Breakdown processes in gas micro-bubbles in liquids under electric stress

Vladimir Atrazhev, V.S. Vorob'ev, Igor Timoshkin, Scott MacGregor, M Given, Mark Wilson, Tao Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The present work is concerned with a theoretical analysis of the breakdown characteristics of gas-filled micro-bubbles formed in insulating liquids stressed with electric field. It is assumed that the gas inside these bubbles is air which allows the use of experimental Paschen curve data for air in this analysis. Two main discharge mechanisms have been considered, the Townsend discharge and impulse breakdown. The combination of bubble diameter, D, gas pressure, p, and duration, τ, of the field stress determines the type of breakdown. Parameters which are required for the Townsend mechanism of breakdown and impulse breakdown to occur inside gas bubbles have been obtained and these conditions have been represented as boundary lines in the (Dp, τp) coordinate system. It is shown that there are such combinations of these parameters which satisfy neither Townsend nor impulse breakdown conditions. Experimental data on breakdown in air for these intermediate values of (Dp, tp) between the Townsend and the impulse discharges are not available in the literature and the breakdown behavior under such conditions is not well defined.
LanguageEnglish
Pages1552-1558
Number of pages7
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume19
Issue number5
DOIs
Publication statusPublished - Oct 2012

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Bubbles (in fluids)
Liquids
Gases
Air
Discharge (fluid mechanics)
Electric fields

Keywords

  • breakdown in micro-bubbles
  • impulse breakdown
  • Townsend breakdown

Cite this

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title = "Breakdown processes in gas micro-bubbles in liquids under electric stress",
abstract = "The present work is concerned with a theoretical analysis of the breakdown characteristics of gas-filled micro-bubbles formed in insulating liquids stressed with electric field. It is assumed that the gas inside these bubbles is air which allows the use of experimental Paschen curve data for air in this analysis. Two main discharge mechanisms have been considered, the Townsend discharge and impulse breakdown. The combination of bubble diameter, D, gas pressure, p, and duration, τ, of the field stress determines the type of breakdown. Parameters which are required for the Townsend mechanism of breakdown and impulse breakdown to occur inside gas bubbles have been obtained and these conditions have been represented as boundary lines in the (Dp, τp) coordinate system. It is shown that there are such combinations of these parameters which satisfy neither Townsend nor impulse breakdown conditions. Experimental data on breakdown in air for these intermediate values of (Dp, tp) between the Townsend and the impulse discharges are not available in the literature and the breakdown behavior under such conditions is not well defined.",
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Breakdown processes in gas micro-bubbles in liquids under electric stress. / Atrazhev, Vladimir; Vorob'ev, V.S.; Timoshkin, Igor; MacGregor, Scott; Given, M; Wilson, Mark; Wang, Tao.

In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 19, No. 5, 10.2012, p. 1552-1558.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Breakdown processes in gas micro-bubbles in liquids under electric stress

AU - Atrazhev, Vladimir

AU - Vorob'ev, V.S.

AU - Timoshkin, Igor

AU - MacGregor, Scott

AU - Given, M

AU - Wilson, Mark

AU - Wang, Tao

PY - 2012/10

Y1 - 2012/10

N2 - The present work is concerned with a theoretical analysis of the breakdown characteristics of gas-filled micro-bubbles formed in insulating liquids stressed with electric field. It is assumed that the gas inside these bubbles is air which allows the use of experimental Paschen curve data for air in this analysis. Two main discharge mechanisms have been considered, the Townsend discharge and impulse breakdown. The combination of bubble diameter, D, gas pressure, p, and duration, τ, of the field stress determines the type of breakdown. Parameters which are required for the Townsend mechanism of breakdown and impulse breakdown to occur inside gas bubbles have been obtained and these conditions have been represented as boundary lines in the (Dp, τp) coordinate system. It is shown that there are such combinations of these parameters which satisfy neither Townsend nor impulse breakdown conditions. Experimental data on breakdown in air for these intermediate values of (Dp, tp) between the Townsend and the impulse discharges are not available in the literature and the breakdown behavior under such conditions is not well defined.

AB - The present work is concerned with a theoretical analysis of the breakdown characteristics of gas-filled micro-bubbles formed in insulating liquids stressed with electric field. It is assumed that the gas inside these bubbles is air which allows the use of experimental Paschen curve data for air in this analysis. Two main discharge mechanisms have been considered, the Townsend discharge and impulse breakdown. The combination of bubble diameter, D, gas pressure, p, and duration, τ, of the field stress determines the type of breakdown. Parameters which are required for the Townsend mechanism of breakdown and impulse breakdown to occur inside gas bubbles have been obtained and these conditions have been represented as boundary lines in the (Dp, τp) coordinate system. It is shown that there are such combinations of these parameters which satisfy neither Townsend nor impulse breakdown conditions. Experimental data on breakdown in air for these intermediate values of (Dp, tp) between the Townsend and the impulse discharges are not available in the literature and the breakdown behavior under such conditions is not well defined.

KW - breakdown in micro-bubbles

KW - impulse breakdown

KW - Townsend breakdown

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