关键词: 超高速碰撞, 碰撞闪光, 高温计, Planck辐射, 闪光强度, 闪光温度

Abstract: To investigate the hypervelocity impact-flash characteristics and rules of light flash temperature variation in different impact parameter conditions, an experimental measurement system platform composed of a pyrometer and subsidiary experimental measurement system is established, and preliminary experimental measurements of hypervelocity impact flash are carried out using the platform. According to the basic theory of Planck distribution, flash intensity data of four wavelengths are collected and their fitting temperatures from every experiment are calculated. Thus the history of flash temperatures is obtained. Experimental results show that for aluminum projectile LY12 impacting aluminum target LY12, when the impact angle (the angle between the projectile and the target plane) remains the same and the impact velocity is between 5.35 km/s and 5.97 km/s, impact velocity has no obvious influence on light flash temperature, while with similar impact velocities, the larger the impact angle is, the higher the impact light flash temperature will be.

Key words: hypervelocity impact, impact flash, pyrometers, Planck radiation, flash intensity, flash temperature