A two-frame PIV (particle image velocimetry) technique is used to investigate the wake characteristics behind a marine propeller with 4 blades at high Reynolds number. For each of 9 different blade phases from 0 degree to 80 degree, 150 instantaneous velocity fields are measured. They are ensemble averaged to study the spatial evolution of the propeller wake in the region ranging from the trailing edge to one propeller diameter (D) downstream location. The phase-averaged mean velocity shows that the trailing vorticity is related to radial velocity jump, and the viscous wake is affected by boundary layers developed on the blade surfaces and centrifugal force. Both Galilean decomposition method and vortex identification method using swirling strength calculation are very useful for the study of vortex behaviors in the propeller wake region. The slipstream contraction occurs in the near-wake region up to about X/D=0.53 downstream. Thereafter, unstable oscillation occurs because of the reduction of interaction between the tip vortex and the wake sheet behind the maximum contraction point.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Analysis of wake behind a rotating propeller using PIV technique in a cavitation tunnel


    Weitere Titelangaben:

    Berechnung des Nachstroms hinter einem sich drehenden Propeller unter Verwendung der Teilchenabbildgeschwindigkeitsmessung in einem Kavitationstunnel


    Beteiligte:
    Paik, Bu-Geun (Autor:in) / Kim, Jin (Autor:in) / Park, Young-Ha (Autor:in) / Kim, Ki-Sup (Autor:in) / Yu, Kwon-Kyu (Autor:in)

    Erschienen in:

    Ocean Engineering ; 34 , 3-4 ; 594-604


    Erscheinungsdatum :

    2007


    Format / Umfang :

    11 Seiten, 15 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Influence of wake on propeller loading and cavitation

    van Gent, W. / van Oossanen, P. | IOS Press | 1973


    Reducing Drag and Propeller Cavitation by Improving Vessel Wake

    Ali, B. / Popa, I. / Bejan, M. et al. | British Library Conference Proceedings | 2010


    Reducing Drag and Propeller Cavitation by Improving Vessel Wake

    Ali, B. / Popa, I. / Bejan, M. et al. | British Library Conference Proceedings | 2010


    Propeller Near Wake Analysis Using LES With a Rotating Mesh

    Bensow, R.E. / Liefvendahl, M. / Wikstrom, N. et al. | British Library Conference Proceedings | 2007