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JENIŠTA, J. BARTLOVÁ, M. AUBRECHT, V.
Originální název
Properties of arc discharge with hybrid stabilization
Typ
článek v časopise - ostatní, Jost
Jazyk
angličtina
Originální abstrakt
Processes in the worldwide unique type of thermal plasma generator with water vortex stabilization and combined stabilization of arc by argon flow and water vortex have been numerically studied. Two-dimensional axisymmetric numerical model assumes laminar and compressible plasma flow in the state of local thermodynamic equilibrium. Radiation losses from the arc are involved by the partial characteristics methods for atmospheric pressure water and argon-water discharges. The aim of this paper is to study the impact of different physical and numerical assumptions on the overall arc performance. The following problems have been studied: 1) the change of arc parameters with the density of numerical grid, 2) the influence of the first and second order density differencing on the calculated results, 3) the impact of pressure-dependence of radiation losses and plasma density on arc parameters. Numerical experiments proved that results obtained with the grids denser than 60 x 40 points in the axial and radial directions respectively are practically grid-independent. Results carried out with the more accurate second order density differencing at the main control volumes faces are within 7 % of our previously published results. The dependence of radiation losses and plasma density on pressure influences mainly plasma velocity and power losses from the arcs.
Klíčová slova
arc, hybrid (water) discharge, partial characteristics, upwind, grid
Autoři
JENIŠTA, J.; BARTLOVÁ, M.; AUBRECHT, V.
Vydáno
1. 5. 2006
ISSN
1093-3611
Periodikum
High Temperature Material Processes: An International Journal
Ročník
10
Číslo
4
Stát
Spojené státy americké
Strany od
501
Strany do
513
Strany počet
13
BibTex
@article{BUT43625, author="Jiří {Jeništa} and Milada {Bartlová} and Vladimír {Aubrecht}", title="Properties of arc discharge with hybrid stabilization", journal="High Temperature Material Processes: An International Journal", year="2006", volume="10", number="4", pages="13", issn="1093-3611" }