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Progress in Plasma Processing of Materials, 2003

ISBN Imprimir: 978-1-56700-192-1

ISBN En Línea: 978-1-56700-447-2

CRITERION FOR TRANSITION FROM LAMINAR TO TURBULENT FLOWS OF ARGON IN PLASMATRONS

Sinopsis

Numerical simulations of the fully developed flow region in a cylindrical channel of the plasmatron are performed. As the results, temperature and velocity radial distributions, dependences of pressure and voltage gradients on operating parameters of the plasma torch are obtained for the argon arc burning in the laminar gas flow. Special attention was given to define and to calculate criteria for transition from the laminar to the turbulent regime of the gas flow in the fully developed flow region. For this purpose some experimental results of Frind, Damsky [2] and Runstadler [1] were employed. Using these experimental results we have calculated the value of the critical Reynolds number characterizing the onset of the turbulence for the arc flow.
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