Abstract

A method for calculating the ship friction resistancę based on tbe Zazurca's proposal [1] was developed. The proposal deals mainly with a simple transformation of the actual ship form into a body of revolution for which characteristics of the potential flow and the boundary layer were calculated. Algorithms and computer programs were elaborated. Based on these programs systematic calculations were performed of the ship frictional resistance for about eighty ship forms for which results of model resistance tests were available. The ship forms used embrace a wide range of fullness. Calculations showed evidences of boundary layer separation, viz for some forms of larger fullness the velocity of the potential flow and the shear stress reached the zero value at some distance from the trailing edge. The distance changed in a systematic way with the ship form parameters.