FAE爆炸波对地面目标作用的三维数值研究

3D Numerical Simulations on the Interaction between FAE Blast Waves and Ground Targets

利用二阶迎风TVD格式 ,对多组分全N S方程进行全耦合数值求解 ,研究了近地空中环氧丙烷 (C3H6 O)形成的圆柱形云雾爆炸波和地面作用问题 ,得到了对目标作用前、后冲击波的传播和波系结构的演化以及不同时刻爆源组分的分布。对目标表面计算单元的压力进行面积加权平均 ,得到目标各表面平均超压随时间变化的曲线。压力值的动画显示表明了目标表面所受载荷的大小和分布随时间变化的规律。修改初、边值条件 。

The Second order upwind TVD scheme was used to solve the three dimensional complete Navier Stokes equations coupled with multi species equations.The interactions between FAE blast waves and ground targets were simulated using the above method.The numerical results clearly show blast wave propagation,the evolution of shock structures and distributions of exhaust multi species.The weighted pressure time history in each element was used to deduce the average overpressure variation on target surface.The animated slides of the computed pressure show the loading distribution at different time.The approach and software developed in this paper can be used to predict the interactions between groud targets and blast waves generated by FAE in arbitrary shapes.