Modeling of DC corona discharge along an electrically conductive flat plate with gas flow

The development of a corona discharge was evaluated numerically over a finite region of a semi-infinite flat plate having small (ohmic) surface conductivity with flowing gas. The model simulates a positive ion corona discharge (ionic wind) in the direction of gas flow generated by two parallel wires...

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Bibliographic Details
Published in:IEEE transactions on industry applications 1999-03, Vol.35 (2), p.387-394
Main Authors: Colver, G.M., El-Khabiry, S.
Format: Article
Language:English
Subjects:
Conductivity
Corona
Coronas
Current distribution
Differential equations
Electric potential
Electrically conductive
Electrodes
Flat plates
Fluid flow
Gas flow
Mathematical models
Partial differential equations
Surface discharges
Voltage
Wires
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Summary:The development of a corona discharge was evaluated numerically over a finite region of a semi-infinite flat plate having small (ohmic) surface conductivity with flowing gas. The model simulates a positive ion corona discharge (ionic wind) in the direction of gas flow generated by two parallel wires mounted flush with the surface of the plate. The deposition and removal of ions at the surface are permitted. Five coupled partial differential equations govern the gas phase model together with empirical equations for electrical discharge (/spl Phi/-I characteristic). Two voltage bias case studies were considered: first, the two electrodes have the same potential but are of opposite sign; and second, the positive electrode carries the full potential with the remaining electrode grounded. Several interesting effects are noted relating to the voltage and current distribution, surface potential, and free-stream velocity. Boundary layer development and surface shear are also discussed.
ISSN:0093-9994
1939-9367
DOI:10.1109/28.753633