Reaction zone structure of JB-9014 explosive measured by PDV
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摘要: 为了解TATB基JB-9014炸药的爆轰过程，利用火炮驱动飞片加载，采用光子多普勒测速技术，对JB-9014炸药的爆轰反应区结构进行了实验研究。实验中利用火炮发射高速蓝宝石飞片冲击起爆被测炸药，在炸药后表面安装镀膜氟化锂（LiF）窗口测量炸药爆轰时的界面粒子速度，测试过程的时间分辨率小于2 ns。将粒子速度剖面对时间进行一阶求导，通过一阶导数的拐点来确定炸药反应区宽度、反应时间。研究结果表明，钝感炸药JB-9014的反应时间为（0.26±0.02）μs，对应的化学反应区宽度为（1.5±0.2）mm，反应结束点处的压力为27.3 GPa，von Neumann峰处压力为40.3 GPa。Abstract: To understand the detonation reaction process of the TATB-based JB-9014 explosive, experimental measurements of the detonation wave profile of solid explosives using photon Doppler velocimetry (PDV) were performed. Planar detonations were produced by impacting the explosive with a sapphire flyer in a gas gun. Particle velocity wave profiles were measured at the explosive/window interface using PDV. LiF windows with very thin vapor deposited aluminum mirrors were used, and the time resolution of the measuring system was less than 2 ns. The interface velocity histories were derived to determine the reaction zone length and reaction time. The results show that the reaction time of JB-9014 is (0.26±0.02) μs, and the corresponding reaction zone length is (1.5±0.2) mm. The pressure at the end of chemical reaction is 27.3 GPa, the pressure at von Neumann spike is 40.3 GPa.
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表 1 TATB基炸药反应区时间和宽度
Table 1. Time and length of reaction zone for TATB-based explosive
炸药 方法 τ/μs a/mm 来源 备注 JB-9014 激光测速+粒子速度求导 0.26±0.02 1.5±0.2 本文 PBX9502 激光测速+炸药状态方程 0.28 2.1 Sheffield等[7] PBX9502 曲率效应试验+数值模拟 2.9 Wescott等[19] PBX9502 激光测速+数值模拟 0.3 2 Seitz等[8] PBX9502 激光测速+炸药状态方程 0.21±0.02
0.28±0.01Dattelbaum等[20] LiF窗口
Kel-F窗口JB-9014 光电法+粒子速度求导 0.31 1.75 赵同虎等[5] TATB/inert 光电法+粒子速度求导 0.26±0.05 1.24±0.17 Loboiko等[6] 
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