High-enthalpy high-heat-flow ground simulation test device and test method

Abstract

The invention relates to a high-enthalpy high-heat-flow ground simulation test device and test method. An arc heater heats an entering test medium to form high-temperature airflow, and the high-temperature airflow is expanded and accelerated by a spray pipe to generate a rectangular section subsonic airflow at an outlet of the spray pipe, a first pressure measuring device and a third pressure measuring device respectively measure the outlet pressure P1 of the spray pipe and the vacuum pressure P2 of a test chamber and feed back the pressure P1 and the pressure P2 to a data analysis terminal in real time, and the data analysis terminal gives an instruction according to P1 and P2 values and adjusts the operation parameters of a vacuum pump set and a vacuum valve until the vacuum pressure P2 of the test chamber is matched with the outlet pressure P1 of the spray pipe, a stable working state can be ensured for the subsonic airflow at the outlet of the spray pipe; the data analysis terminal sends an instruction to control a panel support to be adjusted from a negative attack angle to a positive attack angle, a heat flow measuring device and a second pressure measuring device arranged on a panel support measure the surface heat flow value q and the pressure P3 of the panel support in real time and feed back the values to the data analysis terminal, and the needed high heat flow ground simulation test environment is obtained.

Description

technical field [0001] The invention relates to a high-enthalpy and high-heat-flow ground simulation test device, which belongs to the research field of aircraft ground aerodynamic thermal tests. Background technique [0002] The reentry speed of a hypersonic vehicle reaches 7km / s-8km / s, and it faces an aerodynamic and thermal environment with high enthalpy and high heat flow of several 10MW / m2, which puts strict requirements on the simulation capabilities of ground test equipment. The simulation capability of existing arc wind tunnel equipment has its limitations: conventional tubular arc heaters can only simulate medium-low enthalpy, high-pressure aerodynamic thermal environments; segmented arc heaters can simulate medium-enthalpy, medium-high pressure aerodynamic thermal environments; Laminated arc heaters generally can only simulate aerodynamic thermal environments with high enthalpy, medium and low pressure (less than or equal to 1Mpa). At present, high-power arc heate...

AI Technical Summary

Problems solved by technology

The simulation capability of existing arc wind tunnel equipment has its limitations: conventional tubular arc heaters can only simulate medium-low enthalpy, high-pressure aerodynamic thermal environments; segmented arc heaters can simulate medium-enthalpy, medium-high pressure aerodynamic thermal environments; Laminated arc heaters can generally only simulate aerodynamic thermal environments with high enthalpy, medium and low pressure (less than or equal to 1Mpa)

At present, high-power arc heaters capable of simulating high enthalpy, high pressure, and high heat flow in the world are represented by the 70MW H3 high-voltage laminated arc heater of AEDC in the United States. , High-pressure free jet end ablation test, currently lacks relevant test capabilities in China

At the same time, the existing aerothermal ground tests in arc wind tunnels generally adopt the test method of supersonic free jet flow. The power on the thermal material itself is less than 1MW, and most of the energy is dissipated. It is difficult to simultaneously simulate high enthalpy (≥10MJ / kg) and high heat flow (10MW / m2) Test capability of aerodynamic thermal environment

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