Chemical reaction zone length of JBO-9021
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摘要: 采用激光干涉测试技术和楔形炸药构型, 对新型钝感高能炸药JBO-9021的爆轰反应区宽度进行了实验研究。实验中在楔形JBO-9021炸药后加镀膜LiF晶体作为测试窗口, 测试受试炸药与测试窗口界面的粒子速度剖面。将粒子速度剖面对时间进行二阶求导, 通过粒子速度剖面的二阶求导曲线上等于零的时刻判读CJ点的时刻, 从而得到化学反应区宽度。研究结果表明, 新型钝感高能炸药JBO-9021的化学反应持续时间为(238±13) ns, 相应的化学反应区宽度为(1.52±0.09) mm。Abstract: In this work we used the laser velocity interferometry for measuring particle velocities and the wedge-shaped test explosive to study the structure of the chemical reaction zone of JBO-9021, a new insensitive high explosive (80 weight% TATB explosive, 15 weight% HMX explosive, 5 weight% binder). We conducted an experiment to achieve the in-situ particle velocity histories of a thin aluminium film between the test explosive and the LiF window that were introduced to obtain the particle velocities at different positions in the wedge-shaped test explosive after detonation. The CJ point of the particle velocity histories for JBO-9021 were derived from a second time derivative of the velocity history of particles from which we successfully obtained the chemical reaction structure, including the chemical reaction duration and the chemical reaction zone length. The results show that the chemical reaction duration of JBO-9021 is (238±13) ns and the chemical reaction zone length of JBO-9021 is about (1.52±0.09) mm. Additionally, they also show that the CJ point obtained from a second time derivative of the particle velocity histories is effective.
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图 2 实验装置
Figure 2. Sketch of experimental facility for studying reaction zone of JBO-9021 explosive
图 3 受试炸药与LiF窗口界面粒子速度随时间的变化曲线
Figure 3. Particle velocity-time curves at the interface between JBO-9021 explosive and LiF window
图 4 修正后的受试炸药与LiF窗口界面粒子速度随时间的变化曲线
Figure 4. Amended particle velocity-time curves at the interface between JBO-9021 explosive and LiF window
图 5 平滑后的受试炸药与LiF窗口界面粒子加速度斜率随时间的变化曲线
Figure 5. Smoothed derivative of acceleration to time-time curves at the interface between JBO-9021 explosive and LiF window
表 1 不同探针处测得的JBO-9021炸药化学反应区宽度
Table 1. Lengths of reaction zone for JBO-9021 explosive at different points
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