摘要
建立二维无粘磁流体动力学模型,考察电磁导轨炮等离子体电枢工作过程中电场、磁场、流场的耦合作用。推导了适用于耦合求解N-S方程与麦克斯韦方程的CE/SE方法,计算格式简单,具有较高的精度与稳定性。通过数值计算考察了电枢内部各物理量的分布。计算结果表明:洛仑兹力是电枢等离子体流推动弹丸运动的主要作用力;电枢头部压强、电流密度较高,温度分布符合辐射传热的规律;由于对流,电枢内部流动复杂,有速度漩涡出现。计算结果对等离子体电枢MHD问题的理论和实验研究有重要的指导作用。
A two-dimensional inviscid magnetohydrodynamics （MHD） model is developed to investigate the interaction among the electric fields, magnetic fields and flow fields. The space-time conservation element and solution element （CE/SE） method is devised for solving the coupling Navier-Stokes equations and Maxwell equations, which has the advantages of simple algorithm, high precision and good stability. The distributions of physical parameters of the plasma may thus be evaluated. The results show that the Lorentz force is the main propulsion; high pressure and current density can be observed ahead of the projectile, and the distribution of temperature is in good agreement with the results predicted by the law of radiative heat transfer; due to convection, the internal flow is complex, and circulation patterns of velocity are evident. All the results help to the theoretical and experimental studies about the MHD problem of the plasma armature.
出处
《工程力学》
EI
CSCD
北大核心
2009年第10期240-244,251,共6页
Engineering Mechanics
