粉尘气体中的球激波

THE PROPAGATION OF SPHERICAL SHOCK WAVES IN DUSTY GAS

取稀颗粒群下气固两相耦合的双流体简化模型，采用高解ＧＲＰ方法和全二阶精度的ＭａｃＣｏｒｍａｃｋ格式，数值模拟了球形激波在隋性粉尘气体四种不同初始分布下的传播，得到较纯气体下波后流场更加复杂的变化特性及精度高、无数值振荡、间断解锐利的流场结构。

For this paper, based on two phase flow model of dilute partical suspension in a gas,the GRP scheme of finite difference method with high resolution and the second order Mac Cor mack sche me are applied to the numerical analysis of the propagatfon of spherical shock waves in dusty gas for four kinds of initial states. The results indicate that the propagating process of spherical shock waves and the flow field developed behind it possess more complicated properties as compared with that in a pure gas. The results showed that the numerical method applied in this paper can get resolution with high accuracy,nonoscillation and sharp discontinuity.