Adjustable sweating cooling effect testing system and testing method thereof

Abstract

The invention discloses an adjustable sweating cooling effect testing system and a testing method thereof. An adjustable sweating cooling effect testing system comprises a liquid supply mechanism, the liquid supply mechanism comprises a micro-injection pump, a three-way connector and a liquid supply pipeline, and an outlet of the micro-injection pump is in butt joint with the liquid supply pipeline and a pressure sensor through the three-way connector; the first experiment jig is suitable for a sheet-shaped test piece; the second experiment jig is suitable for a block-shaped test piece; the infrared heating lamp is used for providing heat for the test piece, a light uniformizing sheet is arranged between the infrared heating lamp and the first test fixture, and a plano-convex lens is arranged between the infrared heating lamp and the second test fixture; the infrared thermal imager is used for collecting the surface temperature of the test piece; and the thermocouple assembly is used for collecting the internal temperature of the test piece. Different experimental jigs are selected for experiments according to different sizes, and the sweating cooling test requirements of different products are met.

Description

Technical Field

[0001] The invention relates to the technical field of material testing, and in particular to a sweating cooling testing device and method. Background Art

[0002] Transpiration cooling is a relatively efficient cooling method. When the liquid cooling medium flows in the micro-porous channel, it absorbs heat and undergoes a phase change. This process significantly improves the cooling efficiency. Therefore, the development of an efficient transpiration cooling method will help improve the thermal management performance of hypersonic vehicles, thereby ensuring their safety and reliability under extreme flight conditions. However, there are still some problems with transpiration cooling, mainly due to insufficient structural strength and difficulty in integration. At present, there is a lack of research on channel-porous medium integration and the combination of additive manufacturing and transpiration cooling.

[0003] At present, the test system for sweating cooling is mainly a measuring device for fixed size and shape devices. The Chinese patent with publication number CN115901846A discloses a sweating cooling test device and method. The patent makes the use scenario of the tested porous medium plate more in line with the environment used in the engine. The same porous medium plate is partially sweated and cooled by the cooling medium. It can also perform simultaneous experiments of sweating cooling with different cooling media and non-sweating cooling, providing effective support for theoretical research on the application of different sweating cooling methods in the engine field. However, the device needs to be designed separately for different sweating sizes and has a smaller range of applicability. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an adjustable sweating cooling effect testing system and a testing method thereof, which have solved at least one of the above-mentioned technical problems.

[0005] The technical solution of the present invention is: an adjustable sweating cooling effect test system, characterized in that it comprises a liquid supply mechanism, the liquid supply mechanism comprises a micro-injection pump, a three-way joint and a liquid supply pipeline, the outlet of the micro-injection pump is connected to the liquid supply pipeline and the pressure sensor respectively through the three-way joint;

[0006] Also included is a first experimental fixture applicable to sheet-shaped test pieces and a second experimental fixture applicable to block-shaped test pieces;

[0007] The first experimental fixture comprises a first base, a liquid supply vertical pipe and a supporting member, the bottom of the first base is detachably connected to the liquid supply pipeline, the bottom of the liquid supply vertical pipe is plugged into the first base and connected to the liquid supply pipeline, the top of the liquid supply vertical pipe is plugged into the supporting member, the supporting member comprises a sheet-like test piece, a gasket and a heat insulation sheet that are glued together from top to bottom, and the top of the liquid supply vertical pipe is connected to the bottom of the sheet-like test piece;

[0008] The second experimental fixture comprises a second base, a heat-insulating cover and a reflective film, the second base is provided with a mounting groove for embedding the block test piece, the mounting groove and the block test piece are sealed by a sealant, and the bottom of the base is provided with a docking hole for docking the liquid supply pipeline and the bottom of the block test piece;

[0009] The heat-insulating cover is sleeved on the periphery of the second base, the heat-insulating cover is provided with an exposure opening for exposing the upper surface of the block test piece, and the rest of the heat-insulating cover except the exposure opening is covered with the reflective film;

[0010] It also includes an infrared heating lamp for providing heat to the test piece, a light homogenizer is installed between the infrared heating lamp and the first experimental fixture, and a plano-convex lens is installed between the infrared heating lamp and the second experimental fixture;

[0011] It also includes an infrared thermal imager for collecting the surface temperature of the test piece and a thermocouple assembly for collecting the internal temperature of the test piece. The thermocouple assembly includes a first thermocouple for sensing the temperature at different radial positions on the bottom of the sheet test piece and a second thermocouple for sensing the longitudinal temperature at different thickness positions of the block test piece.

[0012] The present invention provides different experimental fixtures of different sizes for conducting experiments to meet the requirements of sweat cooling tests for different products. For sheet test pieces (larger test pieces), a homogenizer is mainly used to make the heat flow uniform and maintain a larger heating area; for block test pieces (smaller test pieces), a plano-convex lens is mainly used for focusing.

[0013] Further preferably, the gasket is provided with a through hole for passing a first thermocouple, and the first thermocouple is used to abut against the bottom of the sheet-like test piece.

[0014] Further preferably, the gasket is provided with four circumferentially arranged perforation groups, and each perforation group is provided with the perforations extending radially outward from a side adjacent to the docking hole to a side away from the docking hole.

[0015] It is convenient to select the average value of two test points at the same radial position to correspond to the temperature value at the current radial position.

[0016] Further preferably, the side wall of the block-shaped test piece is provided with a through hole arranged longitudinally for passing the second thermocouple, and the second thermocouple is used to abut against the side wall of the block-shaped test piece.

[0017] It is convenient to select the average value of two test points at the same thickness position to align the temperature value at the current thickness position.

[0018] Further preferably, it further comprises an integrated frame, on which the infrared thermal imager, the infrared heating lamp, the microinjection pump, the three-way connector and the pressure sensor are installed;

[0019] The first experimental jig and the second experimental jig can be detachably switched under the infrared heating lamp.

[0020] Further preferably, the first experimental fixture comprises a first lifting platform, the first base is installed on the first lifting platform, a first telescopic frame is installed on the first lifting platform, and the first telescopic frame is detachably connected to the light homogenizing sheet;

[0021] The second experimental fixture comprises a second lifting platform, the second base is installed on the second lifting platform, a second telescopic frame is installed on the second lifting platform, and the second telescopic frame is detachably connected to the plano-convex lens.

[0022] Further preferably, the diameter of the plano-convex lens is 50 mm, the upper side of the plano-convex lens is a plane, the lower side of the plano-convex lens is a convex surface, and the thickness of the plano-convex lens at the maximum thickness is 19.2 mm;

[0023] The diameter of the light homogenizer is 50 mm, and the light homogenizer is double-sided frosted glass with a roughness of 1500 mesh and a thickness of 2 mm.

[0024] Further preferably, the three-way joint is connected to the liquid supply pipeline via a pagoda head and sealed with raw tape; the three-way joint is connected to the pressure sensor via threads and sealed with raw tape; the first base and the second base are both connected to the liquid supply pipeline via M6 threads, and the interface is sealed with raw tape.

[0025] A testing method for an adjustable sweating cooling effect testing system, characterized in that it comprises the following steps:

[0026] Step 1: Determine and select the first experimental fixture or the second experimental fixture according to the size type of the test piece to fix and assemble the test piece;

[0027] Step 2, turning on the infrared heating lamp to heat the area where the test piece is located;

[0028] Step 3: When the temperature change difference detected by the thermocouple assembly and the infrared thermal imager is less than 1°C, the micro-injection pump is turned on to inject water, and the infrared thermal imager is used to collect the surface temperature and perform real-time surface temperature data monitoring; the thermocouple assembly is used to monitor the internal temperature data of the test piece; and the pressure sensor is used to monitor the pressure at the entrance of the test piece in real time;

[0029] The computer stores the data collected by the pressure sensor, the infrared thermal imager and the thermocouple assembly.

[0030] The evaluation index is mainly the temperature during quantitative liquid supply. The lower the temperature, the better the sweating cooling effect.

[0031] Further preferably, in step 3, the acquisition frequency of the infrared thermal imager is 50 Hz, that is, the temperature data can be collected 50 times per second;

[0032] Twenty-two first thermocouples are connected to the first experimental fixture, and two of the twenty-two first thermocouples form a group for detecting the temperature value at the same radial position, and the average value of the two temperature values ​​at the same radial position is the temperature value at the current radial position;

[0033] Eight second thermocouples are connected to the second experimental fixture. Two of the eight second thermocouples form a group and are used to detect the temperature value at the same thickness position. The average of the two temperature values ​​at the same thickness position is the temperature value at the current thickness position.

[0034] The output signal of the pressure sensor is 0-10V, and data is collected every 1s.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention can perform heating tests on sweat cooling test pieces of various shapes and sizes, can collect data such as temperature reflecting the cooling effect and pressure reflecting the flow effect in real time, and can compare and analyze the sweat cooling performance effects of different test pieces.

[0037] The present invention adopts a detection method combining surface infrared detection with thermocouple detection, which can systematically reflect the effect of sweating cooling. In the example test pieces, both the sheet test pieces (larger thin pieces) and the block test pieces (smaller thin pieces) can be temperature monitored horizontally, realizing all-round data monitoring and avoiding large errors caused by a single variable. At the same time, the surface phase change during sweating can be intuitively monitored.

[0038] The present invention adopts the method of adjusting the plano-convex lens and the light homogenizer to realize the sweating test of experimental sweating pieces of large and small ranges. For sheet test pieces (larger test pieces), the light homogenizer is mainly used to make the heat flow uniform and maintain a larger heating area; for block test pieces (smaller test pieces), the plano-convex lens is mainly used for focusing. At the same time, the power supply can be used to adjust the overall power. In this way, the heat flux density can be changed under a fixed heating range.

[0039] The present invention significantly reduces the experimental and production costs. By combining infrared lamp heating with surface infrared detection and thermocouple detection, the reliance on high-cost equipment such as wind tunnels is reduced, making the overall system more economical and practical. At the same time, the ability of real-time monitoring and data analysis reduces the waste of materials caused by errors during the test process, further improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a specific embodiment 1 of the present invention;

[0041] Figure 2 This is a structural schematic diagram of a first experimental fixture of specific embodiment 1 of the present invention;

[0042] Figure 3 It is a schematic diagram of the partial structure of the first experimental fixture of the specific embodiment 1 of the present invention;

[0043] Figure 4 It is a schematic diagram of the partial structure of the first experimental fixture of the specific embodiment 1 of the present invention;

[0044] Figure 5 A structural schematic diagram of a first base of a first experimental fixture according to a specific embodiment 1 of the present invention;

[0045] Figure 6 It is a structural schematic diagram of the first base of the first experimental fixture in the specific embodiment 1 of the present invention from another perspective;

[0046] Figure 7 This is a structural schematic diagram of the second experimental fixture of the specific embodiment 1 of the present invention;

[0047] Figure 8 It is a structural schematic diagram of the second experimental fixture of the specific embodiment 1 of the present invention from another perspective;

[0048] Fig. 9 It is an exploded view of the second experimental fixture of the specific embodiment 1 of the present invention;

[0049] Fig.10 It is an exploded view of the second experimental fixture of the specific embodiment 1 of the present invention;

[0050] Fig.11 This is a structural schematic diagram of the second base and the block-shaped test piece of the second experimental fixture in specific embodiment 1 of the present invention.

[0051] In the figure, 1: computer; 3: data acquisition instrument; 4: power supply; 5: plano-convex lens; 6: infrared heating lamp; 7: first experimental fixture; 8: second experimental fixture; 9: light homogenizer; 10: liquid supply pipeline; 12: pressure sensor; 13: three-way connector; 15: micro-injection pump; 18: infrared thermal imager; 19: optical fiber.

[0052] 71: block test piece; 73: reflective film; 74: thermal insulation cover; 75: block test piece; 76: second base;

[0053] 81: first base; 82: sheet test piece; 83: gasket; 83: liquid supply vertical pipe; 85: heat insulation sheet. DETAILED DESCRIPTION

[0054] See also Figures 1 to 11 , Specific embodiment 1, an adjustable sweating cooling effect test system, including a liquid supply mechanism, a pressure sensor 12, a first experimental fixture 7 suitable for a sheet test piece and a second experimental fixture 8 suitable for a block test piece, an infrared heating lamp 6 for providing heat to the test piece, a thermocouple assembly for collecting the internal temperature of the test piece, and an infrared thermal imager for collecting the surface temperature of the test piece. The thermocouple assembly includes a first thermocouple for sensing the temperature at different radial positions at the bottom of the sheet test piece 82 and a second thermocouple for sensing the longitudinal temperature at different thickness positions of the block test piece.

[0055] The block test piece 71 and the sheet test piece 82 are both made of porous media.

[0056] The thickness of the sheet heater is less than the thickness of the block test piece. The thickness of the sheet test piece is less than 5 mm. The thickness of the sheet test piece is less than the radial length of the sheet test piece. The thickness of the block test piece is not less than the radial length of the block test piece. The sheet test piece 82 can be a larger test piece with a heating requirement of 30 mm in diameter. The block test piece 71 can be a 10 mm×10 mm×10 mm focused heating piece.

[0057] The liquid supply mechanism includes a microinjection pump 15, a three-way connector 13 and a liquid supply pipeline. The outlet of the microinjection pump 15 is connected to the liquid supply pipeline and the pressure sensor 12 through the three-way connector 13. The microinjection pump 15 is connected to the three-way connector 13 through a pipeline. The inner diameter of the pipeline and the liquid supply pipeline 10 is 4mm and the outer diameter is 6mm. It can realize timed and quantitative liquid supply, and is equipped with a screen for parameter setting. It is operated by a screw rod and a stepper motor to achieve adjustment from low flow to high flow. Each outlet of the three-way connector 13 is M20, which is connected to the liquid supply pipeline 10 through a pagoda head. The pressure sensor 12 is directly connected to the three-way connector 13. The connection method is a threaded connection, which can ensure the sealing effect of water.

[0058] The first experimental fixture 7 includes a first base 81, a liquid supply vertical pipe 84 and a supporting member. The bottom of the first base 81 is detachably connected to the liquid supply pipeline. The bottom of the liquid supply vertical pipe 84 is plugged into the first base 81 and connected to the liquid supply pipeline. The top of the liquid supply vertical pipe 84 is plugged into the supporting member. The supporting member includes a sheet test piece, a gasket 83 and a heat insulation sheet 85 that are glued together from top to bottom. The top of the liquid supply vertical pipe 84 is connected to the bottom of the sheet test piece 82. The gasket 83 is provided with a perforation for passing the first thermocouple, and the first thermocouple is used to resist the bottom of the sheet test piece 82. The gasket 83 is provided with four circumferentially arranged perforation groups, each of which is provided with a perforation extending radially outward from the side adjacent to the docking hole to the side away from the docking hole. It is convenient to select the average value of two test points at the same radial position to align the temperature value at the current radial position. In the same radial direction, the spacing between adjacent first thermocouples is equal. The interval is 1mm-3mm. The material of the heat insulating sheet 85 is vacuum silicon heat insulating cotton. The first base 81 is a ceramic base. The first base 81 is provided with an opening for the first thermocouple lead to extend out and pass through longitudinally. The gasket can be a ceramic gasket. Preferably, it is a gasket with a relatively small thermal conductivity. It plays a role in preventing heat loss. The lower side and the outer circumference of the sheet test piece are sealed by sealant, and the sealant is used to ensure the sealing of the joint between the liquid supply vertical pipe and the bottom of the sheet test piece. The sealant does not seal the top surface of the test piece.

[0059] The second experimental fixture 8 includes a second base 76, a heat preservation cover 74 and a reflective film 72. The second base 76 is provided with an installation groove for embedding the block test piece. The installation groove and the block test piece are sealed by a sealant. The bottom of the base is provided with a docking hole for docking the liquid supply pipeline and the bottom of the block test piece. The heat preservation cover 74 is sleeved on the periphery of the second base 76. The heat preservation cover 74 is provided with an exposed opening for exposing the upper surface of the block test piece. The remaining area of ​​the heat preservation cover 74 except the exposed opening is covered with a reflective film 72. The side wall of the block test piece is provided with a longitudinally arranged through hole for passing the second thermocouple, and the second thermocouple is used to resist the side wall of the block test piece 71. It is convenient to select the average value of two test points at the same thickness position to correspond to the temperature value at the current thickness position. The adjacent second thermocouples on the same side of the block test piece are arranged longitudinally at equal intervals. The interval is 1mm-3mm. The reflective film 72 is a tin foil reflective film 72. The reflective film 72 can effectively prevent the infrared heating lamp 6 from applying heat to the non-sweating area, and the heat-insulating cover 74 is its heat-insulating layer, which can prevent heat loss. The heat-insulating cover 74 is a ceramic heat-insulating cover. The second base 76 is a ceramic base. According to the shape of the block test piece, the second base with different mounting grooves is selected. The connection between the block test piece and the groove edge of the mounting groove is sealed by a sealant. The side wall of the block test piece located outside the mounting groove is also covered with a sealant. The sealant does not block the top surface of the test piece.

[0060] The infrared heating lamp 6 is connected to the power supply 4. The rated voltage and current of the lamp is 24V, 10A, the maximum power is 250W, and the lamp mouth size is 50mm in diameter. Multiple lamps can be used together to produce a superposition effect of heat flow, or they can be used individually to supply heat flow. The heat flow application method is mainly electrothermal conversion, which converts electrical energy into infrared rays and applies them to the surface of the sweating piece for heat flow supply. The power supply 4 (the supply range of the power supply 4 is 0-24V, 0-10A) is connected to the infrared heating lamp 6 and the pressure sensor 12 to provide them with electrical energy supply. The supply method for the infrared heating lamp 67 is adjustable, and the supply method for the pressure sensor 12 is constant pressure supply. When multiple heating lamps are used in a superimposed manner, multiple power supplies 4 can be used in combination.

[0061] A light homogenizer 9 is installed between the infrared heating lamp 6 and the first experimental fixture 7. The diameter of the light homogenizer 9 is 50 mm, and the light homogenizer 9 is double-sided frosted glass with a roughness of 1500 mesh and a thickness of 2 mm.

[0062] A plano-convex lens 5 is installed between the infrared heating lamp 6 and the second experimental fixture 8. The diameter of the plano-convex lens 5 is 50 mm, the upper side of the plano-convex lens 5 is a plane, the lower side of the plano-convex lens 5 is a convex surface, and the thickness of the plano-convex lens 5 at the maximum thickness is 19.2 mm.

[0063] The infrared thermal imager 18 is connected to the computer 1 via an optical fiber 19. The infrared thermal imager collects data in the direction of the upper surface of the test piece. The infrared thermal imager 18 has two temperature measurement ranges, 0-300°C and 300-1000°C. It collects and stores the surface temperature of the test piece in real time. At the same time, it can track the temperature within a fixed range or at a fixed point to track the temperature changes during the sweating process. The surface temperature is generally the highest temperature during sweating cooling. Therefore, the temperature data collected by the infrared thermal imager 18 is the most important indicator of the sweating cooling measurement standard. When collecting data, the infrared thermal imager 18 can record the temperature performance of the sweating piece surface in real time.

[0064] The present invention provides different experimental fixtures of different sizes for conducting experiments to meet the requirements of sweat cooling tests for different products. For the sheet test piece 82 (larger test piece), the light homogenizer 9 is mainly used to make the heat flow uniform and maintain a larger heating area; for the block test piece 71 (smaller test piece), the plano-convex lens 5 is mainly used for focusing.

[0065] It also includes an integrated frame, on which an infrared thermal imager, an infrared heating lamp 6, a microinjection pump 15, a three-way connector 13 and a pressure sensor 12 are installed; the first experimental fixture 7 and the second experimental fixture 8 can be detachably switched under the infrared heating lamp 6.

[0066] The pressure sensor 12 and the thermocouple assembly are connected to the data acquisition device 3, and the data acquisition device 3 is connected to the computer 1 through the optical fiber 19. The infrared thermal imager is connected to the computer 1 through the optical fiber 19.

[0067] The first experimental fixture 7 comprises a first lifting platform, on which a first base 81 is installed, and on which a first telescopic frame is installed, and the first telescopic frame is detachably connected to the light homogenizing sheet 9 .

[0068] The second experimental fixture 8 includes a second lifting platform, on which a second base 76 is installed, and on which a second telescopic frame is installed, and the second telescopic frame is detachably connected to the plano-convex lens 5 .

[0069] The three-way joint 13 is connected to the liquid supply pipeline 10 through a pagoda head and sealed with raw tape; the three-way joint 13 is connected to the pressure sensor 12 through threads and sealed with raw tape; the first base 81 and the second base 76 are both connected to the liquid supply pipeline 10 through M6 threads, and the interfaces are sealed with raw tape.

[0070] A testing method for an adjustable sweating cooling effect testing system, characterized in that it comprises the following steps:

[0071] Step 1: Determine and select the first experimental fixture 7 or the second experimental fixture 8 according to the size type of the test piece to fix and assemble the test piece;

[0072] Step 2, turning on the infrared heating lamp 6, the infrared heating lamp 6 heats the area where the test piece is located;

[0073] Step three, when the temperature change difference detected by the thermocouple assembly and the infrared thermal imager is less than 1°C, the micro-injection pump 15 is turned on to inject water, and the infrared thermal imager 18 is used to collect the surface temperature and perform real-time surface temperature data monitoring; the thermocouple assembly is used to monitor the internal temperature data of the test piece; the pressure sensor 12 is used to monitor the pressure at the entrance of the test piece in real time; the computer 1 stores the data collected by the pressure sensor 12, the infrared thermal imager and the thermocouple assembly.

[0074] The evaluation index is mainly the temperature during quantitative liquid supply. The lower the temperature, the better the sweating cooling effect.

[0075] In step three, the acquisition frequency of the infrared thermal imager 18 is 50 Hz, that is, the temperature data can be collected 50 times per second.

[0076] Twenty-two first thermocouples are connected to the first experimental fixture 7 , and two of the twenty-two first thermocouples form a group for detecting the temperature value at the same radial position, and the average value of the two temperature values ​​at the same radial position is the temperature value at the current radial position.

[0077] Eight second thermocouples are connected to the second experimental fixture 8. Two of the eight second thermocouples form a group for detecting the temperature value at the same thickness position. The average of the two temperature values ​​at the same thickness position is the temperature value at the current thickness position.

[0078] The output signal of the pressure sensor 12 is 0-10V, and data is collected every 1 second.

[0079] The first thermocouple and the second thermocouple have a head diameter of 0.25 mm and a length of 1 m.

[0080] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable sweating cooling effect test system, characterized in that: It comprises a liquid supply mechanism, which comprises a micro-injection pump, a three-way joint and a liquid supply pipeline, and the outlet of the micro-injection pump is connected to the liquid supply pipeline and the pressure sensor respectively through the three-way joint; Also included is a first experimental fixture applicable to sheet-shaped test pieces and a second experimental fixture applicable to block-shaped test pieces; The first experimental fixture comprises a first base, a liquid supply vertical pipe and a supporting member, the bottom of the first base is detachably connected to the liquid supply pipeline, the bottom of the liquid supply vertical pipe is plugged into the first base and connected to the liquid supply pipeline, the top of the liquid supply vertical pipe is plugged into the supporting member, the supporting member comprises a sheet-like test piece, a gasket and a heat insulation sheet that are glued together from top to bottom, and the top of the liquid supply vertical pipe is connected to the bottom of the sheet-like test piece; The second experimental fixture comprises a second base, a heat-insulating cover and a reflective film, the second base is provided with a mounting groove for embedding the block test piece, the mounting groove and the block test piece are sealed by a sealant, and the bottom of the base is provided with a docking hole for docking the liquid supply pipeline and the bottom of the block test piece; The heat-insulating cover is sleeved on the periphery of the second base, the heat-insulating cover is provided with an exposure opening for exposing the upper surface of the block test piece, and the rest of the heat-insulating cover except the exposure opening is covered with the reflective film; It also includes an infrared heating lamp for providing heat to the test piece, a light homogenizer is installed between the infrared heating lamp and the first experimental fixture, and a plano-convex lens is installed between the infrared heating lamp and the second experimental fixture; It also includes an infrared thermal imager for collecting the surface temperature of the test piece and a thermocouple assembly for collecting the internal temperature of the test piece. The thermocouple assembly includes a first thermocouple for sensing the temperature at different radial positions on the bottom of the sheet test piece and a second thermocouple for sensing the longitudinal temperature at different thickness positions of the block test piece.

2. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: The gasket is provided with a through hole for passing a first thermocouple, and the first thermocouple is used to abut against the bottom of the sheet-like test piece.

3. The adjustable sweating cooling effect testing system according to claim 2, characterized in that: The gasket is provided with four circumferentially arranged perforation groups, and each perforation group is provided with the perforations extending radially outward from the side adjacent to the docking hole to the side away from the docking hole.

4. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: The side wall of the block-shaped test piece is provided with a through hole arranged longitudinally for passing a second thermocouple, and the second thermocouple is used to abut against the side wall of the block-shaped test piece.

5. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: It also includes an integrated frame, on which the infrared thermal imager, the infrared heating lamp, the microinjection pump, the three-way connector and the pressure sensor are installed; The first experimental jig and the second experimental jig can be detachably switched under the infrared heating lamp.

6. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: The first experimental fixture comprises a first lifting platform, the first base is installed on the first lifting platform, a first telescopic frame is installed on the first lifting platform, and the first telescopic frame is detachably connected to the light homogenizing sheet; The second experimental fixture comprises a second lifting platform, the second base is installed on the second lifting platform, a second telescopic frame is installed on the second lifting platform, and the second telescopic frame is detachably connected to the plano-convex lens.

7. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: The diameter of the plano-convex lens is 50 mm, the upper side of the plano-convex lens is a plane, the lower side of the plano-convex lens is a convex surface, and the thickness of the plano-convex lens at the maximum thickness is 19.2 mm; The diameter of the light homogenizer is 50 mm, and the light homogenizer is double-sided frosted glass with a roughness of 1500 mesh and a thickness of 2 mm.

8. The adjustable sweating cooling effect testing system according to claim 1, characterized in that: The three-way joint is connected to the liquid supply pipeline via a pagoda head and sealed with raw tape; the three-way joint is connected to the pressure sensor via threads and sealed with raw tape; the first base and the second base are both connected to the liquid supply pipeline via M6 threads, and the interface is sealed with raw tape.

9. The testing method of the adjustable sweating cooling effect testing system according to claim 1, characterized in that: The steps include: Step 1: Determine and select the first experimental fixture or the second experimental fixture according to the size type of the test piece to fix and assemble the test piece; Step 2, turning on the infrared heating lamp to heat the area where the test piece is located; Step 3: When the temperature change difference detected by the thermocouple assembly and the infrared thermal imager is less than 1°C, the micro-injection pump is turned on to inject water, and the infrared thermal imager is used to collect the surface temperature and perform real-time surface temperature data monitoring; the thermocouple assembly is used to monitor the internal temperature data of the test piece; A pressure sensor is used to monitor the pressure at the entrance of the test piece in real time; The computer stores the data collected by the pressure sensor, the infrared thermal imager and the thermocouple assembly.

10. The testing method of the adjustable sweating cooling effect testing system according to claim 9, characterized in that: In step 3, the acquisition frequency of the infrared thermal imager is 50HZ, that is, the temperature data can be collected 50 times per second; Twenty-two first thermocouples are connected to the first experimental fixture, and two of the twenty-two first thermocouples form a group for detecting the temperature value at the same radial position, and the average value of the two temperature values ​​at the same radial position is the temperature value at the current radial position; Eight second thermocouples are connected to the second experimental fixture. Two of the eight second thermocouples form a group and are used to detect the temperature value at the same thickness position. The average of the two temperature values ​​at the same thickness position is the temperature value at the current thickness position. The output signal of the pressure sensor is 0-10V, and data is collected every 1s.

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