Comp.B炸药孔洞塌缩及热点生成的数值模拟  

Numerical Simulation of Pore Collapse and Hot Spot Generation in Comp.B Explosives

作　　者：王茂杰 白桥栋[1] 韩家祥 王进平 贺全彪 WANG Maojie;BAI Qiaodong;HAN Jiaxiang;WANG Jinping;HE Quanbiao(National Key Lab of Transient Physics,Nanjing University of Science and Technology,Jiangsu Nanjing,210094)

机构地区：[1]南京理工大学瞬态物理全国重点实验室,江苏南京210094

出　　处：《爆破器材》2025年第2期21-28,共8页Explosive Materials

摘　　要：炸药内部孔洞塌缩机制是热点生成的主要机制。采用点火增长模型,使用S-ALE算法,在Comp.B炸药中添加微孔洞结构,研究孔洞的存在和孔洞大小对炸药起爆的影响,分析孔洞塌缩和热点生成过程。结果表明,孔洞的存在使炸药内部更容易产生热点,孔洞塌缩过程形成了微射流,微射流冲击孔洞下游内壁面,动能转化为内能,造成能量局部化,导致热点的形成。塌缩过程中,粒子速度达到7936 m/s,最高温度接近6000 K。初始孔洞大小决定热点的大小,孔洞越大,热点尺寸越大;孔洞大小还会影响热点温度,小孔洞的温度升高更快,而大孔洞最终的热点温度更高。The collapse mechanism of internal pores in explosives is the main mechanism for the generation of hotspots.The ignition and growth model was adopted,and the S-ALE algorithm was used.Micro-pore structures were added to Comp.B explosives to study the influence of the existence and size of pores on the initiation of explosives,and the processes of pore collapse and hot spot generation were analyzed.The results show that the existence of pores makes it easier to generate hot spots in explosives.During the pore collapse process,micro-jets are formed.The micro-jets impact the inner wall surface downstream of the pores,and the kinetic energy is converted into internal energy,resulting in energy localization and leading to the formation of hot spots.During the collapse process,the particle velocity reaches 7936 m/s,and the maximum temperature is close to 6000 K.The initial pore size determines the size of the hot spots.The larger the pores are,the larger the hot spots size will be.The pore size also affects the hot spot temperature.The temperature of small pores rises more rapidly,while the final hot spot temperature of large pores is higher.

关 键 词：Comp.B炸药 孔洞 塌缩机制 热点 

分 类 号：TQ560.1[化学工程—炸药化工]