Simulation Research on the Characteristics of Supersonic Vacuum Arc

摘要

The research on the characteristics of vacuum arc plays an important role on development of vacuum circuit breaker. In this study, an improved MHD of supersonic vacuum arc was established. The model took the actually flowing status of supersonic vacuum arc into account. The influence of contactor geometry parameters on the characteristics of supersonic was obtained and analysed in detail. It shown that, both of the contactor radium and gap length have impact on the plasma density, ion temperature, electron temperature, plasma pressure and energy flux density on anode surface. The increase of contactor radius and the decrease of gap length result in the homogeneous distribution of the energy flux density. Thus they benefit the improvement of interruption performance of vacuum circuit breakers.