铸装TNT炸药表面热点温度的测量

MEASUREMENT OF THE TEMPERATURE OF SURFACE HOT SPOTS IN CAST TNT

非均匀炸药冲击起爆的热点理论一直是爆轰物理中,人们普遍关心的课题之一。本文对热点温度实验测量工作进行了尝试,叙述了用多通道光学高温计测量非均匀炸药表面热点温度的原理及方法。用实验方法得到在3.44GPa左右的冲击压力下,铸装TNT炸药表面热点温度约为3640K。

The theory of hot spot formation in detonation is a very interesting topic. There are enormous articles discussing about the mechanism of hot spot formation, criterion of intiation and numerical modelling etc. Meanwhile. we have not see any paper published about the experimental measurement of the temperature of hot spot. In this paper, the principle and method of measuring the temperature of surface hot spots in cast TNT after shock loading are described. The measured average surface hot spot temperature isT = 3642 .2 K This temperature is higher than that behind the shock wave in the explosive (400K) or the air shock wave-1300K in front of the explosive. We calculated that the temperature of the shocked air in the half-closed cavity on the surface was 4100K which was approximately in accord with the measured value, so we conclude that it is the average temperature of surface hot spots.