论文部分内容阅读
激光驱动准等熵压缩实验上尚不能直接测量获得样品前表面压力,普遍采用的方法是通过VISAR干涉仪诊断样品后表面条纹移动,根据条纹移动数计算出样品后表面粒子速度随时间变化曲线,进而利用流场反演获得样品前表面压力随时间变化曲线。本文编写了激光实现准等熵压缩流场反演方法的代码,用于计算样品前表面压缩过程中压力随时间的变化。流场反演方法的基本方程为拉格朗日质量守恒方程,动量守恒方程以及材料的状态方程。给出
Laser-driven quasi-isentropic compression experiment can not directly measure the surface pressure of the sample, the commonly used method is to use the VISAR interferometer to diagnose the surface of the sample after the fringes move, calculate the particle surface velocity of the sample after the fringe movement with time curve, Furthermore, the curve of the pressure on the front surface of the sample with time is obtained by using the flow field inversion. In this paper, a code for the laser inversion of quasi-isentropic-compressed flowfields has been written to calculate the change of pressure over time during compression of the front surface of the sample. The basic equations of the flow field inversion method are Lagrange’s mass conservation equation, momentum conservation equation and the material’s state equation. Given