Branching characteristics of positive streamers in nitrogen-oxygen gas mixtures
Branching characteristics of positive streamers in nitrogen-oxygen gas mixtures
复制标题
氮氧混合气体中正流光的支化特性
DOI：
10.1109/tdei.2018.007043
复制
发表时间：
2018-06
影响因子：
3.1
通讯作者：
Zeng Rong
中科院分区：
文献类型：
--
作者：
Chen She;Wang Feng;Sun Qiuqin;Zeng Rong
拖缆最重要的特征之一是它们在开发过程中频繁地分支。本文对氮氧混合气体中正流光的分支特性进行了实验研究。将具有10-20 kV幅度的脉冲电压施加到点-平面间隙。气体压力为100毫巴，氧气浓度为0.01和20%。得到了分支前后的分支角、流光通道截面积以及流光分支长宽比。发现氧浓度为0.01%时的流光分支角小于氧浓度为20%时的流光分支角。分支后的流注横截面积与分支前的流注横截面积的平均比值为0.711，并且对于不同的氧浓度略有变化。当氧含量从20%降低到0.01%时，分支比从12.6±2.6显著降低到6.7±1.5，这表明在一定距离处流光分支更频繁。由于氮氧比直接决定电子生产率由流光前面的光电离，结果意味着流光分支的可能性可能与流光尖端的光电离率。
One of the most important feature of streamers is that they frequently branch during the development process. In this paper, the branching characteristics of positive streamers are experimentally investigated in nitrogen-oxygen gas mixtures. Pulsed voltages with the amplitude of 10–20 kV are applied to a point-plane gap. The gas pressure is 100 mbar and the concentrations of the oxygen are 0.01 and 20%. The branch angle, the cross-sectional area of streamer channels before and after branching, as well as the ratio between streamer branching length and width are obtained. It is found that the streamer branching angle for 0.01% oxygen is less than that for 20% oxygen. The average ratio of the streamer cross-section area after branching to that before branching is 0.711 and changes slightly for different oxygen concentrations. The branching ratio decreases significantly from 12.6±2.6 to 6.7±1.5 when lowering the oxygen content from 20% to 0.01%, which indicates that the streamers branch more frequently at a certain distance. Since the nitrogen-oxygen ratio directly decides the electron production rate by photoionization ahead of streamers, the results imply that the possibility of streamer branching may correlate with the photoionization rate in the streamer tip.
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DOI：
10.1103/physreve.84.046411
发表时间：
2011-02
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
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通讯作者：
A. Luque;U. Ebert
影响因子：
1.5
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M. Laroussi;Wayne Hynes;T. Akan;Xinpei Lu;C. Tendero
DOI：
10.1103/physreve.71.016407
发表时间：
2005-01
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
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作者：
Sergey Pancheshnyi;M. Nudnova;A. Starikovskii
通讯作者：
Sergey Pancheshnyi;M. Nudnova;A. Starikovskii
DOI：
10.1016/j.ijheatmasstransfer.2012.10.015
发表时间：
2013-01
影响因子：
5.2
作者：
I. Chen;M. Guo;Kai-Shing Yang;Chi-Chuan Wang
通讯作者：
I. Chen;M. Guo;Kai-Shing Yang;Chi-Chuan Wang
影响因子：
1.8
作者：
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通讯作者：
E. Moreau;L. Léger;G. Touchard