Abstract
The selfsimilar flow of an incompressible fluid in a turbulent boundary layer is studied at the freestream velocity specified as a power function of the longitudi� nal coordinate. At the adverse pressure when the exponent lies within a certain range depending on the Reynolds number, the problem has two solutions with different values of the boundary layer thickness and the skin friction, which indicates the possibility of hysteresis in the nearseparating flow. The similarity parameter for a flow with a strong adverse pressure is established, and its threshold value at which the solution passes from one branch to the other is cal� culated. At the strong adverse pressure gradient, the boundary layer acquires a tripledeck asymptotic structure: between the outer and wall regions, an inter� mediate gradient sublayer forms in the outer part of which the velocity profile obeys the square root law.
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