Experimental results and calculating method concerning transitional and turbulent boundary layers in unsteady flow

A turbulent boundary layer developing in an oscillating external flow is experimentally studied. The periodic component and the turbulent fluctuation of the velocity are analyzed separately with the aid of a statistical treatment of data from hot wire anemometers. A numerical method for solving the local equations by using a mixing length scheme or a transport equation model is presented. An integral prediction method is also used. Questions involving separation or the occurrence of singularities in the boundary layer calculation for cases of an imposed external velocity are approached by using the integral method.