悬浮RDX炸药和铝颗粒混合粉尘爆轰的数值模拟  

Numerical simulation of detonation in suspended mixed RDX and aluminum dust

作　　者：洪滔[1] 秦承森[1] 林文洲[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《爆炸与冲击》2009年第5期468-473,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10672025)

摘　　要：采用两相流方法对炸药颗粒直径为20.0μm时与铝颗粒混合物的爆轰波的发展与传播过程及爆轰波参数进行了数值计算。结果表明,在炸药粉尘中加入铝颗粒,可以大大提高爆轰波参数。当铝颗粒直径为3.4μm时,尽管铝颗粒的直径较炸药颗粒直径小,但由于炸药颗粒的点火温度低,二者的点火时间相差不多。如果铝颗粒的直径为7.0μm,由于铝颗粒的点火滞后于炸药颗粒的点火,混合颗粒粉尘中可能形成双波阵面的爆轰波。Detonation in suspended mixed RDX and aluminum particles in air was numerically simulated with the two-phase flow model.Formation and propagation of detonation was examined and the parameters of detonation were obtained.In calculation the diameter of RDX particle is 20.0 μm.Numerical results show that aluminum particles added in high explosive dust can enhance the parameters of detonation waves.As the diameter of aluminum particles is 3.4 μm,the ignition distances of two kinds particles are almost the same.As the diameter of aluminum particle is 7.0 μm,the ignition distance of aluminum particles is much longer than that of high explosive particles,and a double front detonation can occur in the suspended mixed RDX and aluminum dust.

关 键 词：爆炸力学 两相爆轰 两相流 RDX粉尘 铝粉尘 

分 类 号：O381[理学—流体力学]