Propagation of positive streamers on the surface of shallow as well as deep tap water in wide and narrow dielectric channels
Propagation of positive streamers on the surface of shallow as well as deep tap water in wide and narrow dielectric channels
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DOI：
10.1088/1361-6595/26/2/025004
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发表时间：
2016-12
影响因子：
3.8
通讯作者：
Y. Akishev;V. Karalnik;M. Medvedev;A. Petryakov;A. Shafikov;N. Trushkin
中科院分区：
文献类型：
--
作者：
Y. Akishev;V. Karalnik;M. Medvedev;A. Petryakov;A. Shafikov;N. Trushkin
研究了长寿命正流光在自来水表面传播的实验结果，等离子体形成气体为大气压下的空气。测量数据的强度的纵向电场在表面流光，流光速度与时间，直到它停止，和流光的长度与所施加的电压。结果表明，盆地中的水深影响拖缆长度：水深越深，拖缆越长。除此之外，限制可用于拖缆延伸的水中区域的横向方向抑制拖缆分支，直到其完全消失。结果表明，在狭窄的水道中传播的非分支流光的长度大大增加。将具有所需配置的长而窄的狭缝的电介质板放置在水面上使得能够控制流光传播的轨迹。对不同深度和宽度的水池中流注内外的电场和电流的空间结构进行了三维数值计算。数值结果表明，流光的长度和直径强烈影响周围空气中的电场的强度和空间结构。
The results of experiments studying long-living positive streamers propagating on the surface of tap water are presented; the plasma-forming gas is air at atmospheric pressure. Measurement data for the strength of the longitudinal electric field in the surface streamer, the streamer velocity versus time until it stops, and the length of the streamer versus the applied voltage are presented. It is revealed that the depth of the water in a basin influences the streamer length: the deeper the water, the longer the streamer. Besides this, restricting the transverse direction of the area in the water accessible for streamer extension suppresses streamer branching until it fully disappears. It is shown that non-branching streamers propagating in narrow water channels increase their length considerably. Placing a dielectric plate with long, narrow slits of the required configuration on the water enables one to control the trajectory of streamer propagation. Three-dimensional numerical calculations of the spatial structure of the electric field and the current inside and outside the streamer in the water basin with different depths and widths were made. It is shown numerically that the streamer length and its diameter strongly influence both the strength and spatial structure of the electric field in the air around the streamer.