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TsAGI Science Journal

ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2014011021
pages 807-820

ABOUT THE CALCULATION OF THE SKIN FRICTION COEFFICIENT OF THE TURBULENT BOUNDARY LAYER. THE RELAMINARIZATION CRITERION FOR THE LAYER

Vladimir Victorovich Mikhailov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia
Nina Veniaminovna Samoilova
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia

RÉSUMÉ

The formula relating the local skin friction coefficient of the two-dimensional boundary layer of an incompressible fluid to the integral layer characteristics is obtained using the modified Coles law of the wake. Because it is in agreement with the well-known Ludwieg−Tillmann formula, this relationship has a larger range of applicability. The criterion for the beginning of relaminarization in the developed turbulent flow in the boundary layer is proposed.


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