摘要
应用二种截然不同的炸药PBX 95 0 1和T2 ,计算了爆轰波在不同入射角下与金属平板的斜相互作用。在正规反射区 ,计算结果与激波极线理论基本一致 ;应用燃烧模型 ,分别计算了Fe球壳装药JB90 0 3(HE)及JB90 14 (IHE)散心爆轰波的绕射传播 ,计算结果与实验很好地符合。在非正规反射区 ,二维拉氏程序计算结果明显地不同于经典理论结果 ,计算中没有出现Mach反射。计算结果显示 ,毗邻介质影响节点附近的爆轰波阵面形状及爆轰波速度 ;
Oblique Interactions of detonation waves with explosives/metal interface are simulated at different incidence angels. Two heterogeneous high explosives are used (PBX-9501 and T2). Results show good agreement between numerical and shock-polar theory in the regular reflection zone. Better results are obtained with δ burn model to calculate this diffractions of divergent detonations of Fe spherical shells, Both JB9003 (IHE) and JB9014 (HE), the calculation results are very close to the experimental results. Outside the regular reflection zone a large discrepancy appears with the results provided by hydrodynamic theory as well as those obtained with Lagrangian 2D-code, there is no Mach reflection in calculation. These are tentatively explained from ZND model. The numerical results show that the adjacent medium affects the velocity and the shape of the detonation front nearby the node. The different image nearby the node is obtained with different reactive rate. An effort should be made to describe the effect of precursor wave (weak shock) on the explosives.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2002年第3期203-209,共7页
Explosion and Shock Waves
基金
国家自然科学基金项目 (19872 0 14 )
中国工程物理研究院科学技术基金项目 (980 10 9)
计算物理国防科技重点实验室基金项目 (JS76ZW0 90 7)
关键词
斜相互作用
反应率
正规反射
Mach反射
Computer simulation
Equations of state
Flow interactions
Pressure distribution
