High-frequency induction wind tunnel flow field non-equilibrium diagnosis system and method

Abstract

The embodiment of the invention relates to a high-frequency induction wind tunnel flow field non-equilibrium diagnosis system. The system comprises a test device, a first diagnosis unit and a second diagnosis unit. A collimator of the first diagnosis unit emits a laser signal, and the laser signal passes through a flow field of the test device and then is transmitted by the test device, and the transmitted laser signal is received by a receiver of the first diagnosis unit so as to obtain a translational temperature in the flow field. The second diagnosis unit collects radiation luminescence inthe flow field to obtain an electronic temperature in the flow field in the test device. The system also comprises a signal trigger unit for controlling the first diagnosis unit and the second diagnosis unit. Therefore, synchronous measurement of the electronic temperature and the translational temperature in a high-frequency induction plasma heater and the high-temperature flow field after passing through a spray pipe can be realized, and quantitative evaluation of a non-equilibrium characteristic of a high-frequency induction plasma heating wind tunnel flow field can be further realized.

Description

technical field [0001] The embodiments of the present invention relate to the research field of aircraft ground aerodynamic thermal experiments, and in particular to a high-frequency induction wind tunnel flow field unbalance diagnosis system and method. Background technique [0002] The high-frequency induction plasma heater does not have the inherent electrode ablation phenomenon of the traditional arc heater, and can provide a chemically pure high-temperature flow field. It is an important test platform for research fields such as aerodynamic heat assessment of heat-resistant materials for exploration (Mars, Venus, Titan, etc.). The high-frequency induction plasma heater uses high-frequency induction-coupling to transmit energy to the gas, ionizes the gas, and generates high-temperature plasma. This unique heating method makes the flow field of the high-frequency induction plasma heating wind tunnel different from that of the traditional arc wind The flow field in the tu...

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Problems solved by technology

Therefore, only the traditional arc wind tunnel flow field macroscopic parameter measurement such as total temperature, heat flow, pressure and other diagnostic methods can no longer meet the research needs of the above fields. It is necessary to carry out research on non-equilibrium phenomena with physical and chemical processes, and develop reliable and effective New measurement technology, deep into the temperature of each degree of freedom, such as electronic temperature, translational temperature and other parameters quantitative diagnosis, and then realize the effective evaluation of the non-equilibrium characteristics of the high-frequency induction plasma heating wind tunnel flow field

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