超高速碰撞2A12铝板产生的热辐射演化特征实验研究

为研究超高速碰撞2A12铝板产生的热辐射演化特征,构建了超高速碰撞产生热辐射的测量系统。采用实验测量与理论计算相结合的方法,得到了相近碰撞速度(约3 km/s)、不同弹丸入射角度(弹道与靶板平面的夹角)下的闪光辐射强度、闪光辐射温度、光谱辐射能量、辐射源面积及发光效率的演化过程。结果表明:闪光辐射强度、闪光辐射温度及光谱辐射能量均呈现急剧上升后缓慢衰减的特征,并且随着弹丸入射角度的增加而减小;在闪光辐射温度达到峰值后辐射源面积继续上升;弹丸入射角度越小发光效率越高,实验中发光效率数量级为10~(-5)。

Experimental Research on Evolutionary Characteristics of Thermal Radiation Generated by Hypervelocity Impacting on 2A12 Aluminum Plate

In order to study the evolutionary characteristics of thermal radiation generated by hypervelocity impacting on 2A12 aluminum plate, the measuring system was set up for characteristic measurement of thermal radiation caused by hypervelocity impacting. The methods of experimental measurement and theoretical calculation were adopted to obtain evolutionary processes of flash radiant intensity, flash radiant temperature, spectral radiant energy, radiant source area and luminous efficiency at close impact velocities(about 3 km/s) and different incident angles(the angle between the incident trajectory and the plate). The results indicate that flash radiant intensity, flash radiant temperature and spectral radiant energy all show the evolutionary characteristics of slow fading after rising sharply to the peak value, and decrease with the increase of incident angle. While the radiant source area continues to rise after the flash radiant temperature reaching the peak, the luminous efficiency increases with the decrease of incident angle, and it is in the order of 10^-5 in this paper.