【摘要】 对爆炸冲击波绕流问题采用可压缩流体模型建立了质量、动量和能量的偏微分守恒方程组,基于多物质流体Euler型算法,采用算子分裂格式,运用体积份额法处理多介质界面,用自行开发的三维数值模拟程序MMIC3D模拟计算了三维空中爆炸的爆源附近和爆炸场中冲击波流场的发展规律,研究了挡墙拐角处绕流的形成和变化情况,分析比较了挡墙的位置、形状对挡墙后爆炸冲击波的影响,并与经验公式进行了比较研究.数值计算基本符合物理规律,说明文中采用的模型和算法是合理的,为工程设计减压设施提供了数值计算依据.更多还原

【Abstract】 The partial differential conservation equations for mass,momentum and energy are applied by adopting the compressible fluid model for the explosion flow field.Based on the Eulerian algorithm of multi-material in cell(MMIC),the operator splitting scheme is used,and the moving interface is treated by volume ratio method.The development of the shock wave near the explosion source and in the explosion field caused by three-dimensional air explosion are simulated using three-dimensional numerical simulation code MMIC3D compiled by authors.The formation and change of the flow field around the corner wall are studied.Furthermore the effects of the explosion shock wave are analyzed and compared with the empirical formula because of different locations and different shapes of the protective wall.The simulation results turn out to be in full agreement with the principle of physics.It also indicates that the model and algorithm presented in this paper are proper, thus the numerical simulation can be used for engineering design of decompression facilities.更多还原