Comparsion of CO2 Nozzle Arc Simulation During Current Zero Period based on the Non-CE and LTE Models

The dynamic arc behavior during the current zero (CZ) period is different from that of the arc burning stage. The rapid decay of temperature leads to a rapid decrease in the chemical reaction rate inside the arc plasma. Therefore, a new numerical model needs to be established to reflect the non-chemically equilibrium (non-CE) effect on the arc decay process. The dynamic behavior of CO
2
nozzle arc was investigated in the established non-CE model from two aspect: (1) the macroscopic behavior which includes the arc temperature decay and the change of enthalpy. (2) the microscopic mechanism which includes the particle composition, non-equilibrium degree and the decay process of electron number density.