Evolution of electrical discharge channel in isopropyl alcohol solution

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Panov, V.A.^1 ; Vasilyak, L.M.^1 ; Pecherkin, V.Ya.^1 ; Vetchinin, S.P.^1 ; Kulikov, Yu.M.^1 ; Son, E.E.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Anode electrodes;    Electrical discharges;    High-voltage pulse generator;    Isopropyl alcohols;    Propagation velocities;    Spark channels;    Spark discharge;    Thermal process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012157/pdf
DOI  :  10.1088/1742-6596/653/1/012157

来源: IOP

【 摘 要 】

Evolution of the spark channel created by the high voltage pulse generator in 15% isopropyl alcohol solution in tap water was investigated experimentally. Fast camera images show the start of spark discharge channel with the anode region glowing, which is due to ionization-overheating instability near the surface of anode electrode. Measured propagation velocity is about 4 m/s and points to thermal process of channel evolution. Partial discharges in gas bubbles near the spark channel were observed. When the channel bridges the gap the cathode flash of lightning occurs which is much brighter than anode glowing and channel one. After destruction of the spark channel the cathode glowing stays for a longer period than anode one.