火炸药学报2017，Vol.40Issue(5)：39-44,6.DOI:10.14077/j.issn.1007-7812.2017.05.007
一维热爆炸试验传热的数值模拟
Numerical Simulation of Heat Transfer on One-dimensional Time-to-Explosion Test
吴松 1陈均 1李明海1
作者信息
- 1. 中国工程物理研究院总体工程研究所,四川绵阳621900
- 折叠
摘要
Abstract
Aiming at the main heat trasfer problems involved in the heating process,the complex heat transfer model of air layer and the thermal decomposition heat release numerical model of explosive were established,respectively.The effects of system emissivity and convective heat transfer coefficient of air on the thermal ignition delay time of RDX,HMX,HTPB explosive samples when heating by oil bath and air bath at 473K were calculated and analyzed.The results show that the ignition time of RDX by oil bath and air bath under the temperature of 473K are 151.7s and 3 372.6s,respectively,showing that under the same temperature and explosive,the thermal ignition delay time under oil bath heating was far less than that under air bath heating.As air bath heating,the ignition delay time increases with the decrease of the emissivity under the same temperature and explosive.The ignition delay time of RDX,HMX and TATB increase by 180.1 ％,168.9 ％ and 169.3 ％ respectively when the emissivity decreases from 0.9 to 0.1.The thermal ignition delay time increases with the decreases of the convective heat transfer coefficient under the same temperature and the same emissivity.关键词
一维热爆炸/空气浴/油浴/辐射率/热点火延滞时间Key words
one-dimensional time-to-explosion/air bath/oil bath/emissivity/thermal ignition delay time分类
军事科技引用本文复制引用
吴松,陈均,李明海..一维热爆炸试验传热的数值模拟[J].火炸药学报,2017,40(5):39-44,6.
