An Electrostatic Approach to the Numerical Simulation of Combined Corona and Electrostatic Field in Three-Electrode System

摘要

Two-electrode systems consisting of ionizing electrode, such as wire, needle or the other one with small radius of surface curvature, and a non-ionizing electrode are often used in many applications of corona field. Multi-electrode systems are of more complicated structure and more complex methods are needed for their analysis. Numerical analysis of combined corona-electrostatic electric fields in wire-to-plane electrode system supplemented by a cylindrical non-ionizing electrode is presented in [1]. This third electrode is associated with the wire electrode in the dual corona-electrostatic arrangement. Electric field changes the sign in a point situated between the wire and cylindrical electrode. Electric field lines originating from the wire electrode will concentrate on a smaller region at the surface of the plane electrode, as compared with the case of a single wire element. Mathematical model of the field is similar to those commonly employed for the study of plain corona fields in wire-to-plane electrode systems.