3次元乱流境界層第一近似解を用いた公称伴流係数の一試算

概要

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Numerical estimation of nominal wake on a propeller disk has become important for preliminary design of stern hull forms. Numerical calculations of nominal wake coefficient were performed for four ship models by applying the theory of three-dimensional turbulent boundary layer.The assumption has been made in this study that the nominal wake coefficient is composed of the potential and the frictional wake coefficient, and that the wake flow does not include bilge vortices. The potential wake coefficients were calculated from the numerical results of the Hess-Smith method. The frictional wake coefficients were obtained by the application of the first order approximation of three-dimensional turbulent boundary layer.Numerical results of nominal wake coefficient show good agreement with the measured ones, except for the case that strong stern vortices exist in a wake flow, for example for a case of a tanker ship model.
独立行政法人海上技術安全研究所の論文
1982-07-30