Numerical simulation of pulsed corona discharge with dust particles at atmospheric pressure

摘要

Numerical investigation of a pulsed corona discharge has been carried out in the wire-cylindirical electrodes with the introduction of dust particles, which is initially presumed throughout the reactor uniformly. A dust-charging model has been employed and developed. Based on the simulation began with a constant voltage of 35 kV applied to the anode, comparisons have been conducted among cases with dust of different particle density and radius. The electron density, the electric field, the current in the external circuit, and the propagation of the ionizing wave have been examined respectively. Results indicate that such physical properties of the discharge can be influenced by the charging process of the dust particles in the reactor. The distinctions between results of different cases appear to be more remarkable with the lapse of time, which can be barely observed in the early stage of discharge (similar to 50 ns). In particular, the propagation of the ionizing wave can be terminated by adequately choosing the value of dust density and radius. (c) 2005 American Institute of Physics.