On the Optimization of the Aft-Part of Fine Hull Forms (Third Report)

概要

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To clarify the physical mechanism of the interaction between hull and propeller many kinds of experiments have been carried out with geosim models of 2.5m and 10m. They are measurement of hull surface pressure and wave height on towing and selfpropelling conditions and partly on T=0 condition, measurement of waves generated by a propeller and measurement of thrust, torque and waves when propeller-position is shifted aftward. The obtained results can partly be explained by the theoretical calculation of the previous paper; however, it is also clear that much more complicated phenomena of interaction exist. Advantages and disadvantages of the potential theory are discussed. The increment of resistance due to the action of a propeller (thrust deduction) is not independent of advance speed, because it is influenced by the interaction of waves. The free surface flow and the effect of wake distribution must be considered in addition to Lagalley's force for the improvement of our understanding of the interaction.
社団法人日本船舶海洋工学会の論文
1981-06-30