Examination of a 2-Equation Model of Turbulence for Calculating the Viscous Flow around Ships

概要

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This paper is concerned with the calculation method of viscous flow around ship based on the assumption of partially parabolic flow and the K-⋴ model of turbulence (Spalding 1975, Muraoka 1979). Inlet conditions for the K-⋴ model of turbulence are improved in comparison with the previous paper (Muraoka 1979) . The validity of K-⋴ model of turbulence is examined through calculating the flow around the axisymmetric bodies and comparing the results with the experiment of Huang et al. (1978). The results give fine agreements with the experiment in not only velocity profile and pressure variation but also turbulent properties when it adopts reasonable conditions at inlet plane. The examination is extended to the flow around ship, and the results are that the agreement of velocity profile between calculation and experiment is better than that in the previous paper and that the turbulent properties seem to represent the phenomena. It can be believed that the 2-equation model of turbulence is more useful tool than any other O- or 1-equation model in considering the turbulence around ships.
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