Boundary conditions for the positive direct-current corona in a coaxial system
- 14 February 1988
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 21 (2), 322-333
- https://doi.org/10.1088/0022-3727/21/2/012
Abstract
The work shows the crucial need for a careful choice of boundary conditions, particularly near the corona electrode, and revises the boundary conditions usually employed in classical methods. Commonly adopted assumptions which result in the corona radius and corona voltage drop being taken as constant have been shown to be inappropriate, since they lead to ambiguity in the mobility values. Values of positive-ion mobility based upon all three measured parameters have been calculated, using various models for the corona region, and these show a decrease in mobility with increasing humidity. This mobility is consistent with the field equations, and no dependence was found upon field strength or ion aging. The models yield an estimate of the dimensions and voltage drop for the corona ionisation region and the value of the field at the corona electrode.Keywords
This publication has 11 references indexed in Scilit:
- Theoretical Evaluation of Peek's LawIEEE Transactions on Industry Applications, 1984
- Simple approximate treatment of unipolar space-charge-dominated coronas: The Warburg law and the saturation currentJournal of Applied Physics, 1982
- Static Probe for Electrostatic Field Measurement in the Presence of Space ChargeIEEE Transactions on Industry Applications, 1980
- Characteristics of the stabilized glow discharge in airJournal of Physics D: Applied Physics, 1975
- Boundary probe for measurement of current density and electric-field strength—with special reference to ionised gasesProceedings of the Institution of Electrical Engineers, 1974
- Direct measurement of electric field at line conductors during a.c. coronaProceedings of the Institution of Electrical Engineers, 1972
- The structure of the impulse corona in a rod/plane gap I. The positive coronaProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1970
- Die Entwicklung der positiven Vorentladungen in Luft zum DurchschlagElectrical Engineering, 1960
- Über die Dichteverteilung unipolarer IonenströmeAnnalen der Physik, 1933
- XI. The potentials required to maintain currents between coaxial cylindersJournal of Computers in Education, 1914