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Unformatted text preview: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 46, NO. 5, SEPTEMBER/OCTOBER 2010 1699 FEM–FCT-Based Dynamic Simulation of Corona Discharge in Point–Plane Configuration Paria Sattari, Student Member, IEEE , G. S. Peter Castle, Life Fellow, IEEE , and Kazimierz Adamiak, Fellow, IEEE Abstract —In this paper, a numerical algorithm for the simula- tion of the dynamic corona discharge in air is proposed assuming single-species charge carriers. The simulation results show the behavior of corona current and space-charge density under two waveforms of the applied voltage: step and pulse. The electric field is calculated by means of the finite-element method, and the flux-corrected transport technique is utilized for the space-charge- density calculations. Index Terms —Corona discharge, dynamic simulation, finite- element method (FEM), flux-corrected transport (FCT). I. INTRODUCTION C ORONA-DISCHARGE studies have been undertaken for many years, not only because of the scientific interest in the corona mechanism but also because of its practical engineering importance . Many industrial devices, such as electrostatic precipitators (ESPs), ozone generators, and others, use corona discharge , . While in most cases, a dc corona is generated, sometimes a pulsed corona discharge can lead to process improvement. The numerical simulation of the full dynamics of transient corona discharge is important for the optimization of these devices . The majority of published studies dealt with the point–plane electrode systems and dc voltages rather than pulsed. This is because dc systems are much simpler for understanding and analysis. Corona systems with pulse energization are preferred in many applications because of lower power consumption and reduction of some parasitic effects, such as the back corona discharge. While some authors attempted simulation of the full corona dynamics, to date, no simple model of the electric corona discharge, valid for an arbitrary waveform of the applied voltage, has been presented. Menegozzi and Feldman  developed a 1-D time-dependent model of Trichel pulse development in a wire–cylindrical geometry. They simplified their model to avoid large-scale Manuscript received September 18, 2009; revised January 14, 2010; accepted February 20, 2010. Date of publication July 12, 2010; date of current version September 17, 2010. Paper 2009-EPC-309.R1, presented at the 2009 Joint Conference on Electrostatics, Boston, MA, June 16–18, and approved for pub- lication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Electrostatic Processes Committee of the IEEE Industry Applications Society. This work was supported in part by the Natural Science and Engineering Research Council (NSERC) of Canada....
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