Author(s): WANG Lijun, JIA Shenli, SHI Zongqian, RONG Mingzhe
Pages: 2687-2692
Year: 2005 Issue:  1
Journal: PLASMA SCIENCE AND TECHNOLOGY
Keyword:  vacuum arc; MHD; magnetic constriction; axial magnetic field;
Abstract: Based on magnetohydrodynamic (MHD) model of vacuum arc, the computer simulation of vacuum arc was carried out in this paper. In the MHD model, mass conservation equation,momentum conservation equations, energy conservation equations, generalized ohm's law and Maxwell equation were considered. MHD equations were calculated by numerical method, and the distribution of vacuum arc plasma parameters and current density were obtained. Simulation results showed that the magnetic constriction effect of vacuum arc is primarily caused by the Hall effect. In addition, the inhibition of axial magnetic field (AMF) on constriction of vacuum arc was calculated and analyzed.