中文摘要：

使用流体连续方程对SF6／N2混合气体放电过程进行建模，并采用通量校正传输法（Flux—Corrected Transport，FCT）首次实现了低SF6含量的SF6／N2二维流体模型的求解。结果表明，SF6／N2放电过程可分为电子崩和流注两个阶段；正负电荷分离后使得间隙电场发生了畸变，并导致等离子体更快地向两极发展；光电离对负流注的形成与发展造成了很大的影响。

英文摘要：

An SF6/N2 discharge model was established by using fluid continuity equation. And a two dimensional fluid model for SF6/N2 with low contents of SF6 gas mixture was solved by using the flux-corrected transport method. The simulation shows that the discharge process of SF6/N2 has two steps： electron avalanche process and streamer process. After the separation of the positive and negative space charge, the electrical strength in the gas gap is enhanced, and this makes the plasma move faster to the electrodes. Photo-ionization affects the formation and propagation of negative streamers greatly.