Detonation wave structure of CL-20 composite explosive
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摘要: 基于爆轰数值模拟计算，分析了CL-20混合炸药爆轰反应的特征，设计了炸药与窗口的界面粒子速度测量实验装置；采用激光干涉法，测量了C-1炸药(CL-20/粘合剂/94/6)与窗口的界面粒子速度; 运用先求导、再分段拟合的方法，对界面粒子速度随时间的变化曲线进行了数据处理，确定了炸药爆轰CJ点对应的时间位置；根据CJ点对应的粒子速度，计算获得了炸药的爆轰反应区宽度和CJ爆轰压力。结果显示：密度为1.943 g/cm3的C-1炸药的爆轰反应时间为38 ns，CJ压力为34.2 GPa。Abstract: The detonation reaction of CL-20 composite explosive was numerically simulated to analyze its detonation reaction characteristics, and then an experimental setup was designed for measuring the particle velocity at the explosive-window interface. The laser interference method was used to measure the particle velocity at the interface between the LiF window and the C-1 explosive, and ninety-four percent of the C-1 explosive is CL-20 and six percent is binder by weight. And the measured particle velocity-time curves were processed by the method of derivation and piecewise fitting to determine the corresponding CJ point. According to the corresponding CJ velocity, the reaction time and CJ pressure were determined. The detonation reaction time of the C-1 explosive with the density of 1.943 g/cm3 is 38 ns and the CJ pressure is 34.2 GPa.
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图 2 炸药内部压力历史随轴向距离的变化
Figure 2. Internal pressure history of explosive varied with axial distances
图 5 C-1炸药与窗口的界面粒子速度
Figure 5. Particle velocity at C-1-LiF interface varying with time
图 6 C-1炸药粒子速度导数-时间曲线
Figure 6. Derivative of particle velocity at C-1-LiF interface varying with time
图 7 C-1炸药与LX-19炸药窗口界面粒子速度曲线对比
Figure 7. Comparison of particle velocity curves at explosive-LiF interfaces between C-1 and LX-19
表 1 炸药爆轰反应区参数
Table 1. Parameters for reaction zones of explosivess
炸药 ρ/(g·cm-3) 方法 tCJ/ns x0/mm pCJ/GPa C-1 1.943 实验 38 0.27 34.2 LX-19 1.942 计算 40 0.28 35.2 
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