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TVT, 2013, Volume 51, Issue 1, Pages 24–35 (Mi tvt51)  

Plasma Investigations

A criterion of similarity and transition to turbulence for electric arc flows

O. A. Sinkevicha, S. E. Chikunovb

a Moscow Power Engineering Institute, National Research University, Krasnokazarmennaya 14, Moscow, 111250, Russia
b Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya ul. 13-2, Moscow, 127412, Russia

Abstract: A method is suggested for determining the similarity criterion and the criterion of transition of an electric arc flow in a plasmatron channel from a laminar regime to a turbulent one (equivalent Reynolds number) that does not require using any reference temperature. Application of this method to the available experimental data on the transition to turbulence demonstrates its correctness and efficiency. The critical value of the proposed similarity criterion corresponding to the boundary of the transition from a laminar regime to a turbulent one has been revealed. A marginal curve separating the regions of the laminar and turbulent regimes of the plasma flow has been plotted in the space of the operating plasmatron parameters. A phenomenon of a double change of the electric arc flow regime with electric current rise upon constant plasma-forming gas flow rate has been discovered.

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English version:
High Temperature, 2013, 51:1, 17–28

Bibliographic databases:

UDC: 532.517
Received: 14.05.2012

Citation: O. A. Sinkevich, S. E. Chikunov, “A criterion of similarity and transition to turbulence for electric arc flows”, TVT, 51:1 (2013), 24–35; High Temperature, 51:1 (2013), 17–28

Citation in format AMSBIB
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