Effect of Profiled Surface on Streamer Propagation and the Corner Effect
Effect of Profiled Surface on Streamer Propagation and the Corner Effect
复制标题
异形表面对流光传播的影响及角点效应
DOI：
10.1109/tdei.2021.009866
复制
发表时间：
2021
影响因子：
3.1
通讯作者：
Lipeng Zhong
中科院分区：
文献类型：
--
作者：
Feng Wang;Lanbo Wang;She Chen;Qiuqin Sun;Lipeng Zhong
介质表面附近的拖缆行为是气-固电绝缘系统的重要特性。本文对正流光沿不同粗糙度和形状的介质表面在环境空气中的传播进行了数值研究。每个表面都设计成具有不同的粗糙度，但具有相同的流光传播长度，以排除拉长的轮廓表面对流光的影响。从而可以分析影响波光在异形介质表面上传播的其他因素。当流光传播到凹凸表面的角落时，流光半径增大，流光前电场减小。这种现象被称为角效应。随着粗糙度的增加，流线半径变大，流线前方的电场在转角处变小。同时，粗糙度的增加抑制了流光的发展。此外，还发现流线在斜坡上下降时加速，上升时减速。当流光在具有凸性的介质表面上传播时，流光的发展也受到阻碍。但弯角处流线半径和电场的变化趋势与凹面处不同。
Streamer behavior near dielectric surfaces is an important characteristic of gas-solid electrical insulation systems. This paper presents the numerical study on the propagation of positive streamers along dielectric surface with different roughness and shape in ambient air. Each surface is designed to have different roughness but the same streamer propagation length to exclude the effect of elongated profiled surface on the streamer. So other factors that involved in streamer propagation on profiled dielectric surface could be analyzed. When streamers propagate to the corner on a surface with concaves, the radius of streamer increases and the electric field in front of the streamer decreases. The phenomenon is called corner effect. With the increase of roughness, the radius of the streamer becomes larger and the electric field in front of the streamer becomes smaller at the corner. Meanwhile, the increase of the roughness results in an inhibition on the streamer development. Moreover, it is found that the streamer accelerates when it descends on the slope and decelerates when ascending. When the streamer propagates on a dielectric surface with convexities, the streamer development is also impeded. However, the variations of streamer radius and electric field at the corner show different trend as that in a concave.