Integrated testing device for sweating, cooling, flowing and heat transfer characteristics of porous material

Abstract

The utility model relates to the technical field of sweating cooling test and measurement, and particularly discloses an integrated testing device for sweating cooling flow and heat transfer characteristics of a porous material. Comprising a bracket provided with a liquid storage cabin, an active and passive heat insulation piece which is arranged on the bracket and is provided with a hollow groove, a temperature testing assembly for measuring the temperature of the bottom of the porous material, and a pressure testing assembly for testing the pressure in the liquid storage cabin, the porous material is mounted in the hollow groove; and the active and passive heat insulation piece comprises a water cooling plate which is internally provided with a water flow channel and is provided with a hollow groove, and a heat insulation plate which is arranged on the water cooling plate. According to the utility model, active and passive thermal protection can be effectively realized, heat transfer between a heat source and the liquid storage cabin is effectively realized, and the temperature of a cooling working medium in the liquid storage cabin is prevented from being interfered before the cooling working medium enters a porous material; and the test precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of sweating cooling test and measurement, and more particularly to an integrated testing device for sweating cooling flow and heat transfer characteristics of porous materials. Background Art

[0002] The history of aircraft development is only a little over a hundred years, but it has continuously pushed human civilization to new heights. With the further development of hypersonic aircraft, flight speeds and durations will be further increased, and aerodynamic thermal problems will become more serious, requiring aircraft to operate stably for long periods of time in high-enthalpy environments. Therefore, advanced thermal protection technology is a research direction that urgently needs breakthroughs. Thermal protection technology can be divided into three types: passive, semi-passive, and active. Among them, active thermal protection mainly relies on cooling fluids to remove and isolate heat to protect the structure. Compared with passive / semi-passive thermal protection, active thermal protection has the characteristics of strong cooling capacity, ability to withstand long-term heating of high-density heat flux, closed-loop temperature control, and reusability. Active thermal protection solutions mainly include convection cooling, film cooling, and sweat cooling.

[0003] The principles of transpiration cooling are similar to those of film cooling. The difference lies in the form of the coolant channel. Transpiration cooling enters the mainstream through a porous structure, forming a continuous membrane protective wall to block or delay the entry of heat flow. At the same time, the coolant heat sink can also absorb a large amount of heat and take it away.

[0004] However, the thermal protection of the test device in the prior art cannot effectively isolate heat transfer, so that the temperature of the cooling medium is disturbed before entering the porous material, thereby affecting the measurement accuracy. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide an integrated testing device for the sweating, cooling, flow and heat transfer characteristics of porous materials, which can effectively realize active and passive thermal protection, effectively transfer heat between the heat source and the liquid storage tank, and avoid the temperature of the cooling medium in the liquid storage tank from being disturbed before entering the porous material; thus making the test accuracy higher.

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A device for integrating testing the sweating, cooling, flow and heat transfer characteristics of porous materials, comprising a bracket provided with a liquid storage tank, an active and passive thermal insulation member installed on the bracket and having a hollow groove, a temperature testing assembly for measuring the temperature at the bottom of the porous material, and a pressure testing assembly for testing the pressure in the liquid storage tank; the porous material is installed in the hollow groove; the active and passive thermal insulation member comprises a water-cooled plate with a water flow channel provided therein and having a hollow groove, and a thermal insulation plate installed on the water-cooled plate; the water-cooled plate is installed on the bracket.

[0008] In some possible implementations, a through cavity adapted to the hollow groove is provided on the heat insulation plate.

[0009] In some possible implementations, in order to effectively stabilize the flow of cooling medium in the liquid storage tank and avoid the problem of phase interface fluctuation caused by phase change; a flow equalizing plate arranged parallel to the water cooling plate is provided in the liquid storage tank; the flow equalizing plate separates the liquid storage tank into an upper chamber and a lower chamber.

[0010] In some possible implementations, a plurality of groups of channels connecting the upper cavity and the lower cavity are provided on the flow equalizing plate.

[0011] In some possible embodiments, in order to effectively test the temperature distribution at the bottom of the porous material, the temperature testing assembly includes multiple groups of thermocouples installed at the bottom of the liquid storage tank, and the probes of the multiple groups of thermocouples respectively pass through the liquid storage tank and are located at the bottom of the porous material.

[0012] In some possible implementations, in order to make the thermocouple have high temperature resistance and waterproof properties, the thermocouple is a K-type armored thermocouple.

[0013] In some possible implementations, in order to effectively achieve the regulation of the cooling medium and to be able to perform real-time testing of the pressure in the liquid storage tank; a pipeline is provided at the bottom of the liquid storage tank, which is connected to the liquid storage tank and is used to transport the cooling medium in the liquid storage tank; and the pressure testing component is provided on the pipeline.

[0014] In some possible implementations, in order to effectively achieve real-time measurement of the liquid level information of the cooling medium in the liquid storage tank, a liquid level testing component is further provided in the liquid storage tank.

[0015] In some possible embodiments, in order to ensure that the porous material has good sealing performance with the insulation board and the bracket after being installed on the active and passive insulation parts; the bracket includes a support plate provided with a chamber and used to support and fix the active and passive insulation parts, and a support leg for supporting the support plate; the liquid storage tank is integrally formed with the support plate and has a liquid storage chamber connected to the chamber; the flow equalizing plate is installed in the liquid storage chamber; and an annular groove is formed between the support plate and the insulation plate.

[0016] In some possible implementations, a plurality of groups of positioning blocks integrally formed with the water cooling plate are provided on the water cooling plate, the positioning blocks are located in the annular groove, and a groove is formed between two adjacent groups of positioning blocks.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model effectively realizes active thermal protection by setting the water cooling plate, and effectively realizes passive protection by setting the heat insulation plate, thereby effectively avoiding heat transfer between the heat source and the liquid storage tank during the test process, and avoiding the temperature of the cooling medium being disturbed before entering the porous material, which affects the test accuracy;

[0019] The utility model effectively realizes real-time testing of the liquid level information of the cooling medium and the pressure in the liquid storage tank by setting the liquid level test component and the pressure test component. Combined with the measurement data, the phase change process is more accurately controlled, and the control accuracy of the test process and the comprehensiveness of the temperature measurement are improved.

[0020] The utility model realizes non-invasive measurement through the liquid level test component, the pressure test component and the temperature test component, and the fixed structure for the porous material formed by the combination can perform tests without destroying the sealing performance, thereby further improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a top view of the present utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of the water cooling plate in the utility model;

[0026] Figure 6 This is a diagram of the use state of the utility model;

[0027] Among them: 1. Bracket; 10. Liquid storage tank; 101. Flow equalizing plate; 102. Liquid storage chamber; 11. Support plate; 12. Support leg; 2. Active and passive thermal insulation components; 20. Hollow groove; 21. Water cooling plate; 211. Positioning block; 22. Thermal insulation plate; 23. Annular groove; 3. Temperature test assembly; 4. Liquid level test assembly; 41. Thermocouple; 5. Pressure test assembly; 100. Porous material. DETAILED DESCRIPTION

[0028] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediary; they can refer to internal communication between two components or interactions between two components. The terms "first," "second," and similar terms mentioned in this application do not denote any order, quantity, or importance; they are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation; rather, they indicate the presence of at least one. In the implementation of this application, "and / or" describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more. For example, "plurality" refers to two or more positioning posts. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0029] The utility model is described in detail below.

[0030] The porous material 100 in the present invention is made of alumina ceramics based on additive manufacturing technology;

[0031] like Figures 1-6 As shown, a testing device for sweating cooling of a porous material 100 includes a bracket 1 provided with a liquid storage tank 10, an active and passive thermal insulation member 2 installed on the bracket 1 and having a hollow groove 20, a temperature testing component 3 for measuring the temperature of the bottom of the porous material 100, a liquid level testing component 4 for testing the liquid level information of the cooling medium in the liquid storage tank 10, and a pressure testing component 5 for testing the pressure in the liquid storage tank 10; the porous material 100 is installed in the hollow groove 20; the active and passive thermal insulation member 2 includes a water-cooled plate 21 with a water flow channel provided therein and having a hollow groove 20, and a thermal insulation plate 22 installed on the water-cooled plate 21; the water-cooled plate 21 is installed on the bracket 1; the liquid storage tank 10 is located directly below the porous material 100, and the cooling medium therein will cool the porous material 100 during the test.

[0032] like Figure 6 As shown, during the test, the porous material 100 is installed in the hollow groove 20, and the temperature fluctuation of the cooling water in the water-cooling plate 21 is within 3°C under constant working conditions. The temperature difference between the cooling water and the cooling medium in the liquid storage tank 10 is within 10°C under the maximum heat flow of the heating system. In addition, the thermal insulation function of the thermal insulation plate 22 is combined to achieve active and passive thermal protection.

[0033] The temperature test component 3, the liquid level test component 4, and the pressure test component 5 are sensors in the prior art, and their internal structures are not described in detail here;

[0034] Specifically, a water inlet and a water outlet connected to the water flow channel are provided on the water cooling plate 21, the water inlet is connected to the water inlet pipe, and the water outlet is connected to the water outlet pipe, thereby realizing active heat insulation;

[0035] During the test, the porous material 100 is heated by the heating system, and the coolant in the liquid storage tank 10 actively cools the porous material 100. The liquid level information of the cooling medium during the test is monitored in real time by the liquid level test component 4. The pressure in the liquid storage tank 10 is monitored in real time by the pressure test. The temperature test component 3 monitors the temperature distribution at the bottom of the porous material 100 during the heating process. During the test, the phase change process is controlled by combining the pressure data and the liquid level data, thereby improving the control accuracy of the test process and the comprehensiveness of the temperature measurement. The heating system described here is a prior art, and can be, for example, a heating system that can generate a radiant heat source.

[0036] Specifically, a through cavity adapted to the hollow groove 20 is provided on the heat insulation board 22 , so that the heat generated by the heating system passes through the through cavity and acts directly on the porous material 100 .

[0037] In some possible implementations, such as Figure 3 、 Figure 4 As shown, in order to effectively stabilize the flow of cooling medium in the liquid storage tank and avoid the phase interface fluctuation problem caused by phase change; a flow equalizing plate 101 arranged parallel to the water-cooled plate 21 is provided in the liquid storage tank 10; the flow equalizing plate 101 separates the liquid storage tank 10 into an upper cavity and a lower cavity; a plurality of groups of channels connecting the upper cavity and the lower cavity are provided on the flow equalizing plate 101, and the plurality of groups of channels are evenly arranged on the flow equalizing plate 101; a pipe connected to the inside of the liquid storage tank 10 is provided at the bottom of the liquid storage tank 10, and the pipe is used to realize the transportation of cooling medium; by arranging the pressure testing component 5 on the pipe, the pressure in the liquid storage tank 10 is monitored, and the liquid level testing component 4 is arranged in the upper cavity.

[0038] In some possible implementations, such as Figure 2 、 Figure 3 、 Figure 4 As shown, in order to effectively implement the test of the temperature distribution at the bottom of the porous material 100, the temperature testing assembly 3 includes multiple groups of thermocouples 41 installed at the bottom of the liquid storage tank 10. The probes of the multiple groups of thermocouples 41 respectively pass through the liquid storage tank 10 and are located at the bottom of the porous material 100;

[0039] Specifically, in order to make the thermocouple 41 have high temperature resistance and waterproof performance; the thermocouple 41 is a K-type armored thermocouple in the prior art, and its arrangement requirements can be set according to the test requirements of the porous material, which will not be detailed here;

[0040] like Figure 3 As shown, the thermocouple 41 is installed at the bottom of the liquid storage chamber 10, and the probe will pass through the lower cavity and be located in the upper cavity, and the distance between the end of the probe and the bottom of the porous material 100 is 1-2 mm;

[0041] Furthermore, a fixing point is provided at the bottom of the porous material 100 to fix the probe, thereby avoiding the problem of being unable to fix the probe due to high test temperature.

[0042] In some possible implementations, such as Figure 1 As shown, in order to ensure that the porous material 100 has good sealing performance with the insulation board 22 and the bracket 1 after being installed on the active and passive insulation component 2; the bracket 1 includes a support plate 11 provided with a chamber and used to support and fix the active and passive insulation component 2, and a support leg 12 used to support the support plate 11 and located at the bottom of the support plate 11; the liquid storage tank 10 is integrally formed with the support plate 11 and has a liquid storage chamber 102 connected to the chamber; the flow equalizing plate 101 is installed in the liquid storage chamber 102; and an annular groove 23 is formed between the support plate 11 and the insulation board 22.

[0043] The support plate 11 is provided with a chamber, which is coaxially arranged and connected with the hollow groove 20 on the water-cooling plate 21, the through cavity on the heat insulation plate 22, and the liquid storage chamber 102. The cooling medium in the liquid storage chamber 102 cools the porous material 100 from the bottom when it is heated;

[0044] like Figure 3 As shown, the water-cooling plate 21 is installed on the support plate 11 and connected and fixed to each other, and the heat insulation plate 22 is installed on the water-cooling plate 21; the heat insulation plate 22, the water-cooling plate 21, and the side of the support plate 11 close to the porous material 100 form an annular groove 23, and the top of the porous material 100 and the portion located in the annular groove 23 will be limited and fixed by the heat insulation plate 22; the bottom of the porous material 100 and the portion located in the annular groove 23 will be supported and fixed by the support plate 11, thereby closing the gap formed by the porous material 100 and the hollow groove 20, thereby achieving sealing and fixing of the porous material 100;

[0045] In the present invention, the pressure testing assembly 5 is installed on a pipe connected to the interior of the liquid storage tank 10 to realize pressure monitoring, the liquid level testing assembly 4 will be located in the liquid storage cavity, and the thermocouple 41 will be installed on the liquid storage tank 10; during the test process, non-invasive measurement will be achieved, thereby effectively realizing measurement without destroying the sealing, greatly improving the test accuracy.

[0046] In some possible implementations, such as Figure 3 、 Figure 4 、 Figure 5 As shown, a plurality of groups of positioning blocks 211 are provided on the water-cooling plate 21, which are integrally formed with the water-cooling plate 21 to form a hollow groove 20. The positioning blocks 211 are located in the annular groove 23 and a groove is formed between two adjacent groups of positioning blocks 211. The groove has a U-shaped structure, and its opening is provided on the side close to the porous material 100.

[0047] The positioning blocks 211 are integrally formed with the water-cooling plate 21, and grooves are formed between two adjacent groups of positioning blocks 211. On the one hand, this can increase the contact area between the water-cooling plate 21 and the porous material 100, thereby making the insulation area larger; on the other hand, it can also effectively fix the porous material 100.

[0048] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An integrated testing device for the sweating, cooling, flow and heat transfer characteristics of porous materials, characterized in that: It includes a bracket with a liquid storage tank, an active and passive thermal insulation component installed on the bracket and having a hollow groove, a temperature testing component for measuring the temperature of the bottom of the porous material, and a pressure testing component for testing the pressure in the liquid storage tank; the porous material is installed in the hollow groove; the active and passive thermal insulation component includes a water-cooled plate with a water flow channel and a hollow groove inside, and a thermal insulation plate installed on the water-cooled plate; the water-cooled plate is installed on the bracket.

2. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 1, characterized in that: A through cavity adapted to the hollow groove is provided on the heat insulation plate.

3. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 1, characterized in that: A flow balancing plate arranged parallel to the water cooling plate is arranged in the liquid storage tank; the flow balancing plate separates the liquid storage tank into an upper chamber and a lower chamber.

4. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 3, characterized in that: A plurality of channels connecting the upper cavity and the lower cavity are arranged on the flow equalizing plate.

5. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 3, characterized in that: The temperature testing assembly includes multiple groups of thermocouples installed at the bottom of the liquid storage tank, and the probes of the multiple groups of thermocouples pass through the liquid storage tank and are located at the bottom of the porous material.

6. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 5, characterized in that: The thermocouple is a K-type armored thermocouple.

7. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 1, characterized in that: A pipeline communicating with the liquid storage tank and used for transporting the cooling medium in the liquid storage tank is provided at the bottom of the liquid storage tank; the pressure testing assembly is provided on the pipeline.

8. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 1, characterized in that: A liquid level testing component is also provided in the liquid storage tank.

9. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 3, characterized in that: The bracket includes a support plate provided with a chamber and used to support and fix the active and passive thermal insulation components, and a support leg used to support the support plate; the liquid storage tank is integrally formed with the support plate and has a liquid storage chamber connected to the chamber; the flow equalizing plate is installed in the liquid storage chamber; and an annular groove is formed between the support plate and the thermal insulation plate.

10. The integrated testing device for sweating, cooling, flow and heat transfer characteristics of porous materials according to claim 9, characterized in that: A plurality of positioning blocks integrally formed with the water cooling plate are provided on the water cooling plate. The positioning blocks are located in the annular groove and a groove is formed between two adjacent groups of positioning blocks.

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