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: This report presents refinements of a previous momentum-integral method for calculating three-dimensional turbulent boundary layers on ship hulls. In particular the following refinements are made: the small crossflow assumption is removed; numerical calculation of the double model potential flow replaces the slender body potential flow; a more general and versatile orthogonal coordinate system is used in place of the streamline surface coordinate system; and finally, an improved numerical method is used for solving the momentum-integral boundary-layer equations. It is shown that the boundary layer calculation method, developed here, can be used to calculate certain boundary layer parameters, such as boundary layer thickness or skin friction, with fair accuracy cover a large portion of hulls that maintain unseparated flow. The surface coordinate system can also be used in other methods for calculating the boundary layer. (Author)

An integral prediction method for three-dimensional turbulent boundary layers on ships / by Christian von Kerczek, Thomas J. Langan.