摘要详情

ID / 提交时间

113 / 2021-06-09 21:49:10

标题

Numerical Modeling of CO2 Arc based on the Non-chemical Equilibrium

关键字

主题及专题

放电等离子体动力学计算

状态

摘要录用

作者

张雨石 / 西安交通大学

孙昊 / 西安交通大学

摘要

Carbon dioxide (CO2) and its mixture are potential alternative gases for arc extinguishing. During the arc decaying phase, the non-chemically equilibrium (non-CE) effect leads to the error of local thermal equilibrium (LTE) model in predicting the arc behavior. This paper is focused on the dynamic behavior of CO2 arc after current zero crossing. A non-CE numerical model is established. The decay process of temperature, energy and electric conductance between the LTE and non-CE models are compared from the aspect of macroscopic behaviors. The composition distribution, non-equilibrium parameter distribution and transport process of the particles are investigated based on the microscopic mechanism. The theoretical calculation results of this paper are compared with the experimental results in the literature and the model accuracy is verified.

Key word: carbon dioxide, numerical model, non-chemically equilibrium behavior