【摘要】 建立了电磁驱动平面飞片的一维磁流体力学模型,考虑了焦耳加热的影响,并对Sandia实验室Z装置上开展的一个实验进行了模拟计算,与实验结果的比较表明,计算给出的样品自由面速度历史曲线与实验VISAR测量的结果基本一致。还分析了焦耳加热对飞片的烧蚀情况,并分析了磁场穿透深度,给出了不同厚度飞片自由面的速度历史曲线。更多还原

【Abstract】 A one-dimensional,magnetohydrodynamic model,in which the Ohmic heating is considered,was proposed to numerically calculate the experiment Z-452 carried out on the Z machine at Sandia National Laboratories.The computed free-surface velocities of the flyer plates agree well with the experimental records by VISAR.The paper also analyzes the ablation induced by the Ohmic heating in the flyer plates and the penetration of magnetic field.The obtained velocity,pressure history curves are helpful to understand the physical mechanism of magnetically accelerated plane flyers.更多还原