摘要
Abstract
Compared with the parallel-plate dielectric barrier discharge, surface dielectric barrier discharge （SDBD） can produce uniform plasma layer with a larger area, and it has also been mainly applied in such new technologies as the flow control, all of that have drawn a wide attention from the academia and the industry. In order to better research the discharge mechanism and the regularity of evolution of SDBD, we performed the two-dimensional numerical simulation of SDBD in the air with the plasma module of Comsol. In the process of air discharge, considering the chemical reaction of 8 kinds of particles, such as O2-, N2- , and 02＋ , and 16 discharge chemical reactions, we got the change process of particle concentration and the electric-field distribution in the discharge space. By analyzing and discussing the movement of electric charge in the initial phase, we find that, electron, mainly controlled by the electric field in the initial stage, will do drift motions, then its scope of distribution will be expanded which is affected by both diffusion and drift motions. Moreover, the asymmetry of discharge is analyzed and verified, and it is pointed out that the accumulation of charge on the surface leads to the asymmetry of discharge.关键词
沿面型介质阻挡放电/等离子体/数值模拟/流体模型/漂移扩散/化学反应Key words
surface dielectric barrier discharge/plasma/numerical simulation/fluid model/drift diffusion/chemicalreaction分类
数理科学
