大长径比、高密实火药床点火管点传火特性的影响因素  

Factors affecting the ignition of a large length-to-diameter ratio igniter tube filled with consolidated charge

作　　者：王珊珊[1] 王浩[2] 张博孜[2] 陶如意[2] 

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《爆炸与冲击》2014年第4期489-494,共6页Explosion and Shock Waves

基　　金：南京理工大学自主科研基金项目(2011YBXM110)

摘　　要：利用计算程序对影响大长径比、高密实火药床点火管点火性能的主要因素进行了对比模拟,讨论了不同结构尺寸和装填条件下的点传火性能,通过对计算结果的分析,总结了结构参数和装填条件对大长径比、高密实火药床点火管点传火性能的影响规律:小孔直径、首孔高度、单位长度小孔面积及装填密度显著影响点火压力及点传火性能;小孔直径、首孔高度及单位长度小孔面积是影响破膜后泄压速度的主要因素,而装填密度会影响药床的透气性及火焰传播的通畅性,均对点火安全性、瞬时性及一致性产生重要影响作用。The main factors which influence ignition performance of igniter tube with large ratio of length to diameter and consolidated charge were compared by simulation with the calculation program,and the ignition performance was analyzed in different construction parameters and charge conditions.The influence law is summarized on construction parameters and charge conditions of igniter tube by analysis of the results.The diameter of fire hole,the height of the first hole,the hole area in unit length and charge density evidently effect on the ignition pressure and ignition characteristics.The diameter of fire hole,the height of the first hole,the hole area in unit length are the primary influencing factors of decompressing velocity after the diaphragm breaking,and the charge density effects on the permeability of charge bed and free movement of flame propagation.All of four factors evidently effect on the safety,the transient characteristics and the conformance of ignition.

关 键 词：爆炸力学 点传火 对比模拟 点火管 两相流 内弹道 

分 类 号：O381[理学—流体力学]