キャビテーションの発生したプロペラによる船尾変動圧力について : その基礎実験と軽減対策

概要

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It is well known that the unsteady cavitation induced by a propeller working in a non-uniform flow increases remarkably the pressure fluctuations on a hull surface above a propeller.Theoretical and experimental studies for estimating the pressure fluctuation under the unsteady cavitating condition are not a little reported.From the fact that marked variation in cavity volume on a propeller blade causes large pressure fluctuations, it is firstly needed to know the cavity geometry. Therefore, in this paper, the thickness of cavity on a blade were measured by the two methods, that is laser scattering and pin methods.Then, the calculated pressure fluctuations taking account of the measured cavity volume are compared with measured values and an availability of the calculation method proposed by Huse is discussed.Finally, examples of the experiments which were performed for the purpose of reduction of pressure fluctuations in using the tip unloaded propeller are presented.
独立行政法人海上技術安全研究所の論文
1982-01-30