强冲击LY12铝靶产生闪光的辐射强度演化特征

采用理论推导与实验相结合的方法，研究了强冲击LY12铝靶产生闪光的辐射强度演化特征。利用建立的光纤瞬态高温计测量系统与二级轻气炮加载系统，进行了6种实验条件下的强冲击实验。每组实验使用1组光纤探头，光纤探头直接对准碰撞点安装。通过实验所获原始数据结合标定得到了闪光辐射强度随时间的变化关系。实验结果表明，在给定实验条件及光纤探头安装方案下，闪光信号上升阶段的上升系数和衰减阶段的衰减系数在1～5之间。弹丸入射角度相同时，冲击速度越大，最大闪光辐射强度也越大。LY12铝弹丸强冲击LY12铝靶产生的最大闪光辐射强度,对测量波长为488～667 nm范围内的幂指数值在7.5～9.0之间变化。

Evolutionary characteristics of radiation intensity for light flash created by strong shock LY12 aluminum target

Evolutionary characteristics of radiation intensity for light flash generated by shocking strongly LY12 aluminum target were studied by the way to theoretical derivation and experiment. Experiments were performed under six kinds of experimental conditions using established optical pyrometer measurement system, which was loaded by two-stage light gas gun system. One set of optical fiber probe was used in every experiment, installed directly into impact point. Relationships of light flash radiation intensity were acquired by original data from experiment combined with calibration. Experimental results show that the power exponents of rising phase and decay phase for the light flash radiation signals were between 1 and 5 under current experimental condition and optical fiber probe scheme. The maximum light flash intensity increased with impact velocity increasing at the same incidence angles of the projectile. Variations of power exponent of maximum light flash radiation intensity produced by LY12 Aluminum projectile into LY12 aluminum target were 7.5 to 9.0 for wavelength in the range from 488 nm to 667 nm.