Quantitative Diagnosis System of Copper Electrode Ablation in Arc Heater

Abstract

The invention relates to a system for quantitatively diagnosing ablation of a copper electrode of an electro-arc heater. The electro-arc heater (1) generates electric arc through discharge breakdown of a front electrode and a back electrode and heats the entered air to form high-temperature air flow, a radiation collecting unit (2) collects radiation luminescence of the passing high-temperature air flow, and the high-temperature air flow is expanded and accelerated by a spraying pipe (3) and then forms high-speed air flow at the outlet of the spraying pipe; the radiation luminescence collectedby the radiation collecting unit (2) enters multimode optical fiber (4), an optical fiber spectrometer (5) collects the radiation luminescence entering the multimode optical fiber (4), the radiationluminescence is converted into wavelength resolution spectral data by optical grating, and the wavelength resolution spectral data is output to a data analysis unit (6); and the data analysis unit (6)selects a spectral line of target component copper particles to acquire the emission spectral intensity of the target component copper particles, selects oxygen atoms as reference components to obtain the emission spectral intensity of the spectral line of the oxygen atoms, and compares the emission spectral intensity of the target component copper particles with the emission spectral intensity of the oxygen atoms to obtain the molar concentration of the corresponding copper particles.

Description

technical field [0001] The invention relates to an arc heater copper electrode ablation quantitative diagnosis system, which is used in the ground simulation test of the arc heater, and uses the emission spectrum diagnosis technology to obtain the radiation spectrum of the high-temperature airflow downstream of the copper electrode of the arc heater, and monitors the copper particles (510nm, 515nm , 521nm and 578nm) spectral line and the ratio of the emission spectrum intensity of oxygen atom (845nm) spectral line, obtain the mole fraction of copper electrode ablation in the test process. It belongs to the research field of aircraft ground aerodynamic thermal test. Background technique [0002] As the flying speed of the aircraft becomes faster and faster, from supersonic to hypersonic, the thermal protection of the aircraft becomes the top priority in the design of the hypersonic aircraft, and the arc heater is the main ground test platform for the study of the aerodynamic ...

AI Technical Summary

Problems solved by technology

[0003] Due to the high temperature and harsh environment in the arc heater, traditional measurement methods cannot effectively measure the copper electrode ablation during the working process of the arc heater due to its contact measurement characteristics. The quantitative research on electrode ablation has been blank for a long time.

Images