螺旋型爆磁压缩脉冲发生器2维磁流体力学数值模拟

Numerical calculation of two-dimensional magnetohydrodynamics code for helical magnetic flux compression generator

基于任意拉氏-欧拉方法的2维磁流体力学程序APMFCG被用于简单绕制的螺旋型爆磁压缩脉冲发生器动力学过程的模拟,给出了德克萨斯技术大学简单绕制的爆磁压缩发生器数值计算结果,输出电流和线圈电感的模拟结果与实验测量基本吻合。该程序也用于研究由于种子电流的不同所导致的欧姆电阻非线性效应对爆磁压缩过程的影响,实验结果证明了该程序计算的可靠性。

A two-dimensional magnetohydrodynamics arbitrary Lagrangian Eulerian（MHD ALE） code, named APMFCG, is used to simulate the dynamic behavior of helical magnetic flux compression generators（MFCG）. APMFCG solves the coupled equations of electromagnetics and mechanics in the region of explosive, metal armature and coil, air or filled insulation gas in the generator. A circuit equation couples the electromagnetic fields in the generator to the external load. In this paper, the basic physical model and the main equations are introduced. APMFCG is used to simulate the series of experimental results of a simply wound helical MFCG device developed in Texas Technology University. The agreement of output current and inductance of coil between the experimental and the numerical results is quite satisfactory. The code is also used to study the effects of the nonlinear impedance loss on MFCG performance due to the difference of the seed current.