receiving cavity 21 has a bottom wall 211, and the first guide portion 32 has an inclined plate 322 on the side facing the bottom wall 211. Along the first direction X, the distance L3 from the inclined plate 322 to the bottom wall 211 in the second direction Y gradually increases.

[0051] It is understandable that, along the first direction X, the distance L3 from the inclined plate 322 on the first guide section 32 to the bottom wall 211 in the second direction Y gradually increases. This arrangement makes the channel for airflow in the first guide section 32 gradually narrow, increasing the airflow velocity. On the other hand, since the inclined plate 322 can be regarded as extending obliquely upward along the first direction X, when the second guide section 33 is connected to one side of the first guide section 32, the second guide section 33 has a higher height, which makes it convenient to bend at the connection between the first guide section 32 and the second guide section 33, thereby providing more space to change the direction of the flow channel, so that the airflow in the second guide section 33 can be discharged towards the sample cavity 23.

[0052] Please see Figure 4 In conjunction with the above embodiments, in some embodiments, the shell assembly 20 includes a first shell 24 and a second shell 25.

[0053] A first receiving cavity 21 and an input port 22 are disposed on a first housing 24, and the first housing 24 has a through hole 241 communicating with the first receiving cavity 21. A second housing 25 is disposed outside the first receiving cavity 21 and covers the through hole 241. The second housing 25 is detachably connected to the first housing 24, and the second housing 25 has a second receiving cavity 251. The second receiving cavity 251 and the through hole 241 form a sample cavity 23.

[0054] It is understood that the shell assembly 20 may include a first shell 24 and a second shell 25. A first receiving cavity 21 and an inlet 22 are both located on the first shell 24. The fan 10 is connected to the first shell 24, allowing the airflow provided by the fan 10 to enter the first receiving cavity 21. A through hole 241 is also provided on the first shell 24, which connects the first receiving cavity 21 and the second receiving cavity 251 on the second shell 25, allowing the airflow in the first receiving cavity 21 to enter the second receiving cavity 251, thereby impacting a portion of the sample 50 located in the second receiving cavity 251 to test the escape prevention performance of the sample 50. The second receiving cavity 251 and the through hole 241 combine to form a sample cavity 23, where the sample 50 can be completely disposed within the second receiving cavity 251; or it can be disposed as follows: Figure 6 As shown, part of it is disposed in the second receiving cavity 251 and part of it is disposed in the through hole 241; it can also be partially disposed in the second receiving cavity 251 and the through hole 241, and part of it protrudes into the first receiving cavity 21, all of which can be used to test the sample 50.

[0055] Please see Figure 4 and Figure 5 In conjunction with the above embodiments, in some embodiments, the second housing 25 includes a body portion 252 and a flange portion 253. The body portion 252 has a second receiving cavity 251, and the flange portion 253 is disposed around the body portion 252. The body portion 252 is detachably connected to the first housing 24 through the flange portion 253. Along the second direction Y, the outer contour of the orthographic projection of the through hole 241 is located on the flange portion 253, so that the flange portion 253 overlaps at least part of the sample 50.

[0056] It is understood that the second housing 25 can be detachably connected to the first housing 24 via the flange 253 on the second housing 25 (e.g., by bolts, clips, etc.), so that the opening of the second receiving cavity 251 faces the through hole 241. When the sample 50 is placed in the sample cavity 23, since the sample cavity 23 is composed of the second receiving cavity 251 and the through hole 241, a part of the sample 50 is located in the second receiving cavity 251 and the other part is located in the through hole 241. Preferably, the sample body 51 on the sample 50 is disposed in the second receiving cavity 251, and the protective film 52 on the sample 50 is disposed in the through hole 241. The upper surface of the protective film 52 is on the same horizontal plane as the upper surface of the bottom wall 211, so that the airflow can flow relatively smoothly in the first receiving cavity 21. This avoids the phenomenon of turbulence caused by the upper surface of the protective film 52 being blocked by the protective film 52 or the inner wall of the through hole 241 during the flow process because the upper surface of the protective film 52 and the upper surface of the bottom wall 211 are not on the same horizontal plane. Since the outer contour of the orthographic projection of the through hole 241 along the second direction Y is located on the flange 253, the opening size of the second housing 25 is smaller than the opening size of the through hole 241, so that when the sample 50 is placed in the sample cavity 23, part of the protective film 52 overlaps with the flange 253 (e.g., Figure 6 and Figure 7 As shown in the figure, this arrangement can increase the connection area between the protective film 52 and the second housing 25, reduce the difficulty of connecting the protective film 52 and the second housing 25, and facilitate the installation of the protective film 52.

[0057] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, the fan 10 also has an air inlet 12, and the shell assembly 20 also includes a third shell 26 and a connecting member 27.

[0058] The third housing 26 has a third receiving cavity 261 and an output port 262 communicating with the third receiving cavity 261. The output port 262 is communicating with the air inlet 12. The connecting member 27 is connected to the first housing 24 and the third housing 26 respectively. The connecting member 27 is used to connect the first receiving cavity 21 and the third receiving cavity 261.

[0059] It is understandable that the shell assembly 20 is also provided with a third shell 26 and a connecting member 27. The connecting member 27 can be an arc-shaped or C-shaped pipe. The connecting member 27 is used to connect the first receiving cavity 21 on the first shell 24 and the third receiving cavity 261 on the third shell 26, so that the airflow in the first receiving cavity 21 can enter the third receiving cavity 261 through the connecting member 27, and then enter the fan 10 through the outlet 262 and the air inlet 12, thereby forming an airflow circulation. Because the test device has a simple structure, its volume can be set to be small as needed. The airflow flows at high speed in the circulation path of the test device, which can rapidly raise the temperature inside the shell assembly 20 in a short time (the high-speed airflow generates high temperature by friction with the internal structure of the device), thereby reaching the temperature required for the test, without the need for a heating device, thus simplifying the structure. This structure can simulate a high-temperature test environment and can test the aging rate of the sample body 51 and the protective film 52 on the sample 50 at the corresponding temperature (the aging of materials can be accelerated in a high-temperature environment).

[0060] Please see Figure 1 and Figure 8 In conjunction with the above embodiments, in some embodiments, the test apparatus further includes a filter element 40, which is located in the third receiving cavity 261 and connected to the third housing 26, for filtering the gas in the third receiving cavity 261.

[0061] It is understandable that a filter element 40 can also be installed inside the third receiving cavity 261. The filter element 40 is generally installed at the output port 262. Before the air in the third receiving cavity 261 passes through the output port 262, it needs to be filtered by the filter element 40 to remove some impurities in the air, ensure the cleanliness of the circulating air, and avoid these impurities from affecting the fan 10 and the test of the anti-escape performance of the sample 50.

[0062] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, at least a portion of the connecting member 27 is disposed on the side of the first housing 24 away from the fan 10, and at least a portion of the connecting member 27 is disposed on the side of the third housing 26 away from the fan 10.

[0063] It is understandable that the fan 10 and the connecting member 27 are respectively located on both sides of the first housing 24 and the third housing 26 along the first direction X, so that the fan 10 and the connecting member 27 are far apart. The airflow generated by the fan 10 will take a long time to enter the interior of the connecting member 27. In other words, the length of the airflow circulation path is increased, so that the airflow rubs against the internal structure of the housing assembly 20 as much as possible, ensuring that the interior of the housing assembly 20 can heat up quickly, improving the heating efficiency, and enabling the device to provide a certain temperature environment in a short time.

[0064] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, the test apparatus further includes a first pipe fitting 60 and a second pipe fitting 70.

[0065] The first pipe fitting 60 is disposed between the fan 10 and the first housing 24, and the connection is made by a flange and sealed by a sealing structure. The first pipe fitting 60 is used to connect the inlet 22 and the outlet 11. The second pipe fitting 70 is disposed between the fan 10 and the third housing 26, and the connection is also made by a flange and sealed by a sealing structure. The second pipe fitting 70 is used to connect the outlet 262 and the inlet 12.

[0066] Understandably, the first pipe 60 and the second pipe 70 facilitate the connection between the fan 10 and the housing assembly 20. The shape and length of the first pipe 60 and the second pipe 70 are not limited; it is sufficient that the air outlet 11 is connected to the inlet 22 on the first housing 24, and the air inlet 12 is connected to the outlet 262 on the third housing 26. The arrangement of the first pipe 60 and the second pipe 70 also increases the length of the airflow circulation path to a certain extent, allowing the airflow to rub against more structures during its flow, thereby improving the efficiency of temperature rise.

[0067] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, the shell assembly 20 further includes at least one first connector 28, the first connector 28 extending along a first direction X, the first shell 24 and the third shell 26 being located on both sides of the first connector 28 in the third direction Z, and being detachably connected to the first connector 28 respectively.

[0068] It is understood that the first housing 24 and the third housing 26 can be spaced apart along the third direction Z, and can be connected by a first connector 28. The first connector 28 can be a square metal tube, a connecting block, or other structure. The first housing 24 and the third housing 26 are respectively connected to the first connector 28 on both sides along the third direction Z, so that the first housing 24 and the third housing 26 can be connected into a whole, which is convenient for handling. The first connector 28 can extend along the first direction X, which can increase its own length, thereby increasing the connection area with the first housing 24 and the third housing 26 and improving the stability of the connection. There can be multiple first connectors 28, which are arranged at intervals along the second direction Y. All the first connectors 28 are located between the first housing 24 and the third housing 26, which can further improve the stability of the connection between the first housing 24 and the third housing 26.

[0069] Please see Figure 1 , Figure 4and Figure 8 In conjunction with the above embodiments, in some embodiments, the shell assembly 20 further includes at least one second connector 29. The second connector 29 extends along a third direction Z, and the first shell 24 and the third shell 26 are located on the side of the second connection in the second direction Y, and are detachably connected to the second connector 29. The second connector 29 can extend along a third direction Z, thereby increasing the connection area with the first shell 24 and the third shell 26 and improving the stability of the connection. Furthermore, there can be multiple second connectors 29, which can be arranged at intervals along the first direction X. The connection of multiple second connectors 29 can further improve the stability of the connection between the first shell 24 and the third shell 26.

[0070] It is understood that the first housing 24 and the third housing 26 can be connected by the second connector 29. The second connector 29 can also be a square metal tube, a connecting block, or other structures. Both the first housing 24 and the third housing 26 are located on one side of the second connector 29 along the second direction Y, which can connect the two into a whole, facilitating handling and movement.

[0071] This application also provides a wind tunnel device, including the test apparatus described above, which has all the technical features and beneficial effects of the test apparatus, and will not be described in detail here.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0073] The experimental apparatus and wind tunnel equipment provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A testing apparatus, characterized in that, include: A fan (10) has an air outlet (11); The shell assembly (20) has a first receiving cavity (21), an inlet (22) and a sample cavity (23). The inlet (22) and the sample cavity (23) are both connected to the first receiving cavity (21). The inlet (22) is connected to the air outlet (11). The sample cavity (23) is used to place a sample (50). The nozzle assembly (30) is located in the first receiving cavity (21) and connected to the shell assembly (20). The nozzle assembly (30) has a flow channel (31) which is connected to the inlet (22) and the first receiving cavity (21) respectively. The end of the flow channel (31) away from the inlet (22) is disposed towards the sample cavity (23).

2. The experimental apparatus according to claim 1, characterized in that, The nozzle assembly (30) includes: The first guide section (32) has a first channel (321) along the first direction (X), and the size L1 of the first channel (321) gradually decreases in the second direction (Y); The second guide section (33) is connected to the side of the first guide section (32) away from the input port (22). The second guide section (33) has a second channel (331) along the first direction (X). The size L2 of the second channel (331) in the second direction (Y) remains unchanged. The second channel (331) communicates with the first channel (321) to form the flow channel (31). The mounting part (34) is connected to the side of the first guide part (32) away from the second guide part (33), and the mounting part (34) is detachably connected to the shell assembly (20).

3. The experimental apparatus according to claim 2, characterized in that, The first receiving cavity (21) has a bottom wall (211), and the first guide portion (32) has an inclined plate (322) on the side facing the bottom wall (211). Along the first direction (X), the distance L3 from the inclined plate (322) to the bottom wall (211) in the second direction (Y) gradually increases.

4. The experimental apparatus according to claim 1, characterized in that, The shell assembly (20) includes: A first housing (24), the first receiving cavity (21) and the input port (22) are disposed on the first housing (24), and the first housing (24) has a through hole (241) communicating with the first receiving cavity (21); The second housing (25) is disposed outside the first receiving cavity (21) and covers the through hole (241). The second housing (25) is detachably connected to the first housing (24). The second housing (25) has a second receiving cavity (251). The second receiving cavity (251) and the through hole (241) form the sample cavity (23).

5. The test apparatus according to claim 4, characterized in that, The second housing (25) includes a body portion (252) and a flange portion (253). The body portion (252) has a second receiving cavity (251). The flange portion (253) is disposed around the body portion (252). The body portion (252) is detachably connected to the first housing (24) through the flange portion (253). Along the second direction (Y), the outer contour of the orthographic projection of the through hole (241) is located on the flange portion (253) so that the flange portion (253) overlaps at least part of the sample (50).

6. The test apparatus according to claim 4, characterized in that, The fan (10) also has an air inlet (12), and the housing assembly (20) further includes: The third housing (26) has a third receiving cavity (261) and an output port (262) communicating with the third receiving cavity (261), the output port (262) communicating with the air inlet (12); The connecting member (27) is connected to the first housing (24) and the third housing (26) respectively. The connecting member (27) is used to connect the first receiving cavity (21) and the third receiving cavity (261).

7. The experimental apparatus according to claim 6, characterized in that, The test apparatus further includes a filter element (40), which is located in the third receiving cavity (261) and connected to the third housing (26) for filtering the gas in the third receiving cavity (261).

8. The test apparatus according to claim 6, characterized in that, At least a portion of the connecting member (27) is disposed on the side of the first housing (24) away from the fan (10), and at least a portion of the connecting member (27) is disposed on the side of the third housing (26) away from the fan (10).

9. The experimental apparatus according to claim 6, characterized in that, The test apparatus also includes: The first pipe fitting (60) is disposed between the fan (10) and the first housing (24) for connecting the inlet (22) and the outlet (11); The second pipe fitting (70) is disposed between the fan (10) and the third housing (26) for connecting the output port (262) and the air inlet (12).

10. The experimental apparatus according to claim 6, characterized in that, The shell assembly (20) further includes at least one first connector (28) extending along a first direction (X), the first shell (24) and the third shell (26) being located on opposite sides of the first connector (28) in a third direction (Z) and being detachably connected to the first connector (28).

11. The test apparatus according to claim 6 or 10, characterized in that, The shell assembly (20) further includes at least one second connector (29) extending in a third direction (Z), the first shell (24) and the third shell (26) being located on the side of the second connection in the second direction (Y) and being detachably connected to the second connector (29).

12. A wind tunnel device, characterized in that, The test apparatus includes any one of claims 1 to 11.

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