Effect of Electrode Polarity on the Development of the Breakdown in Conductive Water with Air Microbubbles

— The effect of electrode polarity in the pin-to-rod geometry on the development of pulsed electric discharge in water with specific electrical conductivity of (90 ± 10) µS/cm with and without air microbubbles was experimentally studied. It was found that the initiation of the plasma channel at the...

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Bibliographic Details
Published in:Plasma physics reports 2021-06, Vol.47 (6), p.623-626
Main Authors: Panov, V. A., Pecherkin, V. Ya, Vasilyak, L. M., Vetchinin, S. P.
Format: Article
Language:English
Subjects:
Anodes
Applied Physics
Atomic
Breakdown
Electric contacts
Electric discharges
Electric potential
Electrical resistivity
Insulation
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Voltage
Water discharge
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Summary:— The effect of electrode polarity in the pin-to-rod geometry on the development of pulsed electric discharge in water with specific electrical conductivity of (90 ± 10) µS/cm with and without air microbubbles was experimentally studied. It was found that the initiation of the plasma channel at the anode in water occurs near the metal–liquid–insulation contact in both anode geometries under study. In the presence of microbubbles at an increased voltage, the development of plasma channels after initiation occurs in the direction opposite to the discharge gap along the insulated surface of the electrodes. In the presence of microbubbles, the breakdown voltage decreases, and the delay to discharge initiation and the total time of breakdown development by the channel propagating from the pin anode also decrease. When the voltage is increased, the development of the closing channel occurs from the cathode, regardless of its geometry.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X21060131