COMPUTATION OF GAS FLOW RATE THROUGH THE PLASMATORCH CHANNEL BY PRESSURE DIFFERENCE
V.A. DOSTOVALOV and B.A. YURYUKOV*
Far-East State Technical University, Vladivostok, Russia
*Institute of the Problems of Material Studies, NAS of Ukraine, Kiev
Abstract
he technique is proposed to compute the gas flow rate in a plasmatorch by the difference in pressure over the channel length in those cases when it is impossible to define the flow rate with other methods, for example, in a plasmatorch with atmospheric air suction. The results of calculation of stream parameters in the plasmatorch channel for the laminar and turbulent flow regimes are approximated with simple formulas. A method is suggested to estimate a point of the transition from the laminar to turbulent flow with an electric arc, and a relation for critical Reynolds number is obtained. P. 561-567
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