Two-dimensional magneto-hydrodynamic simulations of magnetically accelerated flyer plates
-
摘要: 针对磁驱动高速飞片发射技术,建立了磁驱动飞片的二维磁流体力学数学模型,并考虑了焦耳热对飞片的影响。在四边形网格的基础上,采用算子分裂法,把磁流体力学方程依次分成热扩散、磁扩散、理想流体力学三个物理过程进行求解,研制了磁驱动飞片二维磁流体力学数值模拟程序。对美国Sandia国家实验室Z装置上的一个磁驱动飞片发射实验进行了数值模拟,并分析了不同时刻焦耳加热对飞片的烧蚀情况,计算得到的飞片自由面速度曲线与实验激光速度干涉仪测量的结果相吻合。Abstract: A two-dimensional magneto-hydrodynamic model is solved numerically by a time-split algorithm. The physical processes which are time-split are thermal and equilibrium radiation diffusion, resistive diffusion, and Lagrangian hydrodynamics. A magneto-hydrodynamic model is proposed to numerically calculate the experiment 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 velocity interferometry system for any reflector (VISAR). The obtained velocity, pressure history curves are helpful to understand the physical mechanism of magnetically accelerated plane flyers.
点击查看大图
计量
- 文章访问数: 1331
- HTML全文浏览量: 211
- PDF下载量: 394
- 被引次数: 0