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Publication
Simulation of pre-breakdown discharges in high-pressure air. I: The model and its application to corona inception
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Advisor(s)
Abstract(s)
A ‘minimal’ kinetic model of plasmachemical processes in low-current discharges in high pressure air is formulated, which takes into account electrons, an effective species of positive
ions, and three species of negative ions. The model is implemented as a part of numerical
model of low-current quasi-stationary discharges in high-pressure air based on the use of
stationary solvers, which offer important advantages in simulations of steady-state discharges
compared to standard approaches that rely on time-dependent solvers. The model is validated
by comparison of the computed inception voltage of corona discharges with several sets of
experimental data on glow coronas. A good agreement with the experiment has been obtained
for positive coronas between concentric cylinders in a wide range of pressures and diameters
of the cylinders. The sensitivity of the computation results with respect to different factors
is illustrated. Inception voltages of negative coronas, computed using the values of the
secondary electron emission coefficient of 10−4
–10−3
, agree well with the experimental data.
A simplified kinetic model for corona discharges in air, which does not include conservation
equations for negative ion species, has been proposed and validated. Modelling of positive
coronas in rod-to-plane electrode configuration has been performed and the computed
inception voltage was compared with experimental data.
Description
Keywords
Gas discharge modelling Kinetics of ionized air Corona discharger Breakdown of high-pressure air . Faculdade de Ciências Exatas e da Engenharia
Citation
Ferreira, N. G. C., Santos, D. F. N., Almeida, P. G., Naidis, G. V., & Benilov, M. S. (2019). Simulation of pre-breakdown discharges in high-pressure air. I: The model and its application to corona inception. Journal of Physics D: Applied Physics, 52(35), 355206.
Publisher
IOP Publishing