Analysis of Space Charge Distribution in dc Corona Discharge Field Computed With Finite-Element Method

摘要

Method of the dc corona field calculation is proposed. Suitable boundary conditions of the discharge electrode are investigated. Computations based upon the finite-element method are performed using commercial programs. A new mathematical expression, which meets Kaptzov’s assumption, is introduced to describe the electric charge distribution near the surface of the corona electrode. Application of the COMSOL, which enables us to use the iterative procedure merged with MATLAB capabilities has been used for the modeling. Space charge density distribution in interelectrode space is presented. 2-D numerical model for computation of the direct current corona field in wire-to-plane electrode system is presented. Results have been obtained using mathematical model and compared with experimental ones.