Abstract
On the basis of the results of measurements of the mean velocity profile of a 2-D turbulent boundary layer of an incompressible liquid, the previously proposed universal law of velocity defect has been refined. It has been shown that the refined relations are also applicable to nonequilibrium flows in the boundary layer. The proposed method makes it possible to determine the friction coefficient by the known values of the form parameter and the Reynolds number calculated by the displacement thickness of the layer in a wider range of these values compared to the known Ludwieg-Tillman formula.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 5, pp. 834–843, September–October, 2008.
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Lashkov, Y.A., Mikhailov, V.V., Samoilova, N.V. et al. On the application of the universal law of velocity defect to nonequilibrium flows in a turbulent boundary layer. J Eng Phys Thermophy 81, 870–879 (2008). https://doi.org/10.1007/s10891-009-0126-8
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DOI: https://doi.org/10.1007/s10891-009-0126-8