造波抵抗に対する側壁影響について

概要

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With special interests to small experimental tank works, we have investigated the tankside wall effects on wave resistance of models. Applying the wave-making theory, we have carried out some numerical works for the series of mathematical models in the following cases. T/L=0.05,0.10,0.15,0.20,∞ ; b/L=1/4,3/8,1/2,3/4,1,1.5,2,∞ ; F=V/√<Lg>=0.218〜0.707,where L=ship length, T=ship draft, b=water width, V=ship speed. Finally, making use of the image method, we have made towing experiments with single, double and triple models of T/L=0.10. The model length L and tank water width b being 2.333m and 3.500m, the corresponding ratio b/L is 3/2,3/4,and 1/2 respectively. Comparing the experimental results with theory, we find, unexpectedly large discrepancies that the side-wall effects are more remarkable with the experiments, even in consideration of skin friction augmentations, which may be roughly estimated as 4 and 10 percentages in case of b/L=3/4 and 1/2.
社団法人日本船舶海洋工学会の論文