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Velocity distributions in a gaseous plasma: I. Derivation of flow types within a helium plasma
Author(s) -
Meubus P.,
Parent J. R.
Publication year - 1969
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450470611
Subject(s) - helium , plasma , laminar flow , mechanics , turbulence , volumetric flow rate , atomic physics , jet (fluid) , thermodynamics , physics , materials science , chemistry , nuclear physics
Velocity distributions in a plasma jet are generally determined by means of direct methods which are liable to alter the medium, especially at very high temperatures. A gas flow model is proposed, which is worked out from the luminous profile of a helium plasma jet, such as viewed through a dense orange glass filter. The knowledge of the luminous profile equation, temperature distribution, gas flow rate and energy balance completely determine the velocity distribution in the plasma. Boundary conditions lead, in certain cases, to the concept of an axial turbulent core. The helium plasma was operated at 27 kW, with a gas flow rate of 7.2 g/minute. The jet was issuing into an atmosphere kept at 300 mm Hg in order to favor conditions leading to laminar flow.