Jet Electrical Discharge with a Liquid Plasma-Forming Medium in Interaction with Aluminum
Published: 11.02.2026
Authors: Petryakov S.Yu., Belgibaev E.R., Kayumov R.R., Gaisin A.F.
Published in issue: #2(170)/2026
Category: Mechanics | Chapter: Mechanics of Liquid, Gas, and Plasma
The results of an experimental and theoretical study of a jet electrical discharge with a liquid plasma-forming medium interacting with aluminum are presented. The discharge was realized in the configuration “jet anode–aluminum cathode” at atmospheric pressure within different ranges of such parameters as voltage, jet velocity (jet diameter 2 mm), solution specific electrical conductivity, and temperature. Based on high-speed visualization data, two typical discharge channel geometries were identified: a longitudinal channel along the jet body and a near-surface channel in the form of a cone-shaped luminous volume at the liquid–gas–metal interface. A threshold transition from the electrochemical regime (approximately 200 V, bubble formation without discharge initiation) to the pulsed plasma regime (approximately 700 V) was revealed, characterized by current pulses with amplitudes of 1.0–1.2 A and durations of up to 500 μs. Emission spectroscopy revealed the presence of OH (A–X) bands, (B–X) bands, and H I, Na I, N I, and Al I spectral lines. The electron concentration was estimated from Stark broadening of hydrogen lines. Thermographic measurements recorded a local temperature maximum of the jet anode in the contact zone of about 64 °C, followed by a decrease toward ambient temperature.
EDN BNDWLP
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