Improved Hydrodynamic Basis for Design and Analysis of Tip-fin Propellers

  • Krishnaswamy, Paddy (Project Manager)

    Project Details

    Description

    The search for propellers with as high efficiency as possible and at the same time low noise and vibration levels and good cavitation properties has led to the development of propellers with unconventional geometry. One such propeller is the tip-fin propeller. The basic guidelines that characterize the tip-fin propeller are that the tip fin is integrated in the blade by a curved transition area ending in the tip fin and
    furthermore, the tip fin points towards the suction side. There are several difficulties associated with the propeller flow of which the problem of cavitation will be considered in great detail.
    With the increased demand for higher propeller loadings and higher efficiency the phenomenon of propeller cavitation is often unavoidable. This causes severe noise and vibration problems on ships. In the case of the tip-fin propeller experimental results have shown that the concave region on the suction side is
    particularly sensitive to cavitation. It is the aim of this project to model the cavitation phenomena related to the tip-fin propeller. This will include the prediction and description of the different types of cavitation (sheet and bubble cavitation). The required theory and software will initially be developed for a two-dimensional profile and
    subsequently extended to deal with three-dimensional, unsteady propeller
    cavitation.
    StatusFinished
    Effective start/end date01/10/199730/09/2000

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