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Progress in Plasma Processing of Materials, 1997

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Study of the Effects of the Induction Plasma Torch Parameters on its Jet Characteristics

M. Rahmane
Plasma Technology Research Center (CRTP), Department of Chemical Engineering, Universite de Sherbrooke, Sherbrooke (Quebec), Canada J1K2R1

Gervais Soucy
Department of Chemical Engineering, Université de Sherbrooke. 2500 Blvd. de l'Université, Sherbrooke, J1K 2R1

Maher I. Boulos
Department of Chemical Engineering University of Sherbrooke, 2500 Blvd. de lUniversite Sherbrooke J1К 2R1, PQ - Canada


Thermal plasma jets, generated by three induction plasma torches of different physical sizes and operated under different input power levels, were characterized in terms of their flow parameters (temperature, velocity, concentration and heat flux profiles) using the enthalpy probe and mass spectrometry techniques as the diagnostic tools. It is shown by this study that when two torches of different size (i.e. plasma confinement tube diameter) are used under the same power level, the jet generated with the smaller tube torch has higher centerline values for the plasma temperature, velocity and local heat flux. Furthermore, these characteristics of plasma jets, when generated by a small scale induction unit, are closely reproduced for larger scale installations, a result that is reassuring when scale-up of induction plasma operations is under consideration.