Numerical simulation of vacuum arc under different axial magnetic fields

Wang, Lijun; Jia, Shenli; Shi, Zongqian; Rong, Mingzhe

doi:10.1088/0022-3727/38/7/011

Cited by 101 publications

(64 citation statements)

References 20 publications

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“…Model of vacuum arcs as shown in Fig.1 For the upper surface, the boundary condition is given by Ref. 9. The potential drop across the anode sheath is given by: …”

Section: Model Descriptionmentioning

confidence: 99%

Modeling of mixing and interaction of multi-cathode spot vacuum arc jets

et al. 2016

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Vacuum arc consists of cathode spot and mixing zone, arc column and anode zone. The separate jets and the mixing zone should be considered in the model of diffuse arc. Moreover, the interaction between the plasma jets in multi-cathode spot vacuum arc also is very important. In this paper, mixing and interaction of multi-cathode spot vacuum arc jets were studied through simulation. To completely investigate the mixing and interaction of vacuum arc jets, a steady 3D Magneto-Hydro-Dynamic (MHD) modeling was established. In order to find out the influence of different parameters on mixing and interaction of vacuum arc jets, simulations with different parameters such as currents, angel of vacuum arc jets, with or without electromagnetic equations, tilted jets and different height of mixing zone were conducted. The simulation results show that the densities of ion number and plasma pressure as well as ion temperature increase with the increase of arc current, while the plasma velocity decreases. The jet center is more deviated from the cathode center with the increase of angle of tilted jets.

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“…Model of vacuum arcs as shown in Fig.1 For the upper surface, the boundary condition is given by Ref. 9. The potential drop across the anode sheath is given by: …”

Section: Model Descriptionmentioning

confidence: 99%

Modeling of mixing and interaction of multi-cathode spot vacuum arc jets

et al. 2016

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“…13 In this paper, B y is considered uniform distribution, that is to say, the gradient of B y along different directions is zero.…”

Section: Momentum Conservation Equation In X Direction Ismentioning

confidence: 99%

“…About vacuum arc simulation, there are many simulation works, the typical works have been done by Keidar and co-workers, 9,10 Schade and co-workers, 11,12 and Wang et al 13,14 In Refs. 9 and 10, the diffuse arc and diffuse column arc under AMF are modeled and simulated.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar

et al. 2009

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In this paper, the two-dimensional high-current vacuum arc (HCVA) model under the combined action of axial magnetic field (AMF) and external magnetic field from bus bar (EMFBB) is established. Based on this model, the influence of AMF and EMFBB on HCVA characteristics can be simulated and analyzed. Simulation results show that the HCVA column will be deflected by the Lorentz force generated by EMFBB and higher arc current. Moreover, the deflection level will be increased with the increase in external EMFBB strength. For HCVA, due to the smaller axial velocity near cathode side, the deflection of plasma parameters (such as ion number density, ion temperature, electron temperature, plasma pressure, and so on) near cathode side is more significant than that near anode side. The current deflection near cathode side toward direction of Lorentz force is more significant than that near anode side.

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“…In addition, self-axial magnetic field calculated by Biot-Savart law is different from by solving magnetic vector potential equation. In previous paper [4], the ion flow of vacuum arc was in the supersonic status. With the increase of arc current, ion flow transited from supersonic to subsonic status.…”

Section: Introductionmentioning

confidence: 99%

“…Simulation in this paper is the extension and development of previous simulations [4]. First, we simulate and analyze the fundamental characteristics of HCVA.…”

Section: Introductionmentioning

confidence: 99%

MUD simulation of high-current vacuum arc under different axial magnetic fields

Wang

Jia

Shi

et al. 2006

2006 International Symposium on Discharges and Electrical Insulation in Vacuum

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Based on MHD model, high current vacuum arc (HCVA) is simulated and analyzed. In this model, the influence of ion kinetic energy and viscosity is considered. With the increase of arc current, plasma flow transits from supersonic to subsonic status; so, boundary conditions of cathode and anode side have to be adjusted. First, we simulate and analyze the fundamental characteristics of HCVA. Then, we simulate and analyze the influence of nonuniform distributed AMF on HCVA characteristics. According to the simulation results, the saddle-shaped AMF can more effectively inhibit plasma loss from arc column than that of bell-shaped AMF. Comparisons between simulation results and experimental results show the rightness of model and simulation.

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Numerical simulation of vacuum arc under different axial magnetic fields

Cited by 101 publications

References 20 publications

Modeling of mixing and interaction of multi-cathode spot vacuum arc jets

Modeling of mixing and interaction of multi-cathode spot vacuum arc jets

Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar

MUD simulation of high-current vacuum arc under different axial magnetic fields

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