磁驱动等熵压缩实验构形的磁流体力学计算模拟

在一维弹塑性反应流体力学拉格朗日编码SSS 的基础上扩充编制成功的一维磁流体力学计算编码SSS/MHD，可以计算模拟磁驱动等熵压缩（ICE） 实验中多介质、多空腔的不同厚度平行样品构形（台阶靶） 运动，并且把磁流体计算与模拟脉冲功率驱动源的集中参数外电路方程组直接耦合，不依赖于实验当时测量的驱动电流（电压） 数据，直接根据原始数据对实验样品的力学和电磁学运动过程和各种参数剖面进行数值模拟. 介绍了对于纯铝、钽和塑料粘结炸药等3 种性能不同材料的台阶靶样品ICE 实验的计算模拟，得到了与激光速度干涉测量的不同厚度样品后自由面（或光学窗口界面） 速度历史十分符合的结果，对于实验结果的分析和实验设计的改进具有重要意义. 旨在为磁驱动实验系统的校核、设计和实验构形改进提供有一定预测能力、功能比较完善的计算模拟研究手段. 

MAGNETO-HYDRODYNAMICS MODELING OF CONFIGURATIONS IN MAGNETICALLY DRIVEN ISENTROPIC COMPRESSION EXPERIMENTS

Based on the one-dimensional elastic-plastic reactive hydrodynamic code SSS, the one-dimensional magneto-hydynamics code SSS/MHD is developed successfully, which couples magneto-hydynamics calculation with centralized parameter circuit equations of simulative pulsed power source directly, and numerically simulates mechanical and electromagnetic kinetic processes and some kinds of parameter sections of samples according to original datum independent of real time experience circuit. The code SSS/MHD can simulate different thickness parallel configurations (sidestep target) with multi-medium and multi-cavities in magnetically driven isentropic compression experiments. The calculation of sidestep targets on aluminum, tantalum and plastic binder explosive in ICE experiments is described in this paper, and the velocity histories of samples free surface or optics window interface accord with experiment results tested by laser interference. It is important for magneto-hydrodynamics calculation to analyze the test results and improve the design. The purpose of this paper is to provide a simulation means with a certain extent prophecy and more perfect function for correcting and designing magnetically driven system and improving experiment configuration.