The problem of the tip vortex cavitation inception is a matter of increasing interest. Main reason for this is that, despite being, generally, not erosive and not influent on the propeller mechanical characteristics, the cavitating vortex dynamics may play a significant role in the propeller radiated noise. In the present work, a thorough analysis of the capability of a commercial RANS solver in conjunction with the Schnerr–Sauer cavitation model to predict the tip and the tip leakage vortex cavitation (with particular attention to their inception) for a conventional and two ducted propellers respectively, is presented. Considering at first a conventional CP propeller, a comprehensive analysis of the effect of the various parameters (e.g. mesh characteristics, number and size of nuclei in the numerical calculations) on the computed results is reported, together with a comparison with the experimental measurements carried out in a cavitation tunnel. This analysis allows to stress the capabilities of RANS computations to correctly predict tip phenomena and to provide guidelines in order to obtain reliable numerical results, having in mind the necessity of a compromise between calculation accuracy and computational time, essential in the case of a systematic application of the presented approach for design purposes. Furthermore the calculations are repeated also for two propellers in decelerating duct and the satisfactory results obtained demonstrate the capability of the proposed approach to correctly rank two slightly different geometries also for this more complex and challenging case.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A study on the numerical prediction of propellers cavitating tip vortex


    Beteiligte:
    Gaggero, Stefano (Autor:in) / Tani, Giorgio (Autor:in) / Viviani, Michele (Autor:in) / Conti, Francesco (Autor:in)

    Erschienen in:

    Ocean Engineering ; 92 ; 137-161


    Erscheinungsdatum :

    2014


    Format / Umfang :

    25 Seiten, 32 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Numerical prediction of tonal noise for non-cavitating propellers in effective wake

    Rao, Zhi-Qiang / Yang, Chen-Jun | Taylor & Francis Verlag | 2018


    Numerical Analysis of Cavitating Propellers Including Viscous Flow Effects

    Salvatore, F. / Esposito, P. G. | British Library Conference Proceedings | 2001


    Radiated noise of cavitating propellers

    Noordzij, L. / Oosanen, P. van | Tema Archiv | 1979


    Hydroacoustic design aspects of cavitating propellers

    Oossanen, P.van / Stuurman, A.M. | Tema Archiv | 1978


    Numerical Calculation of Non-Cavitating Performances of Super Cavitation Propellers by Vortex Lattice Lifting Surface Method

    Ikehata, M. / Yamasaki, H. / Chinese Society of Naval Architecture and Marine Engineering| SNAME| ASME | British Library Conference Proceedings | 1992