On the Free-Surface Shear Flow related to Bow Wave-Breaking of Full Ship Models

概要

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Bow wave breaking phenomena around full ship models are studied by velocity field measurements and by a flow visualization technique. By use of dye particles placed in front of the bow of full form, the authors find that there exists a shear flow on the free surface. Then it is shown that the shear flow has a significant effect on the formation of breaking bow waves. Namely an artificially strengthened shear flow affects considerably to the extent of breaking of bow waves and as a result, the resistance of ship model is increased. On the contrary, by the acceleration of the free surface toward ship model, i.e. by the reduction of shear, wave breaking' Phenomenon and ship resistance are reduced. Thus, the authors consider that the bow 1'vave breaking is- regarded as a kind of separation at the free surface in front of the full bow forms.
社団法人日本船舶海洋工学会の論文