ダクトプロペラ装備船の軸系ねじり振動について
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概要
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The pitch, blade shape, etc. of ducted propeller are considerably different from those of conventional propeller. Combined with duct, such a special shape of propeller is assumed to have some effects on the torsional vibration of shafting on diesel ship. To investigate this matter, we have carried out the measurement on actual ships and have found the following.<BR>(1) The formulas for propeller entrained water calculation by Burill and Robson and also by Takaira and Yano are applicable to ducted propeller.<BR>(2) The damping effect on torsional vibration in ducted propeller is larger than that in conventional propeller.