Testing system and testing method for material ablation test

Abstract

The invention relates to the technical field of material testing, in particular to a material ablation test system and method, and the system comprises an oxygen supply subsystem, an acetylene supply subsystem, a combustor measurement and control subsystem, a sample measurement and control subsystem, a test platform and control equipment; wherein the test platform is provided with a first slide rail, a scale belt, a sample storage box and a sample collection box in the sample measurement and control subsystem, a positioning slide block in the combustor measurement and control subsystem, and a sample clamping seat in the sample measurement and control subsystem, which are respectively connected with the first slide rail in a sliding manner; an oxyacetylene premixing chamber, a distance measuring and temperature measuring instrument and an oxyacetylene combustion nozzle in the combustor measurement and control subsystem are arranged on a positioning sliding block, an oxygen supply subsystem and an acetylene supply subsystem are respectively connected with the oxyacetylene premixing chamber, and a temperature sensor and a heat flow sensor in the sample measurement and control subsystem are respectively connected with a sample clamping seat; according to the invention, the accuracy of the material ablation test result is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of material testing, and particularly to a material ablation test system and a test method. Background Art

[0002] When a reusable rocket vehicle returns to the Earth's atmosphere at high speed, it will encounter extreme high temperatures and strong heat flux shocks. The material on the surface of the rocket body is prone to ablation due to this. Since the rocket body material often uses composite materials, the physical property parameters of the materials change non-linearly and relevant data is lacking. Moreover, the ablation process is quite complex, involving a series of physical and chemical changes, making it difficult to obtain valuable reference results through engineering estimation or simulation calculation. Therefore, it is of great significance to analyze and design materials through ablation experiments of the materials.

[0003] In related technologies, an ablation test system can usually simulate the ablation environment of a rocket vehicle in the atmosphere with manual cooperation to conduct ablation experiments on materials.

[0004] However, the ablation test systems provided in related technologies that require manual participation consume human resources. At the same time, due to the limitations of the ablation test system's capabilities, there is a problem that the difference between the test heat flux value and the target test heat flux value is relatively large, resulting in poor accuracy of the determined test results. Summary of the Invention

[0005] In view of the above problems, the present disclosure is proposed. The present disclosure provides a material ablation test system and a test method, which can achieve fully automated testing of material ablation and improve the accuracy of the obtained test results.

[0006] According to one aspect of the present disclosure, a material ablation test system is provided, including: an oxygen supply subsystem, an acetylene supply subsystem, a burner measurement and control subsystem, a sample measurement and control subsystem, a test platform, and a control device. The control device is respectively connected to the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem, and the test platform;

[0007] Wherein, a first slide rail, a scale tape, a sample storage box and a sample collection box in the sample measurement and control subsystem, a positioning slider in the burner measurement and control subsystem, and a sample holder in the sample measurement and control subsystem are arranged on the test platform. The positioning slider in the burner measurement and control subsystem, and the sample holder in the sample measurement and control subsystem are respectively slidably connected to the first slide rail. An oxygen-acetylene premixing chamber, a ranging and temperature measuring instrument, and an oxygen-acetylene combustion nozzle in the burner measurement and control subsystem are arranged on the positioning slider. One end of the nozzle of the oxygen-acetylene combustion nozzle is close to the sample holder. The oxygen supply subsystem and the acetylene supply subsystem are respectively connected to the oxygen-acetylene premixing chamber. A temperature sensor and a heat flux sensor in the sample measurement and control subsystem are respectively connected to the sample holder.

[0008] According to another aspect of the present disclosure, a method for testing material ablation is provided. The method is applied to the above-mentioned material ablation test system and includes:

[0009] In response to detecting a test configuration operation, the control device sends a test instruction to the test platform and the burner measurement and control subsystem;

[0010] In response to the test instruction, the test platform controls the sample holder to move to the position of the sample storage box to clamp the sample material, and sends the pre-test material parameters measured to the control device;

[0011] In response to the test instruction, the burner measurement and control subsystem adjusts the oxyacetylene combustion nozzle to a position coplanar with the end face of the positioning slider close to the sample holder, and cooperates with the test platform to adjust the oxyacetylene combustion nozzle to a position where the center of the oxyacetylene combustion nozzle is collinear with the center of the sample material in the horizontal direction;

[0012] The test platform controls the heat flux sensor to fit the central area of the first side of the sample material, and controls the temperature sensor to be close to the second side of the sample material, where the first side of the sample material is the side of the sample material close to the positioning slider, and the distance between the temperature sensor and the second side is less than the distance threshold;

[0013] After the oxyacetylene combustion nozzle provides a stable flame, the test platform controls at least one of the positioning slider and the sample holder to slide, and after determining that the positioning slider and the sample holder are separated by an initial ablation distance based on the scale tape, a material ablation test is performed, where the initial ablation distance is determined based on the target test heat flux value input by the test configuration operation and a pre-constructed relationship model between the heat flux value and the ablation distance. The flame provided by the oxyacetylene combustion nozzle is obtained after the oxygen supply subsystem and the acetylene supply subsystem receive the gas supply instruction sent by the control device and react oxygen and acetylene in the oxyacetylene premixing chamber;

[0014] During the test, if the current heat flux value collected by the heat flux sensor is different from the target test heat flux value, the test platform controls at least one of the positioning slider and the sample holder to move again until the current heat flux value collected by the heat flux sensor is the same as the target test heat flux value. When the temperature value collected by the temperature sensor is the same as the preset temperature value, it is determined that the test is completed. At the same time, the sample holder is controlled to move to the sample collection box for post-test sample recovery, and the test data is sent to the control device, where the test data includes the measured ablation distance, ablation duration of the positioning slider and the sample holder determined based on the ranging and temperature measuring instrument during the test, and the material parameters after the test.

[0015] The material ablation test system and test method provided by the embodiments of the present disclosure, on the one hand, allow the cooperation between the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem, the sample measurement and control subsystem, and the test platform to be controlled by the control device, so as to perform fully automated testing of the material ablation test without manual participation, improving the test efficiency and accuracy; on the other hand, the positioning slider and the sample holder that are slidably connected to the slide rail in the test platform allow the measured heat flux value to be equal to the target test heat flux value configured in the experiment by controlling the movement of the positioning slider and / or the sample holder during the experiment, thereby improving the accuracy of the obtained test results.

[0016] It should be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By describing the embodiments of the present disclosure in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present disclosure will become more apparent. The drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation to the present disclosure. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1 is a schematic diagram of the first material ablation test system according to an embodiment of the present disclosure.

[0019] Figure 2 is a schematic diagram of the second material ablation test system according to an embodiment of the present disclosure.

[0020] Figure 3 is a schematic diagram of the third material ablation test system according to an embodiment of the present disclosure.

[0021] Figure 4 is a schematic diagram of the fourth material ablation test system according to an embodiment of the present disclosure.

[0022] Figure 5 It is a schematic diagram of the fifth material ablation test system of the embodiments of the present disclosure.

[0023] Figure 6 It is a schematic flowchart of a material ablation test method of the disclosed embodiments.

[0024] Figure 7 A schematic diagram of a material ablation test system in a test state of the embodiments of the present disclosure.

[0025] Figure 8 It is a schematic diagram of the first side of a sample material of the embodiments of the present disclosure.

[0026] Figure 9 It is a schematic diagram of a relationship model between heat flux value and ablation distance of the embodiments of the present disclosure.

[0027] Figure 10 It is a schematic diagram of another relationship model between heat flux value and ablation distance of the embodiments of the present disclosure. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present disclosure more apparent, exemplary embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. It should be understood that the present disclosure is not limited by the exemplary embodiments described herein.

[0029] To solve the above problems, the embodiments of the present disclosure provide a material ablation test system, as Figure 1 shown, the material ablation test system A includes: an oxygen supply subsystem A1, an acetylene supply subsystem A2, a burner measurement and control subsystem A3, a sample measurement and control subsystem A4, a test platform A5, and a control device A6. The control device A6 is respectively connected to the oxygen supply subsystem A1, the acetylene supply subsystem A2, the burner measurement and control subsystem A3, and the test platform A5. The control device can be an electronic device such as a computer, a notebook, or a tablet computer;

[0030] Among them, a first slide rail A51, a scale tape A52, a sample storage box A41 and a sample collection box A42 in the sample measurement and control subsystem A4, a positioning slider A31 in the burner measurement and control subsystem A3 are arranged on the test platform A5, and a sample clamping seat A43 in the sample measurement and control subsystem A4 is slidably connected to the first slide rail A51 respectively. An oxygen-acetylene premixing chamber A32, a ranging and temperature measuring instrument A34 and an oxygen-acetylene combustion nozzle A35 in the burner measurement and control subsystem A3 are arranged on the positioning slider A31. One end of the nozzle of the oxygen-acetylene combustion nozzle A35 is close to the sample clamping seat A43. The oxygen supply subsystem A1 and the acetylene supply subsystem A2 are respectively connected to the oxygen-acetylene premixing chamber A32. A temperature sensor A44 and a heat flux sensor A45 in the sample measurement and control subsystem A4 are respectively connected to the sample clamping seat A43.

[0031] It should be noted that in the embodiments of the present disclosure, the control device serves as the control center of the material ablation test system, and can be used by users to perform experimental configuration operations. Users can configure the configuration information during the test through the control device, and after the test configuration is completed, control the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem, the sample measurement and control subsystem and the test platform to cooperate with each other based on the configuration information to perform the material ablation test. Among them, the configuration information includes the target test heat flux value, and the number of the target test heat flux values can include at least one.

[0032] In the scenario of performing a test based on the material ablation test system provided by the embodiments of the present disclosure, the control device A6 sends a test instruction to the test platform A5 and the burner measurement and control subsystem A3 in response to detecting a test configuration operation;

[0033] The test platform A5 responds to the test instruction, controls the sample clamping seat A43 to move to the position of the sample storage box A41 to clamp the sample material, and sends the measured material parameters before the test to the control device A6; among them, the material parameters before the test include the thickness and weight of the sample material before the test.

[0034] The burner measurement and control subsystem A3 responds to the test instruction, adjusts the oxygen-acetylene combustion nozzle A35 to a position coplanar with the end face of the positioning slider close to the sample clamping seat, and cooperates with the test platform to adjust the oxygen-acetylene combustion nozzle A35 to a position where the center of the oxygen-acetylene combustion nozzle A35 is collinear with the center of the sample material in the horizontal direction;

[0035] The test platform A5 controls the heat flux sensor A45 to fit the central area of the first side of the sample material, and controls the temperature sensor A44 to be close to the second side of the sample material. Here, the first side of the sample material is the side of the sample material close to the positioning slider, and the distance between the temperature sensor and the second side is less than the distance threshold. The distance threshold can be determined based on actual needs, and the embodiments of the present disclosure do not limit this. For example, the distance threshold can be 5 mm.

[0036] After the oxyacetylene combustion nozzle A35 provides a stable flame, the test platform A5 controls at least one of the positioning slider A31 and the sample holder A43 to slide. After determining the initial ablation distance between the positioning slider A31 and the sample holder A43 based on the scale tape A52, a material ablation test is carried out. The initial ablation distance is determined based on the target test heat flux value input by the test configuration operation and the pre-constructed relationship model between the heat flux value and the ablation distance. The flame provided by the oxyacetylene combustion nozzle is obtained after the oxygen supply subsystem A1 and the acetylene supply subsystem A2 receive the gas supply instruction sent by the control device A6 and react oxygen and acetylene in the oxyacetylene premixing chamber A32. It can be understood that the oxygen supply subsystem can supply oxygen to the oxyacetylene premixing chamber, and the acetylene supply subsystem can supply acetylene gas to the oxyacetylene premixing chamber;

[0037] During the test, if the current heat flux value collected by the heat flux sensor A45 is different from the target test heat flux value, the test platform A5 controls at least one of the positioning slider A31 and the sample holder A43 to move again until the current heat flux value collected by the heat flux sensor A45 is the same as the target test heat flux value. When the temperature value collected by the temperature sensor A44 is the same as the preset temperature value, it is determined that the test is completed. At the same time, the sample holder A43 is controlled to move to the sample collection box A42 for recovering the tested sample, and the test data is sent to the control device A6. The test data includes the measured ablation distance, ablation duration of the positioning slider and the sample holder determined by the distance and temperature measuring instrument during the test, and the material parameters after the test. The material parameters after the test include the mass and thickness of the sample material after the test. The preset temperature value can be determined based on actual needs, and the embodiments of the present disclosure do not limit this. For example, the preset temperature value can be 373 K.

[0038] It should be noted that in the embodiments of the present disclosure, the control device can determine experimental results such as the linear ablation rate of the sample material, the mass ablation rate of the sample material, and / or the adiabatic index of the sample material based on the material parameters of the sample material before the test and the test data. In the embodiments of the present disclosure, the ablation distance refers to the distance between the position where the oxyacetylene combustion nozzle and the end face of the positioning slider close to the sample holder are coplanar and the first side of the sample material.

[0039] In summary, the material ablation test system provided by the embodiments of the present disclosure, on the one hand, allows the cooperation between the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem, the sample measurement and control subsystem, and the test platform to be controlled by a control device, so as to perform fully automated testing of the material ablation test without manual participation, improving the testing efficiency and accuracy; on the other hand, the positioning slider and the sample holder that are slidably connected to the slide rail in the test platform allow the measured heat flux value to be guaranteed to be equal to the target test heat flux value configured in the experiment by controlling the movement of the positioning slider and / or the sample holder during the experiment, thereby improving the accuracy of the obtained test results.

[0040] Wherein, when the number of target test heat flux values includes multiple, the configuration information further includes the ablation duration associated with each target test heat value. Then, the test platform A5 can control at least one of the positioning slider A31 and the sample holder A43 to slide based on the multiple initial ablation distances determined by each target test heat flux value, so that the ranging and temperature measuring instrument A34 measures that the positioning slider A31 and the sample holder A43 are successively separated by each initial ablation distance. After the positioning slider A31 and the sample holder A43 are separated by each initial ablation distance, control the oxyacetylene combustion nozzle A35 to provide a stable flame, and perform the material ablation test according to the ablation duration associated with each initial ablation distance. Wherein, when the temperature value collected by the temperature sensor A44 is the same as the preset temperature value at the last initial ablation distance, it is determined that the test is completed, and the test data collected at each initial ablation distance is sent to the control device A6.

[0041] It should be noted that during the process of the test platform controlling at least one of the positioning slider and the sample holder to slide so that the ranging and temperature measuring instrument measures that the positioning slider and the sample holder are successively separated by each initial ablation distance, the sample holder can be kept fixed and the positioning slider can be controlled to slide to simulate the combustion scenario of the heat source approaching the material; or, the positioning slider can be kept fixed and the sample holder can be controlled to move and slide to simulate the combustion scenario of the material approaching the heat source; or, both the sample holder and the positioning slider can be controlled to move and slide to simulate the combustion scenario of the material and the heat source approaching each other. Specifically, it can be determined based on user configuration, and the present disclosure does not limit this; it is allowed that the user can control the positioning slider and the sample holder to slide with different sliding strategies during an ablation test to realize the testing of the material ablation situation under various combustion scenarios, improving the richness of the applicable scenarios of the material ablation test system.

[0042] It can be understood that during the ablation test process when the positioning slider and the sample holder are separated by each initial ablation distance in turn, if the current heat flux value collected by the heat flux sensor is different from the target test heat flux value associated with the initial ablation distance, the test platform controls at least one of the positioning slider and the sample holder to move again until the current heat flux value collected by the heat flux sensor is the same as the target test heat flux value, and then the ablation experiment is carried out to ensure the accuracy and reliability of the test data collected during the ablation test at the initial ablation distance corresponding to each target test heat flux value.

[0043] In an alternative embodiment, as Figure 1 shown, the end face of the positioning slider A31 close to the test platform A5 is slidably connected to the first slide rail A51 through a telescopic rod. So as to facilitate adjusting the height of the oxyacetylene combustion nozzle located on the positioning slider through controlling the telescopic rod in the experimental scenario, so as to quickly align the center of the oxyacetylene combustion nozzle with the center of the sample material.

[0044] In an alternative embodiment, as Figure 1 shown, after the oxyacetylene premixing chamber A32, the oxyacetylene combustion nozzle A35 and the ranging and temperature measuring instrument A34 are integrated, they are arranged on the end face of the positioning slider A31 away from the test platform A5 through an adjustable bracket, wherein the adjustable bracket can realize the omnidirectional position adjustment of the oxyacetylene combustion nozzle; so as to facilitate adjusting the height of the oxyacetylene combustion nozzle located on the positioning slider through controlling the adjustable bracket in the experimental scenario, so as to realize the accurate alignment of the center of the oxyacetylene combustion nozzle with the center of the sample material.

[0045] It should be noted that in the embodiments of the present disclosure, the structures of the adjustable bracket and / or the telescopic rod can be determined according to actual needs, and the embodiments of the present disclosure do not limit this; the burner measurement and control subsystem adjusts the position of the oxyacetylene combustion nozzle by adjusting the adjustable bracket, and the test platform adjusts the height of the positioning slider in the vertical direction by adjusting the telescopic rod.

[0046] In an alternative embodiment, as Figure 2As shown in the figure, the oxygen supply subsystem A1 includes multiple oxygen cylinders A11, multiple oxygen cylinder clamps A12, multiple oxygen cylinder electric control valves A13, and an oxygen cylinder group storage box A14. Among them, each oxygen cylinder A11 is fixed in the oxygen cylinder group storage box A14 through an oxygen cylinder clamp A12, and multiple oxygen cylinders A11 are connected in parallel through the oxygen cylinder electric control valves A13 provided at the outlets. The multiple oxygen cylinder electric control valves A13 are connected to the oxyacetylene premixing chamber A32 through an oxygen supply pipeline. The stability of the oxygen gas supplied to the oxyacetylene premixing chamber can be ensured through multiple parallel oxygen cylinders, thereby improving the stability of the oxyacetylene ejected from the oxyacetylene combustion nozzle during the ablation experiment based on the material ablation test system, and thus ensuring the reliability of the experiment.

[0047] Among them, the oxygen cylinder electric control valve is used to automatically open to supply oxygen to the oxyacetylene premixing chamber and detect the oxygen content after receiving the gas supply instruction sent by the control device. At the same time, the detection result is sent to the control device.

[0048] It should be noted that in the embodiment of the present disclosure, as Figure 2 shown, the oxygen supply pipeline includes an oxygen pressure regulating valve A15, an oxygen flow regulating valve A16, an oxygen flow meter A17, and an oxygen pressure gauge A18 arranged in sequence, so as to facilitate the oxygen pressure regulating valve to monitor the real-time pressure value of the oxygen pressure gauge during the experiment and perform oxygen pressure regulation when the target oxygen pressure value in the configuration information is inconsistent with the real-time oxygen pressure value; and / or, the oxygen flow regulating valve can monitor the real-time flow value of the oxygen flow meter and perform oxygen flow regulation when the target oxygen flow value in the configuration information is inconsistent with the real-time oxygen flow value to meet the experimental requirements; among them, the monitoring results of the oxygen flow meter and the oxygen pressure gauge can be sent to the control device, and the gas supply instruction sent by the control device to the oxygen supply subsystem includes the target oxygen pressure value and the target oxygen flow value in the configuration information.

[0049] In an alternative embodiment, as Figure 2 shown, the acetylene supply subsystem A2 includes multiple acetylene cylinders A21, multiple acetylene cylinder clamps A22, multiple acetylene cylinder electric control valves A23, and an acetylene cylinder group storage box A24. Among them, each acetylene cylinder A21 is fixed in the acetylene cylinder group storage box A24 through an acetylene cylinder clamp A22, and multiple acetylene cylinders A21 are connected in parallel through the acetylene cylinder electric control valves A23 provided at the outlets. The multiple acetylene cylinder electric control valves A23 are connected to the oxyacetylene premixing chamber A32 through an acetylene supply pipeline. The stability of the acetylene gas supplied to the oxyacetylene premixing chamber can be ensured through multiple parallel acetylene cylinders, thereby improving the stability of the oxyacetylene ejected from the oxyacetylene combustion nozzle during the ablation experiment based on the material ablation test system, and thus ensuring the reliability of the experiment.

[0050] Among them, the electric control valve of the acetylene gas cylinder is used to automatically open to supply acetylene to the oxygen-acetylene premixing chamber and detect the acetylene content after receiving the gas supply instruction sent by the control device. At the same time, the detection result is sent to the control device.

[0051] It should be noted that in the embodiments of the present disclosure, as Figure 2 shown, the acetylene supply pipeline includes an acetylene pressure regulating valve A25, an acetylene flow regulating valve A26, an acetylene flowmeter A27, and an acetylene pressure gauge A28 arranged in sequence, so that during the test, the acetylene pressure regulating valve can monitor the real-time pressure value of the acetylene pressure gauge, and when the target acetylene pressure value in the configuration information is inconsistent with the real-time acetylene pressure value, perform acetylene pressure regulation; and / or, the acetylene flow regulating valve can monitor the real-time flow value of the acetylene flowmeter, and when the target acetylene flow value in the configuration information is inconsistent with the real-time acetylene flow value, perform acetylene flow regulation to meet the test requirements; among them, the monitoring results of the acetylene flowmeter and the acetylene pressure gauge can be sent to the control device, and the gas supply instruction sent by the control device to the acetylene supply subsystem includes the target acetylene pressure value and the target acetylene flow value in the configuration information.

[0052] In an alternative embodiment, as Figure 3 shown, the material ablation test system further includes: a cooling supply subsystem A7. The cooling supply subsystem includes a refrigerant tank A71, a refrigerant pipeline, a thermal protection cooling nozzle A72, and a nozzle support slide bar A73. Among them, the refrigerant tank A71 is connected to the first end of the thermal protection cooling nozzle A72 through the refrigerant pipeline. The first end of the nozzle support slide bar A73 is connected to the second end of the thermal protection cooling nozzle A72, and the second end of the nozzle support slide bar A73 is slidably connected to a second slide rail A53 provided on the test platform A5. During the test, the test platform A5 controls the nozzle support slide bar A73 and the sample holder A43 to slide synchronously within a preset horizontal distance. Among them, the preset horizontal distance can be determined based on actual needs, and the embodiments of the present disclosure do not limit this. The preset horizontal distance can be 5 mm or 8 mm. By controlling the nozzle support slide bar and the sample holder in the cooling supply subsystem to slide synchronously within a preset horizontal distance, the cooling gas sprayed by the thermal protection cooling nozzle connected to the nozzle support slide bar can be sprayed on the sample material held by the sample holder, so as to simulate the material ablation test under the material cooling scenario based on the material ablation test system, and further improve the richness of the applicable scenarios of the material ablation test system.

[0053] Optionally, a hot air outlet is provided on the nozzle support slide bar A73, and the hot air outlet is used to dry the sample material after the ablation test of the sample material, further improving the accuracy of the measured weight after the test.

[0054] It should be noted that in the embodiments of the present disclosure, as Figure 3 shown, the refrigerant pipeline may include a safety valve A74, a flow regulating valve A75, a flow meter A76, a refrigerant pump A77, and a pressure gauge A78 arranged in sequence. During the test, after the refrigerant is pumped out of the refrigerant tank by the refrigerant pump, it is transmitted to the thermal protection cooling nozzle to cool the sample material. Among them, the flow regulating valve can monitor the real-time flow value and real-time pressure value of the flow meter, and when the target refrigerant flow value in the configuration information is inconsistent with the real-time flow value, or the refrigerant pressure is inconsistent with the real-time pressure value, the refrigerant flow is adjusted to meet the test requirements. In addition, the safety valve can ensure the safe transmission of the refrigerant. The refrigerant can be determined based on actual needs, and the embodiments of the present disclosure do not limit this. By way of example, the refrigerant can be water or liquid nitrogen.

[0055] In an alternative embodiment, as Figure 4 shown, the cooling supply subsystem A7 further includes a system cooling outflow pipeline A79 and a system cooling return pipeline A710. The first end of the system cooling outflow pipeline A79 is connected to the refrigerant tank A71, and the second end of the system cooling outflow pipeline A79 is connected to the first end of the cooling pipeline in the test platform A5. The first end of the system cooling return pipeline A710 is connected to the refrigerant tank A71, and the second end of the system cooling return pipeline A710 is connected to the second end of the cooling pipeline in the test platform A5. The refrigerant tank in the cooling supply subsystem can be connected to the cooling pipeline in the experimental platform part through the system cooling outflow pipeline and the system cooling return pipeline to achieve the goal of cooling the test platform by the cooling supply subsystem and improve the safety of the material ablation test system.

[0056] It can be understood that in the embodiments of the present disclosure, the system cooling outflow pipeline is used to transmit the refrigerant in the refrigerant tank to the cooling pipeline in the test platform to cool the test platform, and the system cooling return pipeline is used to transmit the heated refrigerant back to the refrigerant tank for cooling to achieve the cyclic cooling of the experimental platform.

[0057] In an alternative embodiment, as Figure 5 shown, the material ablation test system further includes a fire protection subsystem A8. The fire protection subsystem includes a temperature monitoring device A81 and a fire extinguishing agent A82. When the temperature monitoring device A81 determines that the test temperature exceeds the temperature threshold, the fire extinguishing agent A82 is used for cooling. The temperature monitoring device can be a thermometer or a temperature sensor, and specifically, it can be determined based on actual needs, and the embodiments of the present disclosure do not limit this. The fire protection subsystem can monitor the temperature during the experiment and perform fire protection when the temperature is abnormal, further improving the safety of the material ablation test system.

[0058] In an alternative embodiment, as Figure 5 shown, the material ablation test system further includes: an imaging device A9, and the imaging device A9 is connected to the control device A6. During the test, the imaging device is used to collect the material ablation picture or material ablation video, and send the material ablation picture or material ablation video to the control device.

[0059] In an alternative embodiment, as Figure 5 shown, the material ablation test system may further include: a remote control device A10, and the remote control device A10 is wirelessly connected to the control device A6. The remote control device A10 can be used as another control center of the material ablation test system, which can be used by the user to perform experimental configuration operations and send the configuration information to the control device A6. After the control device A6 obtains the target test heat flux value, it controls the oxygen supply subsystem A1, the acetylene supply subsystem A2, the burner measurement and control subsystem A3, the sample measurement and control subsystem A4, and the test platform A5 to cooperate with each other based on the configuration information to perform the material ablation test; during the test, the control device A6 can send the data returned by each subsystem or device to the remote control device A10 for the user to view; among them, the remote control device can be an electronic device with a display function, for example, a mobile phone, a notebook, a tablet or a wearable device.

[0060] In an alternative embodiment, as Figure 5 shown, the test platform A5 may include a display module A54, and the display module is used to display at least one of the configuration information and the test data collected during the test. Specifically, the user can configure the parameter information that can be displayed by the display module on the test platform through the control device or the remote control device.

[0061] Exemplarily, as Figure 5 shown, the display module of the test platform displays oxygen pressure, acetylene pressure, oxygen flow rate, acetylene flow rate, ablation distance, ablation duration, heat flux value, temperature value, weight before test, weight after test, thickness before test and thickness after test, untested target test heat flux value, tested target test heat flux value, refrigerant pressure and refrigerant flow rate.

[0062] Optionally, as Figure 5 shown, the test platform A5 may further include a control interface A55, and the control interface is used for the user to connect a control device that can control the state of the positioning slider and / or the sample holder to realize the manual control of the position of the positioning slider and / or the sample holder, so as to retain the manual intervention function on the basis of ensuring the automated test of the material ablation test system and improve the test flexibility of the material ablation test system.

[0063] The exemplary embodiments of the present disclosure provide a method for testing material ablation. The method for testing material ablation is applied to the above-mentioned material ablation test system, as Figure 6 shown, and includes:

[0064] Step S601, in response to detecting a test configuration operation, the control device sends a test instruction to the test platform and the burner measurement and control subsystem;

[0065] Step S602, in response to the test instruction, the test platform controls the sample holder to move to the position of the sample storage box to clamp the sample material, and sends the measured material parameters before the test to the control device;

[0066] Step S603, in response to the test instruction, the burner measurement and control subsystem adjusts the oxyacetylene combustion nozzle to a position coplanar with the end face of the positioning slider close to the sample holder, and cooperates with the test platform to adjust the oxyacetylene combustion nozzle so that the center of the oxyacetylene combustion nozzle is collinear with the center of the sample material in the horizontal direction;

[0067] Step S604, the test platform controls the heat flux sensor to fit the central area of the first side of the sample material, and controls the temperature sensor to be close to the second side of the sample material;

[0068] Among them, the range of the central area can be determined based on actual needs, and the embodiments of the present disclosure do not limit this.

[0069] Optionally, during the ablation test, usually the central position of the sample material is ablated. The heat flux sensor is attached to a non-central point in the central area of the first side of the sample material, which can prevent the influence of the heat flux sensor on the ablation test and improve the accuracy of the obtained test data.

[0070] Exemplarily, as Figure 7 shown, Figure 7 shows a schematic diagram of a state of the material ablation test system during the test. Among them, the sample holder A43 clamps the sample material B, and the heat flux sensor A45 is attached to the sample material B; as Figure 8 shown, Figure 8 shows a schematic diagram of the first side of a sample material in the embodiment of the present disclosure. Among them, the heat flux sensor A45 is attached to a non-central point in the central area B1 of the first side of the sample material B.

[0071] Step S605, after the oxyacetylene combustion nozzle provides a stable flame, the test platform controls at least one of the positioning slider and the sample holder to slide, and after determining the initial ablation distance between the positioning slider and the sample holder based on the scale tape, a material ablation test is carried out;

[0072] During the test, if the current heat flux value collected by the heat flux sensor is different from the target test heat flux value, the test platform controls at least one of the positioning slider and the sample holder to move again until the current heat flux value collected by the heat flux sensor is the same as the target test heat flux value.

[0073] Step S606, when the temperature value collected by the temperature sensor is the same as the preset temperature value, the test platform determines that the test is completed, controls the sample holder to move to the sample collection box for post-test sample recovery, and sends the test data to the control device.

[0074] Among them, after determining that the test is completed, the test platform can also control the heat flux sensor and the temperature sensor to move away from the sample material, so as to smoothly recover the post-test sample to the sample collection box.

[0075] In summary, the material ablation test method provided by the embodiments of the present disclosure can, on the one hand, control the cooperation between the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem, the sample measurement and control subsystem, and the test platform through the control device to perform fully automated testing of the material ablation test without manual participation, improving the test efficiency and accuracy; on the other hand, during the experiment, by controlling the positioning slider in the slidable burner measurement and control subsystem and / or the sample holder in the sample measurement and control subsystem to slide, it is ensured that the measured heat flux value is equal to the target test heat flux value configured in the test, thereby improving the accuracy of the obtained test results.

[0076] Among them, the relationship model between the heat flux value and the ablation distance is:

[0077]

[0078] In Formula 1, λ is the heat flux value, and the unit is: kW / m 2 , a, b, and k are all model coefficients, d is the ablation distance, and the unit is: mm; among them, the relationship model between the heat flux value and the ablation distance can be a neural network model, and the model coefficients can be determined by collecting the sample heat flux value and the sample distance during the historical ablation test process using the material ablation test system to train the relationship model between the heat flux value and the ablation distance.

[0079] Exemplarily, as Figure 9 shown, Figure 9 shows a schematic diagram of a relationship model between the heat flux value and the ablation distance provided by the embodiments of the present disclosure, where the horizontal axis is the ablation distance value and the vertical axis is the heat flux value; as Figure 10 shown, Figure 10 shows a schematic diagram of another relationship model between the heat flux value and the ablation distance provided by the embodiments of the present disclosure, where the horizontal axis is the derivative of the ablation distance value and the vertical axis is the heat flux value.

[0080] Optionally, the zero graduation line of the scale tape is located at the middle position of the test platform, and the sliding ranges of the positioning slider and the sample clamping seat are respectively located on both sides of the zero graduation line. Among them, the initial ablation distance between the positioning slider and the sample clamping seat determined based on the scale tape is: before the ablation starts, the sum of the distance from the zero graduation line to the oxyacetylene combustion nozzle and the distance from the zero graduation line to the first side of the sample material. Then, the process by which the control device determines the linear ablation rate of the sample material based on the pre-test material parameters of the sample material and the test data can be realized based on the first formula, where the first formula is:

[0081]

[0082] In Formula 2, R d is the linear ablation rate of the material, with the unit of: mm / s; d* is the maximum measured ablation distance detected in real time, d is the initial ablation distance, with the unit of: mm; d1 is the distance from the zero graduation line to the oxyacetylene combustion nozzle, d2 is the distance from the zero graduation line to the first side of the sample material; t is the ablation time, with the unit: s.

[0083] Among them, the process by which the control device determines the mass ablation rate of the sample material based on the pre-test material parameters of the sample material and the test data can be realized based on the second formula, and the second formula is:

[0084]

[0085] In Formula 3, m0 is the weight before the test, with the unit of: g; m t is the weight after the test, with the unit of: g; t is the ablation duration, with the unit: s; R m is the mass ablation rate of the sample material, g / s.

[0086] Among them, the process by which the control device determines the adiabatic index of the sample material based on the pre-test material parameters of the sample material and the test data can be realized based on the third formula, and the third formula is:

[0087]

[0088] In Formula 4, t T is the time it takes for the temperature of the sample material to rise to the preset temperature; among them, the preset temperature is 373K; d0 is the thickness before the test, with the unit of: mm; I T is the adiabatic index of the sample, with the unit of: s / mm.

[0089] In an alternative embodiment, before the oxyacetylene combustion nozzle provides a flame, the test platform can also control at least one of the positioning slider and the sample holder to slide for a trajectory test; wherein, during the trajectory test, the test platform can control the positioning slider and the sample holder to be at an initial ablation distance apart; by testing the sliding trajectory of the positioning slider and / or the sample holder before the test starts, it is possible to prevent problems such as poor sliding of the positioning slider and / or the sample holder during the test, and ensure the reliability of the automated test process.

[0090] Optionally, after the trajectory test, the test platform can also control the sample holder to slide to a position away from the positioning slider to prevent ineffective ablation of the sample material before the oxyacetylene combustion nozzle provides a stable flame, resulting in inaccurate ablation test results.

[0091] In an alternative embodiment, when the number of target test heat flux values includes multiple ones, the process of the test platform controlling at least one of the positioning slider and the sample holder to slide, and after the ranging and temperature measuring instrument measures that the positioning slider and the sample holder are at the initial ablation distance apart, controlling the oxyacetylene combustion nozzle to provide a stable flame for the material ablation test can include: the test platform controls at least one of the positioning slider and the sample holder to slide based on multiple initial ablation distances determined for each target test heat flux value, so that the ranging and temperature measuring instrument measures that the positioning slider and the sample holder are successively at each initial ablation distance apart, and after the positioning slider and the sample holder are at each initial ablation distance apart, controlling the oxyacetylene combustion nozzle to provide a stable flame, and performing the material ablation test according to the ablation duration associated with each initial ablation distance, so as to realize the test of the material ablation situation under various combustion scenarios.

[0092] It can be understood that when the temperature value collected by the temperature sensor is the same as the preset temperature value after the positioning slider and the sample holder are at the last initial ablation distance apart, it is determined that the test is completed, and the test data collected at each initial ablation distance is sent to the control device.

[0093] In an alternative embodiment, when the material ablation test system further includes a cooling supply subsystem, the control device responds to detecting that the test configuration operation includes a cooling thermal protection activation operation and simultaneously sends a cooling instruction to the cooling supply subsystem. Subsequently, the thermal protection cooling nozzle in the cooling supply subsystem adjusts its angle based on the nozzle angle in the cooling instruction, and transmits the refrigerant in the refrigerant tank to the thermal protection cooling nozzle through the refrigerant pipeline for spraying. Further, when the test platform controls the sample holder to slide, the nozzle support slide bar responds to the movement control instruction of the test platform and slides synchronously with the sample holder within a preset horizontal distance. By controlling the synchronous sliding of the nozzle support slide bar and the sample holder within a preset horizontal distance in the cooling supply subsystem, the cooling gas sprayed by the thermal protection cooling nozzle connected to the nozzle support slide bar can be sprayed onto the sample material held by the sample holder, so as to simulate the material ablation test under the material cooling scenario based on the material ablation test system, and improve the diversity of the obtained test results.

[0094] It should be noted that when the material ablation test system further includes a cooling supply subsystem, after the test platform sends the test data to the control device, the control device can also send a cooling end instruction to the cooling supply subsystem to indicate the end of transmitting the refrigerant in the refrigerant tank to the thermal protection cooling nozzle through the refrigerant pipeline. At the same time, it indicates the opening of the hot air outlet of the nozzle support slide bar to dry the sample material.

[0095] Optionally, when the material ablation test system further includes an imaging device, the control device responds to detecting that the test configuration operation includes an imaging activation operation and sends a shooting instruction to the imaging device. Subsequently, the imaging device responds to the shooting instruction, shoots an ablation test image or an ablation test video, and sends the ablation test image or the ablation test video to the control device in real time.

[0096] It can be understood that after the test platform sends the test data to the control device, the control device can also send a shooting end instruction to the imaging device to turn off the imaging device and reduce the energy consumption of the material ablation test system.

[0097] It should be noted that in the embodiments of the present disclosure, when the material ablation test system further includes an imaging device, after the material ablation test system is turned on, when the temperature monitoring device in the fire protection subsystem determines that the test temperature exceeds the temperature threshold, it cools down with a fire extinguishing agent.

[0098] In an alternative embodiment, after performing the material ablation test method multiple times based on the material ablation test system, the measured heat flux value and the measured ablation distance during the test can be determined as a set of sample data, obtaining multiple sets of sample data; and adding the multiple sets of sample data to the sample data set for training the relationship model between the heat flux value and the ablation distance, obtaining an updated sample data set, and updating the relationship model between the heat flux value and the ablation distance based on the updated sample data set, obtaining an updated relationship model between the heat flux value and the ablation distance. The relationship model between the heat flux value and the ablation distance can be constructed with more sample data to improve the reliability of the obtained relationship model between the heat flux value and the ablation distance.

[0099] The basic principles of the present disclosure have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present disclosure. In addition, the above-disclosed specific details are only for illustrative and facilitating understanding purposes, rather than limitations, and the above details do not limit the present disclosure to necessarily adopt the above specific details for implementation.

[0100] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present disclosure are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0101] In addition, as used herein, the "or" used in the enumeration of items starting with "at least one" indicates a separate enumeration, so that for example, the enumeration of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the term "exemplary" does not mean that the described examples are preferred or better than other examples.

[0102] It should also be noted that in the systems and methods of the present disclosure, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure.

[0103] Various changes, substitutions, and alterations to the technology described herein may be made without departing from the teachings defined by the appended claims. Additionally, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and acts described above. Processes, machines, manufactures, compositions of events, means, methods, or acts that are currently available or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or acts within their scope.

[0104] The foregoing description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0105] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. Although several example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and subcombinations.

Claims

1. A material ablation test system, characterized in that: include: An oxygen supply subsystem, an acetylene supply subsystem, a burner measurement and control subsystem, a sample measurement and control subsystem, a test platform and a control device, wherein the control device is connected to the oxygen supply subsystem, the acetylene supply subsystem, the burner measurement and control subsystem and the test platform respectively; Among them, the test platform is provided with a first slide rail, a scale belt, a sample storage box and a sample collection box in the sample measurement and control subsystem, a positioning slider in the burner measurement and control subsystem, and a sample holding seat in the sample measurement and control subsystem are slidably connected to the first slide rail, the oxyacetylene premixing chamber, the ranging temperature meter and the oxyacetylene combustion nozzle in the burner measurement and control subsystem are arranged on the positioning slider, one end of the nozzle of the oxyacetylene combustion nozzle is close to the sample holding seat, the oxygen supply subsystem and the acetylene supply subsystem are respectively connected to the oxyacetylene premixing chamber, and the temperature sensor and the heat flow sensor in the sample measurement and control subsystem are respectively connected to the sample holding seat.

2. The material ablation test system according to claim 1, characterized in that: The material ablation test system also includes: a cooling supply subsystem, which includes a refrigerant box, a refrigerant pipeline, a thermal protection cooling nozzle and a nozzle support slide bar, wherein the refrigerant box is connected to the first end of the thermal protection cooling nozzle through the refrigerant pipeline, the first end of the nozzle support slide bar is connected to the second end of the thermal protection cooling nozzle, and the second end of the nozzle support slide bar is slidably connected to a second slide rail provided on the test platform. During the test, the test platform controls the nozzle support slide bar and the sample holding seat to slide synchronously within a preset horizontal distance.

3. The material ablation test system according to claim 2, characterized in that: The cooling supply subsystem also includes: a system cooling outlet pipeline and a system cooling return pipeline, wherein the first end of the system cooling outlet pipeline is connected to the refrigerant box, the second end of the system cooling outlet pipeline is connected to the first end of the cooling pipeline in the test platform, the first end of the system cooling return pipeline is connected to the refrigerant box, and the second end of the system cooling return pipeline is connected to the second end of the cooling pipeline in the test platform.

4. The material ablation test system according to claim 1, characterized in that: The material ablation test system further includes: a fire fighting subsystem, which includes a temperature monitoring device and a fire fighting agent, wherein when the temperature monitoring device determines that the test temperature exceeds a temperature threshold, the fire fighting agent is used to reduce the temperature.

5. The material ablation test system according to claim 1, characterized in that: After being integrated, the oxyacetylene premixing chamber, the oxyacetylene combustion nozzle and the range and temperature measuring instrument are arranged on the end surface of the positioning sliding block away from the test platform through an adjustable bracket.

6. The material ablation test system according to claim 1, characterized in that: The end surface of the positioning sliding block close to the test platform is slidably connected to the first sliding rail via a telescopic rod.

7. The material ablation test system according to claim 1, characterized in that: The acetylene supply subsystem includes a plurality of acetylene gas supply cylinders, a plurality of acetylene gas cylinder clamps, a plurality of acetylene gas cylinder electric control valves and an acetylene gas cylinder group storage box, wherein each acetylene gas supply cylinder is fixed in the acetylene gas cylinder group storage box by the acetylene gas cylinder clamp, and the plurality of acetylene gas supply cylinders are connected in parallel by the acetylene gas cylinder electric control valves arranged at the outlet, and the plurality of acetylene gas cylinder electric control valves are connected to the oxygen-acetylene premixing chamber through an acetylene supply pipeline.

8. The material ablation test system according to claim 1, characterized in that: The oxygen supply subsystem includes a plurality of oxygen supply cylinders, a plurality of oxygen cylinder clamps, a plurality of oxygen cylinder electric control valves and an oxygen cylinder group storage box, wherein each oxygen supply cylinder is fixed in the oxygen cylinder group storage box by the oxygen cylinder clamp, and the plurality of oxygen supply cylinders are connected in parallel by the oxygen cylinder electric control valves arranged at the outlet, and the plurality of oxygen cylinder electric control valves are connected to the oxygen-acetylene premixing chamber through an oxygen supply pipeline.

9. A material ablation test method, characterized in that: The method is applied to the material ablation test system as claimed in any one of claims 1 to 8, comprising: The control device sends a test instruction to the test platform and the burner measurement and control subsystem in response to detecting the test configuration operation; The test platform controls the sample holding seat to move to the position of the sample storage box to clamp the sample material in response to the test instruction, and sends the measured pre-test material parameters to the control device; The burner measurement and control subsystem, in response to the test instruction, adjusts the oxyacetylene combustion nozzle to a position coplanar with the end surface of the positioning slider close to the sample holding seat, and cooperates with the test platform to adjust the oxyacetylene combustion nozzle to a position where the center of the oxyacetylene combustion nozzle and the center of the sample material are colinear in the horizontal direction; The test platform controls the heat flux sensor to fit the central area of ​​the first side of the sample material, and controls the temperature sensor to be close to the second side of the sample material, wherein the first side of the sample material is a side of the sample material close to the positioning slider, and the distance between the temperature sensor and the second side is less than a distance threshold; After the oxyacetylene combustion nozzle provides a stable flame, the test platform controls at least one of the positioning slider and the sample holder to slide, and after determining the initial ablation distance between the positioning slider and the sample holder based on the scale tape, performs a material ablation test, wherein the initial ablation distance is determined based on a target test heat flux value input by a test configuration operation, and a pre-constructed heat flux value and ablation distance relationship model, and the flame provided by the oxyacetylene combustion nozzle is obtained after the oxygen supply subsystem and the acetylene supply subsystem receive a gas supply instruction sent by the control device and the oxygen and acetylene react in the oxyacetylene premixing chamber; During the test, if the current heat flux value collected by the heat flux sensor is different from the target test heat flux value, the test platform controls at least one of the positioning slider and the sample holding seat to move again until the current heat flux value collected by the heat flux sensor is the same as the target test heat flux value, and when the temperature value collected by the temperature sensor is the same as the preset temperature value, it is determined that the test is completed. At the same time, the sample holding seat is controlled to move to the sample collection box for post-test sample recovery, and the test data is sent to the control device, wherein the test data includes the measured ablation distance, ablation time, and post-test material parameters of the positioning slider and the sample holding seat determined by the distance measuring and thermometer during the test.

10. The material ablation test method according to claim 9, characterized in that: The material ablation test system further includes a cooling supply subsystem, and the method further includes: The control device sends a cooling instruction to the cooling supply subsystem in response to detecting that the test configuration operation includes a cooling thermal protection turn-on operation; The heat protection cooling nozzle in the cooling supply subsystem adjusts the angle based on the nozzle angle in the cooling instruction, and transmits the refrigerant in the refrigerant box to the heat protection cooling nozzle through the refrigerant pipeline for spraying; In the case where the test platform controls the sliding of the sample holding seat, the nozzle support slide bar responds to the movement control instruction of the test platform and slides synchronously with the sample holding seat within a preset horizontal distance.

Images