Electrical Energy Conversion Characteristics based on Underwater High-voltage Pulse Discharge

  • Dong Yan College of Architecture and Civil Engineering,Xinyang Normal University
  • Songbai Chen College of Architecture and Civil Engineering,Xinyang Normal University
  • Qiong Wu College of Architecture and Civil Engineering,Xinyang Normal University
  • Fengxiang Zhang College of Architecture and Civil Engineering,Xinyang Normal University
  • Lipeng Lai College of Architecture and Civil Engineering,Xinyang Normal University
  • Inchen Chen College of International Exchange,Krirk University

Abstract

Underwater high-voltage (HV) pulse discharge mainly involves the process of HV discharge, breaking down water and releasing huge amounts of electrical energy, which is then rapidly converted into plasma. The plasma expands and creates shock waves and bubble pulsation effects. These effects are the main ways in which electrical energy transfers into mechanical energy. A breakdown process analysis model and an experimental method are proposed with a view to revealing the energy conversion characteristics during underwater pulse discharge and to understand the basic physical process. A plasma channel model was established in combination with the existing fundamentals of electricity and theoretical analysis. In addition, the discharge process was analyzed, along with shock wave and bubble pulsation action characteristics, on the basis of an underwater pulse discharge experiment. Meanwhile, theoretical analysis revealed the basic physical process involved in the electrical energy conversion effect. The results demonstrate the following: (1) The "vaporization-ionization" breakdown model divides the breakdown process into three stages (i.e.,  heating effect, breakdown detonation and mechanical energy effect stages); (2) the heating effect stage is a phase prior to breakdown, which possesses significant heating characteristics and generates initial plasma; (3) a large electric current (104A) during the breakdown process heats the plasma channel to a high-temperature, where it becomes dense; this condition is followed by an instant decrease in channel resistance; the breakdown current peak depends on the residual voltage at the moment of breakdown; (4) during the breakdown detonation stage, discharge breakdown occurs, along with electric arc detonation. After the heating gasification process, when the electrical field intensity is sufficient, the high-temperature HV plasma rapidly expands outward, resulting in a rapid conversion from electrical energy to mechanical energy. Thus, shock waves are formed, followed by bubble pulsation. The proposed method provides a good prospect for the application of underwater HV pulse discharge technology in the field of engineering.
Published
2021-12-26
How to Cite
YAN, Dong et al. Electrical Energy Conversion Characteristics based on Underwater High-voltage Pulse Discharge. Journal of Power Technologies, [S.l.], v. 101, n. 4, p. 190-201, dec. 2021. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1768>. Date accessed: 24 may 2022.
Section
Energy Engineering and Technology

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