Abstract：The characteristics of short gap streamer discharge at different stages in 10%~90% SF6/N2 gas mixtures are simulated using particle transport equation and coupled Poisson equation. The spatial distribution of particles in streamer head appears steep gradients. To improve the computing efficiency and reduce numerical diffusion, the non-uniform triangular element mesh method is introduced. The temporal discretization of particle continuity equation is solved by the Euler- Taylor-Galerkin scheme (ETG) discrete, while the discrete equations are solved by the flux corrected transport (FCT) method. In the process of simulation, ionization, recombination, attachment and photoionization are considered in SF6/N2 mixed gas. The electric field intensity between anode plate and cathode plate changes a lot with the electric field distortion by space charge distribution as streamer propagation. The initial condition of streamer discharge of short gap breaks down. The electron concentration of the streamer head is about 1020/m3, and the electric field value in the streamer head is about 114kV/cm. The results show that the photoionization has great influence on streamer formation and propagation, and prove that the ETG-FCT method is valid
汪沨, 李敏, 李锰, 皮建民, 许松枝, 黄墀志. 基于ETG-通量校正传输法的短间隙SF6/N2混合气体流注放电数值仿真[J]. 电工技术学报, 2016, 31(6): 234-241.
Wang Feng, Li Min, Li Meng, Pi Jianmin, Xu Songzhi, Huang Chizhi. Numerical Simulation of Short Gap Streamer Discharge in SF6/N2 Gas Mixtures Based on Euler-Taylor-Galerkin-Flux Corrected Transport Method. Transactions of China Electrotechnical Society, 2016, 31(6): 234-241.
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