论文标题
负面放电的计算研究：表面流媒体和表面电荷的特征
A Computational Study of Negative Surface Discharges: Characteristics of Surface Streamers and Surface Charges
论文作者
论文摘要
我们通过使用2D流体模型的数值模拟研究了空气中负面排放的动力学。使用了由平行板电极之间嵌入的扁平介电组成的几何形状。与散装气体中的负流媒体相比，观察到负面流室的电子密度较高，电场较高和较高的传播速度。另一方面，它们的最大电场和速度低于正面彩流器。在我们的模拟中，负面流流剂对于较大的相对介电常数的速度较慢。当负电流沿介电表面繁殖时，负电荷会积聚在介电表面上，这可能导致介电内部的高电场。如果我们最初在介电上加了负面电荷，则负表面放电的生长会延迟或抑制。正表电荷具有相反的效果。
We investigate the dynamics of negative surface discharges in air through numerical simulations with a 2D fluid model. A geometry consisting of a flat dielectric embedded between parallel-plate electrodes is used. Compared to negative streamers in bulk gas, negative surface streamers are observed to have a higher electron density, a higher electric field and higher propagation velocity. On the other hand, their maximum electric field and velocity are lower than for positive surface streamers. In our simulations, negative surface streamers are slower for larger relative permittivity. Negative charge accumulates on a dielectric surface when a negative streamer propagates along it, which can lead to a high electric field inside the dielectric. If we initially put negative surface charge on the dielectric, the growth of negative surface discharges is delayed or inhibited. Positive surface charge has the opposite effect.
