Simulation of features of electrons during a pulse period in rod-plate DC negative corona using a plasma chemical model

Abstract

In order to discuss the features of electrons in negative corona, a 2D, multi-component, and plasma chemical improved model is detailedly presented for the simulation of rod-plate DC corona discharge in dry air (O 2 :N 2 =1:4). The model is based on plasma hydrodynamics and chemical models in which 28 reactions are considered. The simulation is established with a rod-plate electrode configuration with an inter-electrode gap of 3.3 mm, the voltage applied to the rod is DC −5.0 kV, the pressure in air discharge fixed at standard atmospheric pressure (1.0 atm), and the ambient temperature assumed to be a constant (300 K). Based on this improved model, electron mean energy distribution, electron density distribution, generation and dissipation rates of electron at 6 typical time points during a pulse period are analysed emphatically.