Publication detail

Performance of water and hybrid stabilized electric arcs: the impact of dependence of radiation losses and plasma density on pressure

J. Jeništa, M. Bartlová, V. Aubrecht

Original Title

Performance of water and hybrid stabilized electric arcs: the impact of dependence of radiation losses and plasma density on pressure

Type

abstract

Language

English

Original Abstract

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 axisymetric numerical model assumes laminar and compressible plasma flow in the state of local thermodynamic equilibrium. The calculation domain include the arc discharge area between the near-cathode region and the outlet nozzle of the plasma torch. Radiation losses from the arc are calculated by the partial characteristics method for atmospheric pressure water and argon-water discharges. Thermal, electrical and fluid-dynamic characteristics of such arcs have been studied for the range of curents 150-600 A under the assumption that radiation losses and plasma density depend linearly on pressure. It was proved that, taking this dependence into account, plasma velocity decrease while power losses from the arc by radiation and radial conduction increase with current. Outlet plasma temperature s as well as electric potential drop remain practically unchanged.

Keywords

arc, torch, hybrid (water) discharge, divergence of radiation flux, radiation losses

Authors

J. Jeništa, M. Bartlová, V. Aubrecht

Released

29. 6. 2006

Location

Praha

Pages from

82

Pages to

82

Pages count

1

BibTex

@misc{BUT60376,
  author="Jiří {Jeništa} and Milada {Bartlová} and Vladimír {Aubrecht}",
  title="Performance of water and hybrid stabilized electric arcs: the impact of dependence of radiation losses and plasma density on pressure",
  year="2006",
  pages="1",
  address="Praha",
  note="abstract"
}