Arc plasma jets of a nontransferred plasma torch
- Seoul National Univ. (Korea, Republic of). Dept. of Nuclear Engineering
The dc plasma torches have been widely used as clean plasma sources for plasma processings such as plasma spraying and synthesis. The plasma flow of a nontransferred plasma torch used for thermal plasma processings is produced by the arc-gas interactions between a cathode tip and an anode nozzle and expands as a jet through the nozzle. In this work, numerically calculated images of the arc plasma characteristics are found over the entire plasma region, including both an arc-gas interacting region inside the torch and a jet expanding region outside the torch. A numerical model used assumes a local thermodynamic equilibrium (LTE) with near-electrode phenomena and compressible flow effects. The computational system is described by a two-dimensional (2-D) axisymmetric model which is solved for plasma temperature and velocity by a control volume approach with the modified SIMPLER algorithm in a real torch geometry.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 244932
- Journal Information:
- IEEE Transactions on Plasma Science, Vol. 24, Issue 1; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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