基于反向撞击法的RDX基含铝炸药冲击起爆实验研究  

Shock Initiation Measurement of RDX⁃based Aluminized Explosives with Reverse⁃impact Method

作　　者：裴红波 李淑睿 郭文灿[1] 张旭[1] 郑贤旭[1] PEI Hong-bo;LI Shu-rui;GUO Wen-can;ZHANG Xu;ZHENG Xian-xu(Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621999,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《含能材料》2023年第5期425-430,共6页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(11602248)。

摘　　要：为了研究铝粉对黑索今(RDX)基含铝炸药冲击起爆性能的影响,采用基于反向撞击法的炸药冲击起爆性能测试方法,对铝粉含量分别为0,15%和30%的3种RDX基含铝炸药(RDX/Al)的冲击起爆性能进行了对比研究。该方法通过火炮加载平台驱动炸药撞击LiF窗口,利用光子多普勒测速仪测量炸药与窗口界面粒子速度的变化历程。实验结果表明,该方法具有较高的测试精度(3%)和时间分辨率(5 ns),且对炸药样品的制备要求较低。在相同加载条件下,铝粉含量越高,含铝炸药冲击起爆反应增长越慢,与RDX炸药相比,铝粉含量为30%的RDX基含铝炸药的界面粒子速度达到峰值所需的反应时间增加了47%,表明铝粉的加入使得炸药冲击波感度明显降低,铝粉在含铝炸药冲击起爆过程中主要起到能量稀释的作用。A new shock initiation measuring system is developed with the reverse-impact method,in which the explosive sample was driven by a gas gun and impacted the LiF window at a certain speed.The photonic Doppler velocimetry(PDV)was used to measure the interfacial particle velocity profile between the explosive sample and the LiF window.This measuring system has higher accuracy(3%),higher time resolution(5 ns)and lower requirement of explosive samples than previous shock initiation measuring methods.Moreover,to explore the effect of aluminum powder,the shock initiation characteristics of three RDX-based aluminized explosives(RDX/Al)with different contents of aluminum powder(0,15%and 30%)were investigated by this measuring system.The experimental data indicates that with the same impacting speed,the shock initiation reaction growth becomes slower with a higher content of aluminum powder.The interfacial particle velocity of the RDX-based alumi-nized explosive with 30%aluminum powder requires more time to arrive at a peak value,which is 47%longer than that of the RDX explosive.The aluminum powder makes the shock sensitivity significantly decrease and it plays a dilute role in explosive en-ergy during the shock initiation process of aluminized explosives.

关 键 词：反向撞击法 含铝炸药 冲击起爆 冲击波感度 铝粉含量 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O381[理学—流体力学]