记笔记

TWO-TEMPERATURE MODELLING OF SF₆ ARC BEHAVIOUR IN A SUPERSONIC NOZZLE

WEIZONG WANG^1,2JOSEPH D YAN²MINGZHE RONG¹JOSEPH W SPENCER²

1. State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University 2. Department of Electrical Engineering and Electronics,University of Liverpool,Brownlow Hill,Liverpool L69 3GJ,UK

摘要：<正>A two-temperature plasmas model is developed for SF₆ arcs burning in a supersonic nozzle under direct current conditions.The properties of SF₆ arcs required for fluid dynamic simulation under equilibrium and non-equilibrium conditions are calculated from fundamental theory.The Prandtl mixing length model is used to represent the influence of turbulence flow.The computed physical quantities from the non-equilibrium model are compared with those of an equilibrium model and measurement at 600 A.Results show that deviation of electron temperature from heavy particle temperature occurs mainly at the edge of the plasma where the arc experiences strong interaction with the surrounding cold-flow. Quantitative analysis is performed on the energy exchange mechanisms between electrons and heavy particles,which provides the foundation for further theoretical investigation of transient SF₆ arcs in switching applications.

会议名称：

The ⅪⅩ International Conference on Gas Discharges and Their Applications

会议时间：

2012-09-02

会议地点：

中国北京