プロペラによる造波の研究

抄録

Particular attentions on the wave pattern resistance of self-propelled ship have been on the increase. Although the wave resistance of screw propellers have been largely studied theoretically, only a few experimental investigations have been reported. The measurement of the waves behind a propeller using the special towing apparatus of propeller in open water, has been performed in the Ship Research Institute. Through the experiment, following subjects are confirmed. 1) The theoretical wave heights of screw propellers represented by sink distribution roughly coincide with the results of measurements. 2) The wave pattern resistance of propeller is proportional to square of the load factor as expected in the theories. 3) The waves behind self-propelled ship models can be roughly treated as the sum of the waves generated by the towed ship and the propeller in open water. 4) It is estimated that the wave resistance of a propeller accounts for about 30 percent of the thrust augmentation.