剩余弧柱等离子体与热边界区对介质恢复过程的影响

Influences of Post-Arc Residual Arc Column Plasma AndThermal Boundary Region on Dielectric Strength Recovery Process

为了揭示零后介质强度恢复过程中的复杂物理现象，建立了喷口电弧磁流体动力（ＭＨＤ）数学模型，强调了电弧、气流、电磁场三者的相互作用，并通过操作机构与灭弧室的联合模拟计算，反映了电弧熄灭这一动态过程，详细研究了零后剩余弧柱等离子体的蜕变和热边界区对介质恢复过程的影响。

In order to receal the complex phenomena during the recovering procession of dielectric strength af-ter current past zero, a magnetohydrodynamic(MHD) mathematical mdoel of nozzle arc is established,which emphasizes the interactions of the arc,the gas flow and the electromgnetic field,By employingthe scheme of combining calculations of mechanical characteristics and arc chamber's characteristics,thedynamic development of arc-quenching is reflected.Influences of the post-zero residual arc columnplasma and thermal boundary region on the recovery proceeding of dielectric strength are studied