Modeling the Restrike Mode Operation of a DC Plasma Spray Torch

Moreau, E.; Chazelas, Christophe; Mariaux, Gilles; Vardelle, Armelle

doi:10.1361/105996306x147306

Cited by 93 publications

(69 citation statements)

References 14 publications

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“…For the conditions studied, a reattachment model was not needed in the NLTE model. It is expected that non-equilibrium simulations of the restrike mode will require the use of a reattachment model similar to the one used in the LTE simulations in [10] or the one used in [25].…”

Section: Arc Reattachment Processesmentioning

confidence: 99%

Non-equilibrium modelling of arc plasma torches

Trelles¹,

Heberlein²,

Pfender³

2007

J. Phys. D: Appl. Phys.

160

112

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Abstract.A two-temperature thermal non-equilibrium model is developed and applied to the threedimensional and time-dependent simulation of the flow inside a DC arc plasma torch. A detailed comparison of the results of the non-equilibrium model with those of an equilibrium model is presented. The fluid and electromagnetic equations in both models are approximated numerically in a fully-coupled approach by a variational multi-scale finite element method. In contrast to the equilibrium model, the non-equilibrium model did not need a separate reattachment model to produce an arc reattachment process and to limit the magnitude of the total voltage drop and arc length. The non-equilibrium results show large non-equilibrium regions in the plasma -cold-flow interaction region and close to the anode surface. Marked differences in the arc dynamics, especially in the arc reattachment process, and in the magnitudes of the total voltage drop and outlet temperatures and velocities between the models are observed. The non-equilibrium results show improved agreement with experimental observations.

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Section: Arc Reattachment Processesmentioning

confidence: 99%

Non-equilibrium modelling of arc plasma torches

Trelles¹,

Heberlein²,

Pfender³

2007

J. Phys. D: Appl. Phys.

160

112

View full text Add to dashboard Cite

show abstract

“…Simulation works on plasma arc inside the torch were firstly studied by using two-dimensional (2D) [1][2][3][4][5][6][7] and then extended to three-dimensional (3D) models [8][9][10][11][12][13][14][15][16][17]. For 2D models, the anode arc attachment was calculated based on axisymmetric assumption, which normally leads to the unrealistic result.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional simulation of an argon–hydrogen DC non-transferred arc plasma torch

Guo

Yin

Liao

et al. 2015

International Journal of Heat and Mass Transfer

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“…With computing power improvement, models get more and more sophisticated and close to real conditions thus allowing today the simulation of three-dimensional and unsteady systems with detailed geometry description. Numerous fluid models have been reported in the literature mostly on direct current (DC) arc discharge modeling using Digital Object Identifier high current above 100 A [1], [2] including: free burning arcs [3], [4], transferred arcs [5]- [7] and non-transferred arcs [8]- [11]. Many DC arc plasma torches models have been developed for different applications [12] as: cutting [13], welding [14], deposition and spraying [8]- [11], [15], [16], steelmaking [7], waste disposal [17] and ultra fine particle production [18].…”

Section: Introductionmentioning

confidence: 99%