The study presents a detailed experimental and numerical analysis of the corona characteristics of a proposed tri-electrode system' for electrostaticseparation applications. The system consists of an ionising wir...
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The study presents a detailed experimental and numerical analysis of the corona characteristics of a proposed tri-electrode system' for electrostaticseparation applications. The system consists of an ionising wire, a movable auxiliary wire and a non-ionising cylinder, having the same voltage and placed parallel above a grounded plate. A computational technique coupling the method of characteristics and the charge simulation method is developed to model the corona governing equations of the proposed configuration. Influence of the auxiliary wire's position on field modulation of the ionising wire, corona onset and switching on/off of the discharge is established both numerically and experimentally. Dependence of the spatial distributions of the electric field and current density on the system's geometrical characteristics is evaluated and assessed. The study includes a physical model of the corona discharge of this particular electrode arrangement and demonstrates the configuration's specific features and advantages as compared with the earlier designs. The computed results compared favourably well with experiments.
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