A test device and method for verifying water cooling performance of a high-temperature wind tunnel hot structure

Abstract

This invention discloses an experimental device and method for verifying the water-cooling performance of thermal structures in high-temperature wind tunnels, belonging to the technical field of water-cooling performance testing and evaluation for thermal structures in aerodynamic wind tunnels. This invention verifies and calibrates heat transfer simulation results through experimental means, overcoming the limitations of purely numerical methods, providing reliable input for high-temperature thermal structure design, and effectively improving the realism and accuracy of numerical calculations of heat transfer in water-cooled structures. It includes a cooling water tank, a frequency-controlled water pump, a main valve, a tee, an inlet electromagnetic flowmeter, a test piece, an outlet electromagnetic flowmeter, branch valves, and a heating system. This invention reasonably simplifies the water-cooling flow channel of the high-temperature wind tunnel thermal structure. By building an experimental device and conducting water flow tests on the test piece, it can simulate and reproduce the actual cooling conditions of the water-cooling system, providing reliable experimental data support for the coupled simulation of heat transfer and water-cooling heat dissipation involved in wind tunnel thermal structure design. This invention has a simple structure, saves space, and is reliable and safe.

Description

Technical Field

[0001] This invention belongs to the technical field of water-cooling performance testing and evaluation of thermal structures in aerodynamic wind tunnels, and specifically relates to a test device and method for verifying the water-cooling performance of thermal structures in high-temperature wind tunnels. Background Technology

[0002] In hypersonic wind tunnels, components such as nozzles face severe thermal loads, and their thermal structure design directly determines the flow field quality and operational safety of the wind tunnel. To prevent gas expansion and liquefaction, the total temperature needs to be increased, causing components such as the throat to be subjected to multiple coupled effects of high temperature, high pressure, and corrosion. This places extremely high demands on structural materials, cooling systems, and safety margins, often resulting in a sharp increase in manufacturing costs.

[0003] To ensure the structural strength and safety while controlling costs, the key lies in accurately obtaining the structural temperature boundary. This boundary is mainly affected by two factors: firstly, external gas-solid coupling heat transfer, i.e., the heat input to the structure from high-temperature gas; and secondly, internal liquid-solid coupling heat transfer, i.e., the heat removed from the structure by the cooling system. Currently, relying solely on numerical simulation for multiphysics coupling analysis makes it difficult to ensure the accuracy and realism of the boundary condition calculation results. Summary of the Invention

[0004] The purpose of this invention is to address the problem that relying solely on numerical simulation for multiphysics coupling analysis makes it difficult to ensure the accuracy and authenticity of boundary condition calculation results. This invention provides an experimental device and method for verifying the water-cooling performance of high-temperature wind tunnel thermal structures. By using experimental methods to verify and calibrate heat transfer simulation results, it overcomes the limitations of purely numerical methods, provides reliable input for high-temperature thermal structure design, and effectively improves the authenticity and accuracy of numerical calculations for heat transfer in water-cooled structures.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A test device for verifying the water cooling performance of a high-temperature wind tunnel thermal structure includes a cooling water tank, a frequency-controlled water pump, a main valve, a tee, an inlet electromagnetic flowmeter, a test piece, an outlet electromagnetic flowmeter, branch valves, and a heating system.

[0007] The test piece includes a flow channel model, a top cover, an inlet, an outlet, temperature sensors, an insulating asbestos mesh, a sealing ring, a cooling flow channel, and fasteners. The flow channel model has a cooling flow channel inside. An insulating asbestos mesh and a sealing ring are installed between the flow channel model and the top cover. The flow channel model and the top cover are fixed and sealed by fasteners. The top cover has an inlet and an outlet that communicate with the cooling flow channel. The lower end face of the flow channel model is the heated surface. Multiple temperature sensors are installed between the flow channel model and the top cover to measure the temperature of the heated surface of the flow channel model, the internal cooling water of the flow channel model, and the surface of the top cover. The heating system is installed below the heated surface of the flow channel model.

[0008] The cooling water tank is connected to the inlet of the test piece via a first main pipeline. The first main pipeline is provided with a frequency-controlled water pump, a main valve, a tee, and an inlet electromagnetic flow meter in sequence from the incoming flow direction. The second branch of the tee is connected to the cooling water tank via a bypass pipeline. A branch valve is provided on the bypass pipeline. The outlet of the test piece is connected to the cooling water tank via a second main pipeline. An outlet electromagnetic flow meter is provided on the second main pipeline.

[0009] Furthermore, the first main pipeline, the second main pipeline, and the bypass pipeline are all made of high-temperature resistant stainless steel corrugated hoses.

[0010] Furthermore, the temperature sensor is glued to the flow channel model and the top cover.

[0011] Furthermore, the heating system is a quartz lamp heating device.

[0012] A test method for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure, comprising the following steps:

[0013] S1. Sequentially open the main valve and the frequency converter-controlled water pump;

[0014] S2. Fine-tune the branch valves until the flow rate meets the test requirements;

[0015] S3. Confirm that the cooling water circulates stably in the loop formed by the cooling water tank, the first main pipeline, the bypass pipeline, the test piece, and the second main pipeline.

[0016] S4. Turn on the heating system to heat the test piece;

[0017] S5. Collect temperature and flow data of the test specimen under different heating and cooling conditions through the measurement system;

[0018] S6. After turning off the heating system, turn off the frequency converter-controlled water pump and the main valve.

[0019] S7. Compare the data collected in step S5 with the corresponding liquid-solid coupling heat transfer simulation results to verify and calibrate the simulation results.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention reasonably simplifies the water-cooled flow channel of the thermal structure of a high-temperature wind tunnel. By building an experimental device and conducting a water flow test on the test piece, the actual cooling situation of the water-cooled system can be simulated and reproduced.

[0022] 2. This invention has a simple structure, is easy to operate, is small in size and compact in volume, saves space, and is reliable and safe;

[0023] 3. This invention can effectively verify the authenticity and accuracy of the numerical calculation of heat transfer in water-cooled structures, and provide reliable experimental data support for the coupled simulation of heat flow transfer and water cooling heat dissipation involved in the design of wind tunnel thermal structures;

[0024] 4. This invention can provide key calculation results for subsequent high-temperature structural stress analysis and safety assessment, effectively improving the efficiency of thermal structure design. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an experimental device used to verify the water-cooling performance of a high-temperature wind tunnel thermal structure. Figure 2 yes Figure 1 Schematic diagram of the pilot specimen; Figure 3 yes Figure 1 A partial sectional view of the pilot specimen from the front view; Figure 4 yes Figure 1 Left sectional view of the pilot specimen; Figure 5 This is a schematic diagram of an experimental procedure for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure. In the diagram, 1-cooling water tank, 2-variable frequency control water pump, 3-main valve, 4-tee, 5-inlet electromagnetic flowmeter, 6-test piece, 61-flow channel model, 62-top cover, 63-inlet, 64-outlet, 65-temperature sensor, 66-insulating asbestos mesh, 67-sealing ring, 68-cooling flow channel, 69-fastener, 7-outlet electromagnetic flowmeter, 8-branch valve, 9-quartz lamp heating device. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention. Specific implementation method one:

[0028] Combination Figure 1-4 This embodiment describes an experimental device for verifying the water cooling performance of a high-temperature wind tunnel thermal structure, comprising a cooling water tank 1, a frequency-controlled water pump 2, a main valve 3, a tee 4, an inlet electromagnetic flowmeter 5, a test piece 6, an outlet electromagnetic flowmeter 7, a branch valve 8, and a heating system.

[0029] The test piece 6 includes a flow channel model 61, a top cover 62, a water inlet 63, a water outlet 64, a temperature sensor 65, a heat-insulating asbestos mesh 66, a sealing ring 67, a cooling flow channel 68, and fasteners 69. The flow channel model 61 has a cooling flow channel 68 inside. The heat-insulating asbestos mesh 66 and the sealing ring 67 are provided between the flow channel model 61 and the top cover 62. The flow channel model 61 and the top cover 62 are fixed and sealed by fasteners 69. The top cover 62 has a water inlet 63 and a water outlet 64 that communicate with the cooling flow channel 68. The lower end face of the flow channel model 61 is the heating surface. Multiple temperature sensors 65 are arranged between the flow channel model 61 and the top cover 62 to measure the temperature of the heating surface of the flow channel model 61, the internal cooling water of the flow channel model 61, and the surface of the top cover 62. The heating system is located below the heating surface of the flow channel model 61.

[0030] The cooling water tank 1 is connected to the inlet 63 of the test piece 6 via a first main pipeline. The first main pipeline is provided with a frequency-controlled water pump 2, a main valve 3, a tee 4, and an inlet electromagnetic flow meter 5 in sequence from the incoming flow direction. The second branch of the tee 4 is connected to the cooling water tank 1 via a bypass pipeline. A branch valve 8 is provided on the bypass pipeline. The outlet 64 of the test piece 6 is connected to the cooling water tank 1 via a second main pipeline. An outlet electromagnetic flow meter 7 is provided on the second main pipeline.

[0031] Specifically, the first main pipeline, the second main pipeline, and the bypass pipeline are all high-temperature resistant stainless steel corrugated hoses.

[0032] Specifically, the temperature sensor 65 is glued to the flow channel model 61 and the top cover 62.

[0033] Specifically, the heating system is a quartz lamp heating device 9. Specific Implementation Method Two:

[0035] Combination Figure 1-5 This embodiment describes a test method for verifying the water-cooling performance of a high-temperature wind tunnel's thermal structure. The method steps are as follows:

[0036] S1. Sequentially open the main valve 3 and the variable frequency control water pump 2;

[0037] S2. Fine-tune branch valve 8 until the flow rate meets the test requirements;

[0038] S3. Confirm that the cooling water circulates stably in the loop formed by cooling water tank 1, the first main pipeline, the bypass pipeline, test piece 6, and the second main pipeline.

[0039] S4. Turn on the heating system to heat the test piece 6;

[0040] S5. Collect temperature and flow data of test piece 6 under different heating and cooling conditions through the measurement system;

[0041] S6. After shutting down the heating system, shut down the frequency converter-controlled water pump 2 and the main valve 3;

[0042] S7. Compare the data collected in step S5 with the corresponding liquid-solid coupling heat transfer simulation results to verify and calibrate the simulation results.

[0043] Specifically, in step S6, after the heating system is turned off and the temperature of the test piece 6 is allowed to cool naturally to room temperature, the water pump 2 and the main valve 3 are controlled by frequency conversion in sequence.

[0044] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An experimental device for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure, characterized in that: Includes cooling water tank (1), frequency converter controlled water pump (2), main valve (3), tee (4), inlet electromagnetic flow meter (5), test piece (6), outlet electromagnetic flow meter (7), branch valve (8), and heating system; The test piece (6) includes a flow channel model (61), a top cover (62), a water inlet (63), a water outlet (64), a temperature sensor (65), a heat-insulating asbestos mesh (66), a sealing ring (67), a cooling flow channel (68), and fasteners (69). The flow channel model (61) has a cooling flow channel (68) inside. The heat-insulating asbestos mesh (66) and the sealing ring (67) are provided between the flow channel model (61) and the top cover (62). The flow channel model (61) and the top cover (62) are fastened together. The component (69) achieves a fixed seal. The upper cover (62) is provided with an inlet (63) and an outlet (64) that communicate with the cooling channel (68). The lower end face of the channel model (61) is the heating surface. Multiple temperature sensors (65) are set between the channel model (61) and the upper cover (62) to measure the temperature of the heating surface of the channel model (61), the internal cooling water of the channel model (61), and the surface of the upper cover (62). The heating system is set below the heating surface of the channel model (61). The cooling water tank (1) is connected to the inlet (63) of the test piece (6) through the first main pipeline. The first main pipeline is provided with a frequency-controlled water pump (2), a main valve (3), a tee (4), and an inlet electromagnetic flow meter (5) in sequence from the incoming flow direction. The second branch of the tee (4) is connected to the cooling water tank (1) through a bypass pipeline. A branch valve (8) is provided on the bypass pipeline. The outlet (64) of the test piece (6) is connected to the cooling water tank (1) through the second main pipeline. An outlet electromagnetic flow meter (7) is provided on the second main pipeline.

2. The test equipment for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure according to claim 1, characterized in that: The first main pipeline, the second main pipeline, and the bypass pipeline are all made of high-temperature resistant stainless steel corrugated hoses.

3. The test equipment for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure according to claim 1, characterized in that: The temperature sensor (65) is glued to the flow channel model (61) and the top cover (62).

4. The test equipment for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure according to claim 1, characterized in that: The heating system is a quartz lamp heating device (9).

5. A test method for verifying the water-cooling performance of a high-temperature wind tunnel thermal structure, characterized in that: It relies on the experimental equipment for verifying the water-cooling performance of the thermal structure of a high-temperature wind tunnel as described in any one of claims 1-4, and the method steps are as follows: S1. Sequentially open the main valve (3) and the variable frequency control water pump (2). S2. Fine-tune the branch valve (8) until the flow rate meets the test requirements; S3. Confirm that the cooling water is in stable circulation in the loop formed by the cooling water tank (1), the first main pipeline, the bypass pipeline, the test piece (6), and the second main pipeline. S4. Turn on the heating system to heat the test piece (6); S5. Collect temperature and flow data of test specimen (6) under different heating and cooling conditions through the measurement system; S6. After shutting down the heating system, shut down the frequency converter water pump (2) and the main valve (3) in sequence. S7. Compare the data collected in step S5 with the corresponding liquid-solid coupling heat transfer simulation results to verify and calibrate the simulation results.

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