Abstract
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.
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