AP和Al含量对DNTF基炸药燃烧转爆轰的影响

Effect of Content of AP and Al on the Deflagration to Detonation Transition of DNTF-based Explosives

为了研究配方组分对二硝基呋咱基氧化呋咱(DNTF)基复合炸药燃烧转爆轰性能的影响,设计了AP和Al粉摩尔比分别为0.306、0.414、0.574的三种配方。采用同轴电离探针测试技术,对这三种DNTF基复合炸药配方进行了燃烧转爆轰性能试验。从燃烧转爆轰过程中波阵面传播速度及诱导爆轰距离的变化分析了AP和Al粉摩尔比对炸药燃烧转爆轰的影响。结果表明,随着炸药配方中AP和Al摩尔比从0.306增大到0.574,炸药初始燃烧持续时间从1065μs增大1395μs,燃烧速度从141 m·s^(-1)减小到108 m·s^(-1),但对流燃烧段和爆燃段持续时间快速减小,对流燃烧速度从500 m·s^(-1)增加到1668 m·s^(-1),爆燃速度从3000 m·s^(-1)增加到4800 m·s^(-1),发生燃烧转爆轰的诱导爆轰距离从675 mm左右减小到425 mm左右。

To study the effects of ingredients in formulation on the performance of deflagration to detonation transition（DDT） for dinitrofurazanfuroxan（DNTF） based explosives, three kinds of formulations that the molar ratio of AP and Al powders is 0.306,0.414 and 0.574, were designed. The performance test of DDT for three kinds of DNTF-based composite explosive formulations was carried out by the coaxial ionization probe test technology. The influence of molar ratio of AP and Al powders on the deflagration to detonation transition of explosive was analyzed by change of wave front velocity and inducement detonation distance. Results show that with increasing the molar ratio of AP and Al from 0.306 to 0.574, the initial burn duration time increases from 1065 μs to 1395 μs, and the burning rate decreases from 141 m·s-1 to 108 m·s-1, but the duration time of convection combustion section and deflagration section decreases rapidly, and the convection burning rate increases from 500 m·s-1 to 1668 m·s-1, and deflagration velocity increases from 3000 m·s-1 to 4800 m·s-1, the inducing detonation distance occurring DDT decreases from about 675 mm to 425 mm.