The turbulent boundary layer with suction or injection

Abstract

Summary. This report considers the turbulent boundary layer with distributed suction or injection applied normally through the surface. A bilogarithmic law of the wall is established analogous to the logarithmic law for impervious surfaces. Coles\\' wake hypothesis is extended to the transpiration layer and verified experimentally. The wall boundary condition is discussed briefly and possible effects of surface irregularity are examined. Finally the overall picture of the turbulent transpiration layer is discussed. It is considered that this report provides an acceptable framework for the evolution of a complete theory.