Impacts of space and surface memory effects on streamer dynamics and flashover characteristics under repetitive submicrosecond pulses in nitrogen

Zheng Zhao, Chenjie Li, Zongze Huang, K. Xu, Jiangtao Li
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Abstract

Decrease in surface insulation capability under repetitive pulses significantly hinder the further enhancement of discharge physics effects, however, fundamental mechanisms of surface flashover under repetitive pulses remain unclear. Developing characteristics of surface streamer and influential mechanisms of memory effects under repetitive submicrosecond pulses were investigated. Both the inception moment and the propagation velocity of subsequent positive surface streamers decrease with increasing the pulse repetition frequency. Enveloping curves of the number of pulses before flashover are similar to the gas gap breakdown. Impacts of space and surface memory effects on the inception and propagation of surface streamers are discussed for repetitive submicrosecond pulses and high-pressure nitrogen.
空间和表面记忆效应对重复亚微秒脉冲氮流动力学和闪络特性的影响
重复脉冲作用下表面绝缘性能的下降严重阻碍了放电物理效应的进一步增强,但重复脉冲作用下表面闪络的基本机理尚不清楚。研究了重复亚微秒脉冲作用下表面流光的发展特征及其影响记忆效应的机制。随着脉冲重复频率的增加,后续表面正流的起始矩和传播速度均减小。闪络前脉冲数包络曲线与气隙击穿相似。讨论了空间记忆效应和表面记忆效应对重复亚微秒脉冲和高压氮气条件下表面流的产生和传播的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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