Analysis Of Flash Radiation Characteristics Produced By Hypervelocity Impact On LY12 Board

To investigate the evolutionary characteristics of flash radiation intensity、flash radiation temperature and spectrum produced by hypervelocity impact on LY12 board, an experimental measurement system platform was established with two-stage light-gas gun、optical pyrometer and spectrometer measurement system. Through the optical fiber in a given position and azimuth angle of a target board flash is measured, the hypervelocity impact experiments were executed in different velocities at the same angle or in different angles at the same velocity. According to the theory of shock wave and the atomic energy level transition rule, got the evolutionary characteristics of flash produced by aerospace aluminum projectile hypervelocity impact on LY12 board. Therefore, this conclusion had important implications for deep-space exploration and space aerospace unidentified object protection.The curve of flash radiation intensity with time was calculated based on Planck’s blackbody radiation law, experimental results show that:a) flash radiation intensity peaks have approximately linear relationship with impact velocity, the larger the impact velocity is, the higher the flash radiation intensity peaks will be; b) flash radiation intensity peaks at different wavelengths reduce with the impact angle is increased; c) the power exponents of decay phase for flash radiation intensity at the wavelength 550nm were between 1 and 5 under current experimental condition.The curve of flash temperature with time was calculated based on Planck’s blackbody radiation law, experimental results show that:flash radiation temperature peaks in consistent with the time of flash radiation intensity peaks appears, flash radiation temperature peaks rise along with the increase of impact velocity, and flash radiation temperature peaks with approximately linear relationship between the collision velocity Theory derivation formula was deduced by shock wave theory, comparison with experimental results show that they are consistent with each other.The spectral components of projectile and target was got based on the atomic level transition theory, and experimental results show that:a) The aluminum element spectral radiant intensity was higher than that of magnesium; b) Spectral radiant intensity increased with the increase of the impact velocity, and when the impact velocity was higher than 3.2km/s, the amplitude of the spectral radiant intensity increased significantly larger will be.