Numerical Analysis on Physical Quantities of Aluminum in Magnetically Driven Isentropic Compression Experiments
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摘要: 根据一维磁流体力学计算程序SSS/MHD的控制方程组，建立了磁驱动准等熵压缩台阶铝的计算模型，并对铝中的物理量变化过程进行了数值计算。在计算得到的电流和样品后界面粒子速度历程与实验测试结果相符合的基础上，分析了负载构型(样品)的动态电感变化、磁扩散规律，以及温度、密度、压力和速度等物理量的分布和变化规律。研究结果对深入认识磁驱动准等熵压缩物理过程和改进实验设计具有重要意义。Abstract: The equation groups of one dimensional magnetohydrodynamics code SSS/MHD are given, and a calculation model of magnetically driven isentropic compression on a side-step aluminum sample is established.Based on the calculated values of current and particle velocity at the back interface of sample, according to the ones obtained by the experiment, the change of dynamic inductance of the configuration (sample), the law of magnetic field diffusion, and the distributions of temperature, density, pressure and particle velocity in sample are analyzed, which are important to deeply understand the physical process and improve the experimental design.
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图 2 磁驱动准等熵压缩铝样品的计算模型
Figure 2. Calculated model of magnetically driven isentropic compression on aluminum sample
图 6 铝样品自由面粒子速度历程的计算结果与实验结果对比
Figure 6. Comparison of experimental and calculated free-surface particle velocities of the aluminium sample
图 8 不同位置处磁感应强度的变化
Figure 8. Variations of the magnetic induction at different locations
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