Towards an Efficient Arc Simulation Framework

Fuchs, Roman; Murmann, M.; Nordborg, Henrik

doi:10.14311/ppt.2017.1.79

Cited by 5 publications

(2 citation statements)

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“…Both issues could be addressed by adapting the boundary conditions and adding a constraint enforcing the second law of thermodynamics, as well as by improving the minimization algorithm to avoid getting stuck in local minima. Others are also developing more sophisticated models that include radiation transport and fluid dynamics more accurately, like for example [21,22] or more recently [23]. Using these models probably gives a much more accurate picture of the arc, and might prove (or disprove) the hypothesis of the critical radius.…”

Section: Discussionmentioning

confidence: 99%

Controlling the differential resistance of axial blown arcs

Bort

Vonesch

Franck

2019

J. Phys. D: Appl. Phys.

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Transfer switches for future HVDC systems can be based on passive oscillation principle to create a current zero crossing. The principle relies on a negative differential arc resistance du/di of the mechanical switch. Present investigation aims to understand and quantify under which conditions the du/di is negative. For this, results from electrical arc measurements are compared to results from a 1D arc model. Based on this, the authors conclude that ablation is not the reason for non-negative du/di. In fact it is rather the location of the smallest arc radius which determines the negative characteristic. As soon as the turbulent shear layer is thick enough compared to the total arc diameter that it influences the temperature at the arc center, the du/di turns negative. The current at which this happens scales with p 2/3 , can be influenced by the nozzle shape and is rather insensitive to the chosen type of blowing gas.

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Section: Discussionmentioning

confidence: 99%

Controlling the differential resistance of axial blown arcs

Bort

Vonesch

Franck

2019

J. Phys. D: Appl. Phys.

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“…The current flowing through this artificial channel heats up the gas so that the gas conductivity soon exceeds the artificial minimum conductivity. Such approaches to ignite the arc have also been used by Bernardi et al [17], Chine [18], [19] and Fuchs et al [20].…”

Section: Electrical Conductivity Constraint and The Initial Hot Channelmentioning

confidence: 99%

Numerical Simulation of Helium Arc at High Pressure and Low Current

Maharaj

Kazak

Limone

et al. 2022

IEEE Trans. Plasma Sci.

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A Computational Fluid Dynamics (CFD) model has been developed to investigate the time evolution of a Helium plasma discharge at high pressures (from 2 -8 MPa) and low electric current (0.35 A), including the interaction between the plasma and the electromagnetic fields, under Local Thermodynamic Equilibrium (LTE) assumption. To account for pressure dependence, novel thermodynamic and transport properties have been calculated in a wide pressure and temperature range. The model has been further improved by considering the effect of plasma-electrode interactions and the formation of the plasma sheath. High Performance Computing (HPC) was used to solve the CFD simulation, focusing on reference cases at 8 MPa and 0.35 A. Numerical results have shown that the sheath model and updated transport and thermodynamic properties have a significant impact on the electric potential, resulting in very good agreement between the simulation and experimental values.

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