超高速碰撞LY12铝靶产生闪光辐射的速度及角度效应

为了研究超高速碰撞产生闪光辐射的速度及角度效应, 利用建立的瞬态光纤高温计测量系统结合二级轻气炮加载系统, 进行了6种实验条件下的超高速碰撞实验。每组实验使用一组光纤探头, 基于实验所获原始数据结合标定, 通过Matlab编程处理得到了给定实验条件及光纤探头安装条件下, 超高速碰撞LY12铝靶产生的闪光辐射与碰撞速度和弹丸入射角度的关系。实验结果表明, 超高速碰撞LY12铝靶产生的闪光辐射在温度峰值出现前近似与碰撞速度和弹丸入射角度（弹道与靶板平面的夹角）正弦乘积的平方成正比；碰撞闪光辐射在温度峰值出现后近似与碰撞速度和弹丸入射角度正弦乘积的0.75次幂成正比, 与理论推导结果基本吻合。

Impact velocity and incidence angle effects of light flash radiation produced by hypervelocity impact on LY12 aluminum target

In order to investigate velocity and angle effects of light flash radiation produced by hypervelocity impact, experiments have been conducted under six kinds of experimental conditions by using an optical pyrometer measurement system and a two-stage light-gas gun loading system. Each experiment used anoptical fiber probe. The relationship of impact velocity and projectile incidence angle was obtained for hypervelocity impact on LY12 aluminum target, based on original data and calibration by Matlab programmable treatments under given experimental condition and optical fiber probe scheme. Experimental results show that, during hypervelocity impact, the impact light flash radiated temperature is approximately proportional with the square of product of impact velocity and sine of projectile incidence angle (angle between trajectory and target plane) before the radiated temperature reaches its peak, and then it is approximately proportional with the 0.75 power of the product of impact velocity and sine of projectile incidence angle after the peak appearing, which is basically identical with the theoretical derivation.