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ORIGINAL RESEARCH article

Front. Phys.
Sec. Low-Temperature Plasma Physics
Volume 12 - 2024 | doi: 10.3389/fphy.2024.1356303
This article is part of the Research Topic Electrical Breakdown and Discharge Plasma at Small Scales: Characteristics, Mechanisms, and Applications View all 5 articles

Effective ignition energy study of capacitor short circuit discharge in explosive environments

Provisionally accepted
Dangshu WANG Dangshu WANG *Yang Likang Yang Likang *Shulin Liu Shulin Liu *Xinxia Wang Xinxia Wang *Song Luwen Song Luwen *WU Fengjuan WU Fengjuan *
  • School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China

The final, formatted version of the article will be published soon.

    Capacitors short-circuit discharge in explosive environments will ignite and detonate the surrounding explosive medium, cause dangerous accidents. Capacitors short-circuit discharge at low voltage is a kind of micro-nano discharge. Due to the discharge gap being only micro-nanometers, the discharge process, electrode consumption energy, ignition of explosive media ignition energy and other energy relationships are not clear. In order to study the relationship between capacitor storage energy and various kinds of dissipation energy when the capacitor is short-circuited discharged, this paper establishes the conical and spherical cylinder micro-bump model according to the morphology of cathode surface obtained by three-dimensional profile scanner and scanning electron microscope, respectively. This paper establishes the second-order non-chiral differential equation according to the principle of energy conservation and heat balance and deduces the relationship between the cathode surface temperature and the height of micro-bump, the conical angle, and the spherical radius, and calculates the energy consumed by the anode surface based on the theory of heat transfer. Based on the heat conduction theory, the energy consumed by the micro-bump on the cathode surface was calculated; the energy consumed on the anode surface was deduced from the heat conduction theory using the surface heat source as the loading heat source; the residual energy of the capacitor was calculated based on the discharge time and the voltage size before and after the discharge; and the effective energy of the gas was calculated based on the law of conservation of energy. Finally, the discharge channel energy and electrode consumption energy, the end of the discharge capacitor residual energy, are used to ignite the explosive gas effective ignition energy relationship.

    Keywords: Cathode consumes energy, Cathode surface, Spark discharge, Effective ignition energy, Micro-nano gap

    Received: 15 Dec 2023; Accepted: 14 Jun 2024.

    Copyright: © 2024 WANG, Likang, Liu, Wang, Luwen and Fengjuan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Dangshu WANG, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China
    Yang Likang, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China
    Shulin Liu, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China
    Xinxia Wang, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China
    Song Luwen, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China
    WU Fengjuan, School of Electrical and Control Engineering,Xi'an University of Science and Technology, Xi'an, China

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