On the fluctuations in positive glow corona

Author

Allen, N.L. ; Abdel-Salam, M. ; Boutlendj, M. ; Cotton, I. ; Tan, B.H.

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Manchester

Volume

1

Issue

2

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

103

Lastpage

112

Abstract

Current knowledge of fluctuations in the steady glow current of the positive rod-to-plane corona at normal air density is reviewed. New work has been extended to investigate how the frequency and amplitude of these fluctuations change with the air density and humidity. The air density has been changed both by decreasing the pressure and by increasing the temperature. The pressure has been decreased down to 0.6 bar, and the temperature has been increased up to 200degC. A method is proposed for calculating the frequency of fluctuations in any rod-plane gap with known field distribution. The method is based on assessment of the space charges developed in a positive glow corona that fill not only the ionisation zone around the rod but also the inter-electrode spacing. These space charges result in an electric field that affects the frequency of these fluctuations. The calculated frequency values agree reasonably with those measured for different rod diameters

Keywords

corona; fluctuations; glow discharges; air density; air humidity; amplitude; fluctuations; frequency; interelectrode spacing; ionisation zone; positive glow corona; positive rod-to-plane corona; space charges; steady glow current;

fLanguage

English

Journal_Title

Science, Measurement & Technology, IET

Publisher

iet

ISSN

1751-8822

Type

jour

DOI

10.1049/iet-smt:20050071

Filename

4135917