肥大船型の船尾境界層計測と粘性抵抗の成分評価

概要

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Three-dimensional turbulent boundary layer on several ship hulls, of which the stern forms are changed systematically, is calculated by a simple integral-type prediction method with small crossflow assumption, and is measured by three-hole Pitot tube in a circulating water channel. The viscous resistance components due to streamwise momentum loss in the boundary layer and stern bilge vortices are evaluated by Himeno's method. The usefulness of the estimation method of viscous resistance is examined in stern-form design problem. A change of the frameline shape at stern affects not only the crossflow in the boundary layer and the strength of the longitudinal vortices, but also the streamwise momentum loss. The viscous resistance becomes small by reducing the fullness of stern shoulder.
社団法人日本船舶海洋工学会の論文
1986-06-30