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

článek v časopise - ostatní, Jost

angličtina

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.

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

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

29. 6. 2006

0011-4626

Czechoslovak Journal of Physics

56

Suppl. B

Česká republika

B1224

7