Measurement device and method for material oxidation ablation in high-temperature wind tunnel

Abstract

The invention discloses a measurement device and measurement method for material oxidation ablation in a high-temperature wind tunnel. Hyperspectral images of the measured material are shot by adopting a hyperspectral camera; an infrared thermometer obtains a reference temperature of the surface of the measured material; two images of the measured material at different spectral bands are selected, brightness colorimetric values of corresponding same points are calculated, a full-field temperature of the surface of the measured material is calculated on the basis of the reference temperature calibrated by the infrared thermometer, temperature compensation correction is carried out on the hyperspectral images and chemical component analysis is carried out on the surface of the measured material to achieve accurate monitoring of the real-time oxidation condition in the ablation process of the measured material. Chemical components of oxidation and the like are monitored in real time in the ablation process in a high-temperature wind tunnel environment, the full-field temperature distribution of the surface of the measured material is synchronously obtained and the radiation effect caused by temperature change when measured material oxidation is conducted can be eliminated by using a hyperspectral technology.

Description

technical field [0001] The invention relates to the technical field of engineering materials, in particular to a material oxidation and ablation measurement device in a high-temperature wind tunnel and a measurement method thereof. Background technique [0002] Superalloys and composite materials are widely used in aerospace, nuclear energy and other fields due to their good mechanical properties and high temperature resistance. Especially in the structural materials of aviation hypersonic aircraft, the aerodynamic heat borne by the aircraft shape increases with the increase of the aircraft speed. In the case of hypersonic flight, the structural materials on the surface of the aircraft are oxidized due to aerodynamic ablation. Usually, in order to simulate the high-altitude and high-speed flight environment of aircraft, high-temperature simulation experiments are used to test the high-temperature resistance performance of aircraft structural materials. One of the important s...

AI Technical Summary

Problems solved by technology

However, during the ablation process of the material in the high-temperature wind tunnel, the high-temperature radiation light on the surface of the material will affect the radiation spectrum, making it impossible to accurately measure the change of the chemical composition of the material during the ablation process in the high-temperature wind tunnel

Images