フラクタル性を考慮した沿面ストリーマ進展のシミュレーション

概要

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In this paper, the structural characteristics of the streamer corona on the insulation surface are investigated both in experiment and simulation, concerning the extension length and the fractal characteristics of the patterns. As for the simulation, a random growth model is developed to simulate the structure of surface streamer corona in air. The model accounts for both the distortion of the electric field caused by the streamers during their propagation and the field controlled random nature of the streamer propagation process. After the comparison between experimental and simulated results, the following facts are made clear. (1) The experimentally obtained Lichtenberg figure of the positive streamer corona in atmospheric presser shows the fractal characteristics and the dimensions of which are between 1.5 to 1.85. (2) The simulated streamer structure shows branched patterns as seen in the real discharges. The special extension length and the fractal dimension of the structure agree well with the experimental results. (3) The value of the electric field along the streamer, Est, is found to be in the range of 3.5-4.0 kV/cm and the value of critical electric field for the streamer to extend, Ecr, is about 5.1 kV/cm.
日本シミュレーション学会の論文
1992-06-15