Measurement of bursting period and test of surface renewal model in a turbulent boundary layer disturbed by a cylinder

The present study deals with a two-dimensional turbulent boundary layer on a flat plate, disturbed by a cylinder located normal to the flow directionnd parallel to and detached from the plate. The mean bursting period measured in the disturbed boundary layer does not differ much from the corresponding period measured in an undisturbed layer. This period does not vary appreciably with increasing distance from the cylinder, while the skin friction coefficient varies significantly with this distance. The experimental results indicate that the surface renewal model is able to predict the wall shear stress in the present type of complicated turbulent wall flow.