Author_Institution :
Sch. of Electr. Eng., Shenyang Univ. of Technol., Shenyang, China
Abstract :
The three dimensional magnetohydro dynamic (MHD) model of vacuum arc was obtained based on two-fluid model of ion and electron and Maxwell equation. In the MHD model, mass conservation equation, momentum conservation equations, energy conservation equations of ion and electron, voltage equations and magnetic equations were considered. Characteristics of large-current vacuum arc were simulated and analyzed through computing fluid dynamic(CFD) software FLUENT and Re-developmented visual c++. And the formation mechanism of the following plasma parameters distribution, such as plasma density, axial current density, plasma velocity, Mach number, ion temperature, electron temperature, ion pressure, plasma pressure was analyzed. The simulation results shown that the maximal plasma pressure and plasma density of vacuum arc appears near the cathode side, but the minimum plasma velocity and Mach number of vacuum arc appears there.
Keywords :
Mach number; Maxwell equations; energy conservation; magnetohydrodynamics; momentum; vacuum arcs; Mach number; Maxwell equation; axial current density; computing fluid dynamic; electron temperature; energy conservation equations; ion pressure; ion temperature; large-current vacuum arc plasma; magnetic equations; mass conservation equation; momentum conservation equations; numerical simulation; plasma density; plasma pressure; plasma velocity; three dimensional magnetohydro dynamic model; two-fluid model; voltage equations; Anodes; Cathodes; Equations; Magnetic fields; Mathematical model; Plasmas; Vacuum arcs;
