Detail publikace

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

JENIŠTA, J. BARTLOVÁ, M. AUBRECHT, V.

Originální název

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

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 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.

Klíčová slova

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

Autoři

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

Vydáno

29. 6. 2006

ISSN

0011-4626

Periodikum

Czechoslovak Journal of Physics

Ročník

56

Číslo

Suppl. B

Stát

Česká republika

Strany od

B1224

Strany počet

7