挡墙形状对二维爆炸场影响的数值模拟研究

研究二维爆炸场中挡墙的形状对冲击波传播的影响 .在整个模拟过程中不考虑外力、外源和热交换的影响 ,采用流体网格得到了可压缩流体的偏微分守恒方程 ;并且通过使用多流体网格方法及运用“和”分裂格式完成了输运步的计算 ;同时对于爆轰产物采用了JWL状态方程 ,并将空气简化成理想气体 .最终获得了挡墙的两侧边缘的形状对冲击波传播影响的具体情况 ,并列出了二者之间的关系 .可以看出靠近爆源一侧的挡墙形状对冲击波传播的影响更明显 .

Numerical Simulation of the 2-D Explosive Field for the Effect of Protective Wall's Shape

The effect of the protective wall's shape on the shock wave of2-D explosive field is studied. Under the condition that the outside force, the outside resources and the heat exchange are ignored, the partial differential conservation equations of the compressible fluid are given by adopting the fluid model. The “and” splitting scheme to calculate the transport step by using the multi-material in cell(MMIC) method is adopted. At the same time, for the detonation products, the JWL state equation is adopted, and the air is approximately regarded as the ideal gas. Accordingly the effects of the shapes of the protective wall's both sides on the shock wave are obtained, and the relations between them are listed in the paper. So it can be obtained that the shape of the edge near to the explosive center of the protective wall affects the shock wave more obviously.