CURRENT DISTRIBUTION OF AC SURFACE DISCHARGES AND ASSOCIATED CHEMISTRY

Abstract : It is shown that ac discharges propagating at an air / dielectric interface, though of planar structure, behave, till a critical voltage Vcrit, as corona discharges in an air gap, with similar propagation fields for the filamentary discharge components and similar glow components. This leads to consider the surface discharges as gas discharges propagating above the dielectric surface. Beyond Vcrit, the retention of charges by the dielectric surface becomes ineffective, due to the gas heating in the filamentary channels and to the heat subsequently transferred from these channels to the surface. In return, the surface gives its energy excess back to the discharge, so opening the way, on the surface, to leader-like discharges of higher conductivity, needing about 10 times lower fields to propagate.
Document type :
Journal articles
Complete list of metadatas

Cited literature [2 references]  Display  Hide  Download

https://hal-supelec.archives-ouvertes.fr/hal-00221383
Contributor : Christiane Le Bouquin <>
Submitted on : Monday, January 28, 2008 - 3:07:39 PM
Last modification on : Thursday, June 14, 2018 - 5:22:03 PM
Long-term archiving on : Friday, April 30, 2010 - 12:23:20 AM

File

OdicJE06.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-00221383, version 1

Collections

Citation

Emmanuel Odic, Alice Goldman, Max Goldman, Marielle Dhainaut, Rémi Dussart. CURRENT DISTRIBUTION OF AC SURFACE DISCHARGES AND ASSOCIATED CHEMISTRY. Journal of Electrostatics, Elsevier, 2006, 64 (7-9), pp.477-484. ⟨hal-00221383⟩

Share

Metrics

Record views

358

Files downloads

271