Detail publikačního výsledku

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

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

Originální název

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

Anglický název

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

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova v angličtině

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

Autoři

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

Vydáno

01.04.2005

ISSN

1093-3611

Periodikum

HIGH TEMPERATURE MATERIAL PROCESSES

Svazek

8

Číslo

2

Stát

Spojené státy americké

Strany od

195

Strany do

205

Strany počet

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",
  year="2005",
  volume="8",
  number="2",
  pages="195--205",
  issn="1093-3611"
}