The guiding effect of artificially injected gas bubble on the underwater pulsed spark discharge and its electrical and acoustic parameters after breakdown

Guo, Xu and Sun, Ying and Liu, Chen-Lei and Jing, Lin and Zhang, Yuan-Tao and Wang, Xiao-Long and Timoshkin, Igor (2022) The guiding effect of artificially injected gas bubble on the underwater pulsed spark discharge and its electrical and acoustic parameters after breakdown. Physics of Plasmas, 29 (11). 113504. ISSN 1070-664X (https://doi.org/10.1063/5.0122080)

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Abstract

The presence of a low density area is beneficial to the facilitation of the underwater pulsed spark discharge, which can be achieved by artificially injecting gas bubble in between the inter-electrode gap. The generation of intensive acoustic waves by such gas-bubble-guided spark discharges makes them promising underwater acoustic sources in multiple practical applications. This paper is aimed at comprehensive investigation of the guiding effect of the injected bubble on the pre-breakdown process of underwater pulsed spark discharges and potential correlations between their subsequent electrical and acoustic parameters with the purpose of optimizing the acoustic emission. The breakdown probability and the pre-breakdown delay were used to evaluate the general facilitation effect brought by the injected bubble. Experimental and numerical works have been conducted and allow observation on the dynamics of the injected bubble under the influence of the applied voltage. Different guiding modes of the injected bubble for plasma streamers' propagation have been observed regarding its relative position. The characteristics of the electrical properties of gas-bubble-guided spark discharges, including the plasma resistance and the plasma energy density, were analyzed by relating them with the breakdown voltage. The dependency of the acoustic wave amplitude and the acoustic efficiency on these electrical parameters was verified, which provides solid regulation principles for the optimization of the plasma-acoustic system for target practical applications.

  • Item type:Article
    ID code:85886
    Dates:
    Date
    Event
    7 November 2022
    Published
    5 October 2022
    Accepted
    Notes:Copyright © 2022 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas, 29(11) and may be found at https://doi.org/10.1063/5.0122080
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:21 Jun 2023 14:15
    Last modified:26 Apr 2024 00:56
    URI:https://strathprints.strath.ac.uk/id/eprint/85886
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