Distribution of Wall Shear Stress and Cross Flow in Three-Dimensional Turbulent Boundary Layer on Ship Hull

Abstract

Some measurements and theoretical considerations are made concerning the skin friction vectors and the velocity distributions in the three-dimensional turbulent boundary layers on ship models. The results of the measurements of the skin friction on the ship models show fairly good agreement with the boundary layer calculations. The limiting streamlines derived from the directions of the skin friction vectors on the hull and also observed using the oil film technique express that the three-dimensional separation at the stern of model belongs to the so-called open type. The velocity component measured, normal to the wall varies monotonously near the separation and attachment line. The cross plane flow near the stern calculated by the boundary layer theory has a similar tendency with that of the bilge vortices.