Extreme-high-temperature oxygen-containing environment thermal test device for aerospace plane structure and control method

Abstract

The invention discloses a space plane structure extreme high temperature oxygen-containing environment thermal test device which comprises an environment box and a heating unit arranged in the environment box, the heating unit comprises hollow electrodes and a heating body connected between the hollow electrodes, the heating body is located above a test piece, and a glass cover is installed outside the heating body. Hollow channels of the hollow electrodes are communicated with the glass cover; the invention also discloses a control method of the device, which comprises the following steps of: selecting the heating body, the hollow electrode and the glass cover to assemble the thermal test device according to the thermal test temperature condition of the aerospace plane structure, and controlling the protective gas in the glass cover by combining the electronic pressure reducing valve, the safety valve, the one-way valve and the proportional valve. According to the device, the glass cover is arranged outside the heating body, and the protective gas is introduced, so that oxidation failure of the heating body at high temperature is avoided, an extreme high-temperature oxygen-containing environment is accurately simulated, and the accuracy of a thermal test is improved; the control method is easy to operate, and the problem that closed-loop control is fine and complex in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of aircraft structure testing and control, and particularly relates to a thermal testing device and a control method for an extremely high temperature oxygen-containing environment of an aerospace aircraft structure. Background technique [0002] In the ground verification test of hypersonic aircraft and orbitally loaded vehicle, it is necessary to use heaters to conduct thermal tests on the aerospace aircraft structure, and simulate the aerodynamic heating load it bears by inputting heat flow. When the aircraft speed is high, the aerodynamic heating effect is very strong, and the heat flux density of the heat load is very large, forming an extremely high temperature environment. This requires the heater to have a strong heat output capability, and at the same time, the temperature of the heating element in the heater is very high. In order to avoid oxidation of the heating element in the heater in an extre...

AI Technical Summary

Problems solved by technology

In addition, since the aircraft is actually in an oxygen-containing environment during flight, it is difficult to avoid the oxidation of the graphite heating element while simulating the oxygen-containing environment of the aircraft during the thermal test.

[0004] In addition, in the actual thermal test process, in order to ensure the temperature uniformity of the temperature zone in an extremely high-temperature environment, multiple heating elements are usually used to heat at the same time, and the failure of a single heating element directly leads to uneven heat flow distribution in the entire temperature zone, and even the entire temperature zone The voltage at both ends of other heating elements rises, causing the heating element to melt and break at high temperature, which in turn leads to the failure of the anti-oxidation protection method of the heating element

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