Publication detail

Radiation in water-vortex stabilized electric arc comparison among different models

JENIŠTA, J. BARTLOVÁ, M. AUBRECHT, V.

Original Title

Radiation in water-vortex stabilized electric arc comparison among different models

Type

journal article - other

Language

English

Original Abstract

The present paper deals with numerical modelling of electric arc stabilized by water vortex. Two-dimensional axisymmetric model includes the arc discharge area between the cathode and the outlet nozzle of the water plasma torch. Thermal, electrical and fluid-dynamic characteristics as well as power losses of such arc has been studied for the range of currents 150-600 A and three different radiation models (net emission coefficient, net emission approach with reabsorption, partial characteristics). It was proved that the amount of energy losses transferred radially from the arc by conduction and radiation range between 70 and 35 % of the input power. Temperature and velocity fields within the discharge are close to each other for the partial characteristics model and for the net emission model with zero reabsorption of radiation. Calculations carried out by the partial characteristics method showed that reabsorption of radiation in arc fringes reaches about 26 % for the studied range of currents.

Key words in English

arc, divergence of radiation flux, partial characteristics, radiation model, reabsorption

Authors

JENIŠTA, J.; BARTLOVÁ, M.; AUBRECHT, V.

RIV year

2005

Released

1. 4. 2005

ISBN

1093-3611

Periodical

High Temperature Material Processes: An International Journal

Year of study

8

Number

2

State

United States of America

Pages from

195

Pages to

205

Pages count

11

BibTex

@article{BUT45708,
  author="Jiří {Jeništa} and Milada {Bartlová} and Vladimír {Aubrecht}",
  title="Radiation in water-vortex stabilized electric arc comparison among different models",
  journal="High Temperature Material Processes: An International Journal",
  year="2005",
  volume="8",
  number="2",
  pages="195--205",
  issn="1093-3611"
}