TNT炸药和乳化炸药驱动飞板的通用状态方程特征线法研究

Characteristic Curve Method for Movement of Flyer Driven by TNT and Emulsion Explosives with General Equation of State

在爆炸气体动力学的基础上,利用特征线差分法,对飞板的运动规律进行研究。差分过程中,基于稳定爆轰的基本假设,根据二维定常流理论,推导了通用状态方程的特征线相容关系。利用爆轰气体密度取代特征线相容关系中的马赫数,导出了与物质物态无关的通用状态方程特征线法,编写了爆轰产物作用下飞板内部和边界的差分计算程序。利用该程序计算了飞板在TNT炸药和乳化炸药爆轰作用下的运动参数,研究了在不同质量比下TNT炸药和乳化炸药爆轰驱动飞板的抛掷姿态曲线,并与Richter公式计算结果进行了对比研究。

On the basis of explosion gas dynamics,the movement of flyer plate is studied using characteristic curve difference method in this paper.In the process of difference,the basic assumption of steady detonation is used to study the law of flyer plate movement.According to the theory of two-dimensional steady flow,the compatibility relationship of characteristic curves is derived which belongs to general equation of state,with Mach number taking the place of the density of detonation gas.The movement parameters of flyer plate accelerated by TNT and emulsion explosives are calculated by the difference programs of characteristic curve.In addition,the flying postures of flyer plates driven by the two kinds of explosives at different mass ratio are also analyzed and compared with the calculated results by Ritchter＇s formula in terms of its accuracy.