采用高分辨率数值方法重构与实测数据一致的实际爆炸波的部分流场

Reconstruction of Part of an Actual Blast-Wave Flow Field to Agree with Experimental Data by Using Numerical Method with High Identification

本文采用球面爆炸的活塞推进模型和对间断解具有高分辨率的二阶Godunov型有限差分方法,以两类化爆试验值作依据,通过恰当调整运动活塞边界条件,数值重构了实际半球形爆炸波的部分流场.方法简单、可靠,所得结果可用于评估任意同类型炸药一维爆炸波的远场效应。

In this paper, on the basis of experimental data of two kinds of chemical explo-. sions, the piston-pushing model of spherical blast-waves and the second-order Godunov-type scheme of finite difference methods with high identification to discontinuity are used to the numerical reconstruction of part of an actual hemispherical blast-waveflow field by properly adjusting the moving boundary conditions of a piston. This method is simple and reliable. It is suitable to the evaluation of effects of the blast-wave flow field away from the explosion center.