A New Component of Viscous Resistance of Ships

概要

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The findings on a new component of viscous resistance are outlined. From the experimental study and some theoretical appoaches it has been pointed out that(1) The new component of resistance is associated with the expenditure of energy in generating turbulence due to the breakdown of waves at the bow of ships and governed by Froude's law.(2) In particular at ballast condition of fuller ships the component occupies most of the socalled wave resistance derived by the usual three-dimensional extrapolation method such as Hughes' method. On the other hand the wave resistance derived from the measured wave patterns is quite small.(3) The component can be derived from the measured head loss which apears near the free surface and outside the usual frictional wake belt.
社団法人日本船舶海洋工学会の論文