Open AccessMeasurements of Corona Discharge in Sharp –to-Plane Electrodes Configuration
Author(s) -
Hassan Jasim Mohammed
Publication year - 2018
Publication title -
mağallaẗ diyālá li-l-ʿulūm al-handasiyyaẗ/mağallaẗ diyālá li-l-ʻulūm al-handasiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2616-6909
pISSN - 1999-8716
DOI - 10.24237/djes.2018.11312
Subject(s) - corona (planetary geology) , corona discharge , brush discharge , corona ring , voltage , mechanics , electric field , townsend discharge , electrode , plane (geometry) , materials science , breakdown voltage , atmospheric pressure , atomic physics , electrical engineering , physics , meteorology , ion , ionization , geometry , mathematics , quantum mechanics , astrobiology , venus , engineering
A Dc positive sharp- to –plane Corona phenomena have been studied in electronegative gases (air ,and SF6 ) for pressure up to (3.2bar and gap length from 0.1 to 0.5 cm), with high degree of non-uniformity electric field. The corona –breakdown phases can exhibit anomalous characteristics. The exact physical process of such phenomena is not yet fully understood complete. To better understand this process precise knowledge about corona and spark discharge is necessary. Hence the dependency of corona inception and spark breakdown voltage on the pressure, non-uniformity field factor and the type of applied voltage ,also the type of materials.
The steady region of corona discharge is observed in the ( sharp- to- plane ), for applied voltage between the threshold value voltage and onset value , we observe an effect that attaching gases. A Townsend type of discharge develops in the region close to point. At voltages above the onset value , the burst pulses are replaced by a Dc current ,and in some cases 'pre-breakdown ' streamer are also observed.