火炸药学报2018，Vol.41Issue(2)：159-164,6.DOI:10.14077/j.issn.1007-7812.2018.02.010
DNAN基熔铸混合炸药慢烤燃的尺寸效应
Study on the Size Effect of Cook-off of DNAN Based Melting and Casting Mixed Explosive
摘要
Abstract
The slow cook of three kinds of DANA-based melting and casting mixed explosives with different charge sizes was carried out by the self-designed cook-off test device at a heating rate of 1.0 ℃ /min and using multi point temperature measuring method.On the basis of this,the calculation model of cook-off bomb was established.The numerical simulation of the cook-off bomb with different charge size was carried out by using FLIENT software. The effect of charge size on the cook-off response characteristics of DNAN-based melting and casting explosive was studied.The results show that the charge size has a significant effect on the response temperature of DNAN-based meltinf and casting mixed explosives when the constraining conditions and the heating rate do not change.For a cook-off bomb with a diameter of 19 mm,at a heating rate of 1.0 ℃ /min,when the length-to-diameter ratio is less than 4,the response temperature of the explosive decreases exponentially with increasing the ratio of length-to-diam-eter and the response time decreases exponentially with increasing the size of the charge.When the length-to-diame-ter ratio is greater than 4,the response temperature of the explosive tends to be constant,and the response time is basically unchanged.When the heating rate is constant,the phase transition temperature of DNAN based melting and casting explosives is independent of the size.At a heating rate of 1.0 ℃ /min,the ignition location of the explo-sives is all in the center of the grain,and the ignition area is geometrically similar to the charge size.关键词
2,4-二硝基苯甲醚/DNAN基熔铸炸药/尺寸效应/烤燃试验/相变/烤燃弹Key words
2,4-dinitrophenyl ether/DNAN based melting and casting explosive/size effect/cook-off test/phase change/cook-off bomb分类
军事科技引用本文复制引用
赵亮,智小琦,高峰,范兴华,曾稼..DNAN基熔铸混合炸药慢烤燃的尺寸效应[J].火炸药学报,2018,41(2):159-164,6.基金项目
国家安全重大基础研究项目 （）
