Supersonic flame ablation test system

Abstract

The utility model discloses a hypersonic flame ablation test system. The hypersonic flame ablation test system comprises a clamp arranged on a test bed and used for clamping a workpiece to be tested; the flame jetting device is arranged in front of the test bed; the thermodetector and the camera are respectively arranged on one side of the test bed; the thermocouple is arranged on the back of the to-be-tested workpiece; the gas conveying module and the powder conveying module are respectively connected with the flame jetting module; the control module is electrically connected with the flame jetting device and the gas conveying module. The thermodetector and the thermocouple are respectively and electrically connected with the upper computer; the optical detection device is electrically connected with the camera and the upper computer respectively; according to the utility model, the flame jet module is adopted to jet the supersonic flame, so that the supersonic high-temperature flame flow scouring environment can be truly simulated, the problems of low flame flow speed and insufficient flame temperature in the traditional test means are effectively solved, and the accuracy and reliability of coating performance evaluation are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature thermal shock testing technology for thermal protective coatings, and in particular to a supersonic flame ablation testing system. Background Technology

[0002] As aero engines rapidly develop towards higher thrust-to-weight ratios and higher temperature resistance, the service environment of their internal high-temperature components (such as turbine blades and combustion chambers) is becoming increasingly harsh. They are subjected to the combined impact of ultra-high temperature, high pressure, and supersonic flames for extended periods. To improve the service life of metal substrate components, thermal protective coatings are typically used to protect the surface of hot-end components to meet their long-term stable service requirements in extreme high-temperature environments. However, existing thermal protective coating high-temperature thermal shock performance testing systems have significant limitations.

[0003] Traditional testing systems employ oxygen-acetylene subsonic flames, whose flame velocity, temperature, and thermal shock intensity differ by orders of magnitude from those of real supersonic flames. This makes it impossible to reproduce the coating delamination mechanism caused by dynamic thermo-mechanical coupling effects, and also difficult to simulate high-temperature concentrated heat flow conditions, leading to distorted test results for the high-temperature thermal shock performance of thermal protective coatings. Furthermore, traditional testing systems cannot acquire data such as flame particle velocity and jet morphology from supersonic flames, lacking real-time monitoring capabilities for the dynamic characteristics of the flame. In addition, existing testing systems are mostly designed for single coatings, with limited ranges for ablation distance, angle, and flame velocity adjustment, making it difficult to test general-purpose coating materials. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a supersonic flame ablation testing system to solve the problems of low flame velocity and insufficient dynamic data monitoring in the prior art.

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

[0006] This utility model provides a supersonic flame ablation testing system, including a test bench, a flame jetting device, a gas delivery module, a powder delivery module, a control module, a temperature measuring instrument, a thermocouple, a camera, an optical detection device, and a host computer;

[0007] A test bench, on which the workpiece to be tested and the fixtures for holding the workpiece to be tested are set;

[0008] The flame jet device is set in front of the test bench and is used to concentrate the supersonic flame jet onto the surface of the workpiece to be tested for ablation test.

[0009] The gas delivery module, connected to the flame jet module, is used to provide compressed gas and fuel gas to the flame jet module;

[0010] The powder delivery module, connected to the flame jet module, is used to provide flushing powder to the flame jet module;

[0011] A temperature measuring instrument is installed on one side of the test bench and electrically connected to the host computer. It is used to collect temperature data of the ablated area of ​​the workpiece under test and send the temperature data of the ablated area to the host computer.

[0012] A thermocouple is installed on the back of the workpiece to be tested and electrically connected to the host computer. It is used to collect temperature data of the back of the workpiece and send the temperature data of the back of the workpiece to the host computer.

[0013] A camera, mounted on one side of the test bench and electrically connected to an optical detection device, is used to acquire flame flow images of supersonic flames and send the flame flow images to the optical detection device.

[0014] An optical detection device, electrically connected to a host computer, is used to analyze the image data of the ablation area and send the analysis results to the host computer.

[0015] The flame jet device, gas delivery module, powder delivery module, and host computer are all electrically connected to the control module.

[0016] Optionally, the gas delivery module includes a fuel delivery unit and a compressed gas delivery unit;

[0017] The fuel delivery unit is connected to the flame jet module and is used to provide fuel gas to the flame jet module;

[0018] The compressed gas delivery unit is connected to the flame jet module and is used to provide compressed air as a power source for the flame jet module.

[0019] Optionally, the fuel delivery unit includes a fuel gas tank, an oxygen tank, a first delivery pipe, and a second delivery pipe;

[0020] The output end of the fuel gas tank is connected to the input end of the flame jet module through the first delivery pipe;

[0021] The first delivery pipe is equipped with a first flow control valve, and the input end of the first flow control valve is electrically connected to the output end of the control module.

[0022] The output end of the oxygen tank is connected to the input end of the flame jet module through a second delivery pipe;

[0023] A second flow control valve is installed on the second delivery pipe, and the input end of the second flow control valve is electrically connected to the output end of the control module.

[0024] Optionally, the compressed gas delivery unit includes an air compressor, an air dryer, a gas tank, and a third delivery pipe;

[0025] The output end of the air compressor is connected to the input end of the air dryer, and the output end of the air dryer is connected to the input end of the air storage tank.

[0026] The output end of the gas storage tank is connected to the input end of the flame jet module through a third delivery pipe;

[0027] A third flow control valve is installed on the third delivery pipe, and the input end of the third flow control valve is electrically connected to the output end of the control module.

[0028] Optionally, the powder conveying module includes a powder storage tank, a powder feeder, and a fourth conveying pipe;

[0029] The output end of the powder storage tank is connected to the input end of the powder feeder, and the output end of the powder feeder is connected to the input end of the flame jet module through the fourth conveying pipe;

[0030] A fourth flow control valve is installed on the fourth delivery pipe, and the input end of the fourth flow control valve is electrically connected to the output end of the control module.

[0031] Optionally, the flame jet module includes a supersonic flame gun, a robotic arm, and a connector;

[0032] The top end of the supersonic flame gun is fixedly connected to the bottom end of the connector, and the top end of the connector is fixedly installed on the end of the robotic arm to adjust the relative position of the supersonic flame gun and the workpiece to be tested through the robotic arm, so as to control the ablation distance and angle of the flame to the workpiece to be tested.

[0033] The input end of the robotic arm is electrically connected to the output end of the control module.

[0034] Optionally, it may also include a ventilation and dust collection module; the ventilation and dust collection module includes a fan, an exhaust port, and an exhaust pipe;

[0035] The air inlet of the exhaust port is located at the rear of the test bench, and the exhaust outlet is connected to the outside through an exhaust pipe.

[0036] The ventilator is installed at the exhaust end of the exhaust port, and the ventilator is electrically connected to the control module.

[0037] Optionally, it may also include a gas leak alarm module; the gas leak alarm module includes multiple gas detectors and a gas alarm controller;

[0038] The multiple gas monitors are respectively deployed around the gas delivery module and the test bench to obtain the concentration data of the target gas in the monitoring environment;

[0039] The input terminal of the gas alarm controller is electrically connected to the output terminals of multiple gas detectors to issue an audible and visual alarm signal when the target gas concentration reaches the alarm set value.

[0040] Optionally, the surface of the workpiece to be tested is coated with a thermal protective coating.

[0041] Optionally, the flame jet device is a supersonic flame gun.

[0042] Optionally, the fuel gas includes any one of propane, propylene, acetylene, hydrogen, or liquid kerosene.

[0043] The beneficial effects of the embodiments provided by this utility model include:

[0044] This invention uses a control module to regulate different gas delivery ratios in the gas delivery module and a flame jet module to spray supersonic flames, which can realistically simulate the supersonic high-temperature flame scouring environment. This effectively overcomes the problems of low flame velocity and insufficient flame temperature in traditional testing methods, providing a testing environment that is closer to actual working conditions and significantly improving the accuracy and reliability of coating performance evaluation.

[0045] This invention achieves comprehensive and high-precision dynamic monitoring of the supersonic flame ablation process through a temperature measuring instrument, thermocouple, and optical detection device. It acquires multi-dimensional data such as the temperature of the ablation area, the temperature of the back side of the workpiece under test, and flame flow images, thus solving the problem of insufficient dynamic monitoring methods in the prior art. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0047] Figure 1 A schematic diagram of the supersonic flame ablation system in an embodiment of this specification is shown;

[0048] Figure 2 A schematic diagram of the structure of the supersonic flame gun in the embodiment of this specification is shown;

[0049] Among them, 1 is the supersonic flame torch; 2 is the robotic arm; 3 is the test bench; 4 is the fixture; 5 is the workpiece to be tested; 6 is the thermometer; 7 is the thermocouple; 8 is the camera; 9 is the optical inspection device; 10 is the host computer; 11 is the control module; 12 is the fuel gas tank; 13 is the oxygen tank; 14 is the gas storage tank; 15 is the powder feeder; 16 is the first flow control valve; 17 is the second flow control valve; 18 is the third flow control valve; and 19 is the fourth flow control valve. Detailed Implementation

[0050] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Example 1

[0053] like Figure 1 As shown, this embodiment discloses a supersonic flame ablation testing system, including a test bench 3, a flame jet device, a gas delivery module, a powder delivery module, a control module 11, a temperature measuring instrument 6, a thermocouple 7, a camera 8, an optical detection device 9, and a host computer 10; wherein, the gas delivery module includes a fuel delivery unit and a compressed gas delivery unit;

[0054] In some embodiments, the flame jet device is arranged in front of the test bench 3, the thermometer 6 and the camera 8 are respectively arranged on one side of the test bench 3, the test bench 3 is provided with the workpiece 5 to be tested and the clamp 4 for holding the workpiece 5 to be tested, and the thermocouple 7 is arranged on the back of the workpiece 5 to be tested.

[0055] Specifically, the flame jet device is used to concentrate a supersonic flame jet onto the surface of the workpiece 5 to conduct an ablation test;

[0056] The output end of the powder conveying module is connected to the input end of the flame jet module to provide flushing powder to the flame jet module;

[0057] The output of the fuel delivery unit is connected to the input of the flame jet module to provide fuel gas to the flame jet module;

[0058] The output end of the compressed gas delivery unit is connected to the input end of the flame jet module to provide compressed air as a power source for the flame jet module.

[0059] The output terminal of the thermometer 6 is electrically connected to the input terminal of the host computer 10, and is used to collect temperature data of the ablated area of ​​the workpiece 5 to be tested, and send the temperature data of the ablated area to the host computer 10.

[0060] The output end of thermocouple 7 is electrically connected to the input end of host computer 10, and is used to collect temperature data of the back side of the workpiece 5 to be tested, and send the temperature data of the back side of the workpiece 5 to host computer 10.

[0061] The output of the camera 8 is electrically connected to the input of the optical detection device 9, and is used to acquire flame images of supersonic flames and send the flame images to the optical detection device 9.

[0062] The output of the optical detection device 9 is electrically connected to the input of the host computer 10 to analyze the image data of the ablation area and send the analysis results to the host computer 10.

[0063] The input terminals of the flame jet device, gas delivery module, and powder delivery module are electrically connected to the output terminal of the control module 11, and the input terminal of the control module 11 is electrically connected to the output terminal of the host computer 10.

[0064] For example, the fuel delivery unit includes a fuel gas tank 12, an oxygen tank 13, a first delivery pipe, and a second delivery pipe;

[0065] Specifically, the output end of the fuel gas tank 12 is connected to the input end of the flame jet module through the first delivery pipe; a first flow control valve 16 is provided on the first delivery pipe; the output end of the oxygen tank 13 is connected to the input end of the flame jet module through the second delivery pipe; a second flow control valve 17 is provided on the second delivery pipe.

[0066] For example, the compressed gas delivery unit includes an air compressor, an air dryer, a gas storage tank 14, and a third delivery pipe;

[0067] Specifically, the output end of the air compressor is connected to the input end of the air dryer, and the output end of the air dryer is connected to the input end of the air tank 14; the output end of the air tank 14 is connected to the input end of the flame jet module through the third delivery pipe; a third flow control valve 18 is provided on the third delivery pipe, and the input end of the third flow control valve 18 is electrically connected to the output end of the control module 11.

[0068] In this embodiment, the input terminals of the first flow control valve 16, the second flow control valve 17, and the third flow control valve 18 are electrically connected to the output terminal of the control module 11, respectively, so as to regulate the opening degree of the first flow control valve 16, the second flow control valve 17, and the third flow control valve 18 through the control module 11, so as to adjust the delivery ratio of oxygen, gas combustion and compressed air.

[0069] For example, the powder conveying module includes a powder storage tank, a powder feeder 15, and a fourth conveying pipe;

[0070] Specifically, the output end of the powder storage tank is connected to the input end of the powder feeder 15, and the output end of the powder feeder 15 is connected to the input end of the flame jet module through the fourth conveying pipe; a fourth flow control valve 18 is provided on the fourth conveying pipe, and the input end of the fourth flow control valve 18 is electrically connected to the output end of the control module 11 to regulate the conveying rate of the scouring particles; wherein, the powder storage tank contains scouring powder.

[0071] For example, the flame jet module includes a supersonic flame gun 1, a robotic arm 2, and a connector;

[0072] Specifically, the top end of the supersonic flame spray gun 1 is fixedly connected to the bottom end of the connector. The top end of the connector is fixedly installed on the end of the robotic arm 2 to adjust the relative position of the supersonic flame spray gun 1 and the workpiece 5 to be tested through the robotic arm 2, so as to control the process parameters such as the ablation distance and angle of the flame to the workpiece 5.

[0073] The input end of the robotic arm 2 is electrically connected to the output end of the control module 11, which is used to control the movement of the robotic arm 2. In this embodiment, the supersonic flame torch 1 adopts the DJ2700 supersonic flame torch manufactured by Oerlikon Metco of Switzerland. It uses propane and oxygen as the main fuel. By adjusting the appropriate ratio and equipment parameters, a high-speed, high-temperature, and high-pressure supersonic flame jet can be formed. In actual tests, the supersonic flame of the supersonic flame torch has a unique shape, exhibiting a slender and concentrated jet shape, and producing bright Mach rings.

[0074] For example, the system also includes a ventilation and dust collection module; wherein the ventilation and dust collection module includes a fan, an exhaust port, and an exhaust duct;

[0075] Specifically, the air inlet of the exhaust port is located at the rear of the test bench, and the exhaust end of the exhaust port is connected to the outside through an exhaust pipe; the ventilator is located at the exhaust end of the exhaust port and is electrically connected to the control module to discharge the dust and gas generated by the ablation experiment to the outside under the action of the ventilator and centrifugal force.

[0076] For example, the system also includes a gas leak alarm module; wherein the gas leak alarm module includes multiple gas detectors and a gas alarm controller;

[0077] Specifically, multiple gas monitors are deployed around the gas delivery module and the test bench to obtain concentration data of the target gas in the monitoring environment;

[0078] The input terminal of the gas alarm controller is electrically connected to the output terminals of multiple gas detectors to issue an audible and visual alarm signal when the target gas concentration reaches the alarm set value, so as to remind the experimental personnel of a gas leak accident.

[0079] In this embodiment, the gas alarm controller adopts the JB-TB-AT2020S gas alarm controller host.

[0080] In some embodiments, the surface of the workpiece 5 to be tested is coated with a thermal protective coating, which includes any one or a combination of advanced coatings such as thermal barrier coatings, environmental barrier coatings, sealing coatings and stealth coatings.

[0081] In some embodiments, the fuel gas includes any one of propane, propylene, acetylene, hydrogen, or liquid kerosene.

[0082] In some embodiments, the temperature measuring instrument 6 is an infrared temperature measuring instrument; the camera 8 is a high-speed camera.

[0083] In some embodiments, the optical detection device 9 is a non-contact optical detection device. The non-contact optical detection device uses the Spray Watch 2s system, which analyzes the flame flow image of the supersonic flame to obtain the jet morphology, Mach ring structure, particle trajectory and velocity of the supersonic flame in the image, and can indirectly estimate the speed of the supersonic flame; wherein estimating the speed of the supersonic flame using the Spray Watch 2s system is a prior art method.

[0084] In summary, the supersonic flame gun 1 used in this embodiment can spray supersonic flames, which can realistically simulate the supersonic high-temperature flame flow scouring environment and effectively overcome the problems of low flame velocity and insufficient flame temperature in traditional testing methods. In this embodiment, the control module 11 adjusts the delivery ratio of oxygen, fuel gas and compressed air, which solves the problem of ablation efficiency fluctuation caused by inaccurate pressure ratio control of traditional compression systems.

[0085] In this embodiment, the supersonic flame flow image is acquired by camera 8, and the supersonic flame flow image is analyzed by optical detection device 9. This allows for the acquisition of flame velocity, temperature field distribution, and dynamic ablation behavior of the coating, providing data support for the study of supersonic flame flow characteristics and coating failure mechanisms. In this embodiment, the thermometer 6, thermocouple 7, and optical detection device 9 enable comprehensive and high-precision dynamic monitoring of the supersonic flame ablation process, acquiring multi-dimensional data such as the temperature of the ablation area, the temperature of the back side of the workpiece 5 under test, and the flame flow image, thus solving the problem of insufficient dynamic monitoring methods in the prior art.

[0086] In this embodiment, by controlling the robotic arm 2, the process parameters such as the ablation distance and angle of the supersonic flame to the workpiece 5 under test are adjusted, enabling the supersonic flame to conduct high-temperature thermal shock tests on the coating under test at different temperatures. The testing system in this embodiment has low cost and is versatile, and can adapt to the performance testing of different thermal protection coatings.

[0087] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A supersonic flame ablation test system, characterized by, The test bench, the flame jet device, the gas delivery module, the powder delivery module, the control module, the temperature measuring instrument, the thermocouple, the camera, the optical detection device and the upper computer are connected with each other. The test bench is provided with a workpiece to be tested and a clamp for clamping the workpiece to be tested. The flame jet device is arranged in front of the test bench and is used for concentrating supersonic flame jet on the surface of the workpiece to be tested for ablation test. The gas delivery module is connected with the flame jet module and is used for providing compressed gas and fuel gas for the flame jet module. The powder delivery module is connected with the flame jet module and is used for providing flushing powder for the flame jet module. The temperature measuring instrument is arranged on one side of the test bench and is electrically connected with the upper computer, and is used for collecting temperature data of the ablation area of the workpiece to be tested and sending the ablation area temperature data to the upper computer. The thermocouple is arranged on the back of the workpiece to be tested and is electrically connected with the upper computer, and is used for collecting temperature data of the back of the workpiece to be tested and sending the workpiece back temperature data to the upper computer. The camera is arranged on one side of the test bench and is electrically connected with the optical detection device, and is used for collecting flame flow images of the supersonic flame and sending the flame flow images to the optical detection device. The optical detection device is electrically connected with the upper computer, and is used for analyzing the ablation area image data and sending the analysis result to the upper computer. The flame jet device, the gas delivery module, the powder delivery module and the upper computer are respectively electrically connected with the control module.

2. The system of claim 1, wherein, The gas delivery module comprises a fuel delivery unit and a compressed gas delivery unit. The fuel delivery unit is connected with the flame jet module and is used for providing fuel gas for the flame jet module. The compressed gas delivery unit is connected with the flame jet module and is used for providing compressed air as a power source for the flame jet module.

3. The system of claim 2, wherein, The fuel delivery unit comprises a fuel gas tank, an oxygen tank, a first delivery pipe and a second delivery pipe. The output end of the fuel gas tank is communicated with the input end of the flame jet module through the first delivery pipe. The first delivery pipe is provided with a first flow control valve, and the input end of the first flow control valve is electrically connected with the output end of the control module. The output end of the oxygen tank is communicated with the input end of the flame jet module through the second delivery pipe. The second delivery pipe is provided with a second flow control valve, and the input end of the second flow control valve is electrically connected with the output end of the control module.

4. The system of claim 2, wherein, The compressed gas delivery unit comprises an air compressor, an air dryer, a gas storage tank and a third delivery pipe. The output end of the air compressor is connected with the input end of the air dryer, and the output end of the air dryer is connected with the input end of the gas storage tank. The output end of the gas storage tank is communicated with the input end of the flame jet module through the third delivery pipe. The third delivery pipe is provided with a third flow control valve, and the input end of the third flow control valve is electrically connected with the output end of the control module.

5. The system of claim 1, wherein, The powder delivery module comprises a powder storage tank, a powder feeder and a fourth delivery pipe. The output end of the powder storage tank is connected with the input end of the powder feeder, and the output end of the powder feeder is communicated with the input end of the flame jet module through the fourth delivery pipe. The fourth conveying pipe is provided with a fourth flow control valve, and an input end of the fourth flow control valve is electrically connected with an output end of the control module.

6. The system of claim 1, wherein, The flame spraying module comprises a supersonic flame spraying gun, a mechanical arm and a connecting piece. A top end of the supersonic flame spraying gun is fixedly connected with a bottom end of the connecting piece, and a top end of the connecting piece is fixedly installed on an end head of the mechanical arm, so as to adjust the relative position of the supersonic flame spraying gun and the workpiece to be tested by the mechanical arm, so as to control the ablation distance and angle of the flame to the workpiece to be tested. An input end of the mechanical arm is electrically connected with an output end of the control module.

7. The system of claim 1, wherein, The ventilation and dust collection module comprises a ventilator, an exhaust port and an exhaust pipeline. An air inlet end of the exhaust port is arranged at a rear of the test bench, and an air outlet end of the exhaust port is communicated with the outside through the exhaust pipeline. The ventilator is arranged at the air outlet end of the exhaust port, and the ventilator is electrically connected with the control module.

8. The system of claim 1, wherein, The gas leakage alarm module comprises a plurality of gas monitors and a gas alarm controller. The plurality of gas monitors are respectively arranged around the gas conveying module and the test bench, so as to obtain concentration data of the target gas in the monitoring environment. Input ends of the gas alarm controller are respectively electrically connected with output ends of the plurality of gas monitors, so as to send out an audible and visual alarm signal when the concentration of the target gas reaches an alarm setting value.

9. The system of claim 1, wherein, The surface of the workpiece to be tested is coated with a thermal protection coating.

10. The system of claim 1, 2, or 3, wherein, The fuel gas comprises any one of propane, propylene, acetylene, hydrogen or liquid kerosene.

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