Cavity initiation through an evaporating mechanism for the pulse breakdown in liquids

V. Atrazhev, V. Vorobev, I. Timoshkin, S.J. MacGregor, M.J. Given

Research output: Contribution to conferencePaper

Abstract

This paper presents an analytical model which describes the dielectric strength of insulating liquids stressed with the impulse electric fields. The Joule heating by the space charge saturated current may cause over-heating of pure liquids or may result in generation of nucleation centers associated with impurities in the case of practical liquids. Evaporation of the liquid from these impurities has been analysed in the paper and formation criterion for percolation chains of gas bubbles in impure dielectric liquids has been established. Based on this percolation condition, the dielectric behavior of n-hexane has been studied. Breakdown volt-time characteristics of liquid n-hexane have been calculated for different temperatures, and its dielectric strength has been obtained as a function of externally applied pressure.
Original languageEnglish
Pages447
Number of pages1
DOIs
Publication statusPublished - Jun 2009
Event17th IEEE International Pulsed Power Conference - Washington, United States
Duration: 28 Jun 20092 Jul 2009

Conference

Conference17th IEEE International Pulsed Power Conference
CountryUnited States
CityWashington
Period28/06/092/07/09

Keywords

  • analytical models
  • dielectric breakdown
  • dielectric liquids

Projects

Cite this

Atrazhev, V., Vorobev, V., Timoshkin, I., MacGregor, S. J., & Given, M. J. (2009). Cavity initiation through an evaporating mechanism for the pulse breakdown in liquids. 447. Paper presented at 17th IEEE International Pulsed Power Conference, Washington, United States. https://doi.org/10.1109/PPC.2009.5386266