Cavitation in the vicinity of the high-voltage electrode as a key step of nanosecond breakdown in liquids

2013/06/10 by I Marinov, Iuri Marinov, O Guaitella +5
Engineering · Medicine · #Electrohydrodynamics and Fluid Dynamics #Plasma Applications and Diagnostics #Power Transformer Diagnostics and Insulation

paper · doi:10.1088/0963-0252/22/4/042001

openalex publication_date 2013/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

Fast shadowgraphy of nanosecond discharge in liquids with different dielectric permittivity, namely in water, ethanol and n -pentane, has been performed. Formation of a gas cavity at a nanosecond time scale was observed as a pre-breakdown phenomenon at amplitudes of the high-voltage pulse close to the breakdown threshold. This phenomenon is considered as a possible key step of high-voltage breakdown in polar liquids.

Citations

• Characterization of a direct dc-excited discharge in water by optical emission spectroscopy

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