Abstract: | The combined effect of the turbulence intensity , the turbulence scaleL, and the Reynolds number Re** on the surface friction coefficientc
f
in a turbulent boundary layer is studied. The dependence of the relative friction increment on the equivalent turbulence level cq, which takes into account the simultaneous variation in ,L and Re**, is determined. The threshold value cq
* below which the value ofc
f
does not depend on cq is found.Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 2, pp. 65–75, March–April, 1995. |