Analysis of the 3D zone of flow establishment from a ship’s propeller

Wei-Haur Lam, Gerard Hamill, Desmond Robinson, Srinivasan Raghunathan, Yongchen Song

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    In the present study an experimental investigation of the time-averaged velocity and turbulence intensity distributions from a ship’s propeller, in “bollard pull” condition (zero speed of advance), is reported. Previous studies have focused mainly on the velocity profile of not a rotating ship propeller but a plain jet. The velocity profile of a propeller is investigated experimentally in this study.
    The velocity measurements were performed in laboratory by using a Laser Doppler Anemometry (LDA). The measurements demonstrated two-peaked ridges velocity profile with a low velocity core at the centre within the near wake. The two-peaked ridges combined to be one-peaked ridge at 3.68 diameters downstream indicating the end of the zone of flow establishment. The study
    provides useful information from a rotating ship’s propeller rather than a simplified plain jet to researchers investigating flow velocity generated from a propeller and probably resulting local scouring.
    Original languageEnglish
    Pages (from-to)465-477
    Number of pages12
    JournalKSCE Journal of Civil Engineering
    Volume16
    Issue number4
    DOIs
    Publication statusPublished - May 2012

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    Ship propellers
    Propellers
    Flow velocity
    Velocity measurement
    Turbulence
    Lasers

    Cite this

    Lam, Wei-Haur ; Hamill, Gerard ; Robinson, Desmond ; Raghunathan, Srinivasan ; Song, Yongchen. / Analysis of the 3D zone of flow establishment from a ship’s propeller. In: KSCE Journal of Civil Engineering. 2012 ; Vol. 16, No. 4. pp. 465-477.
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    Analysis of the 3D zone of flow establishment from a ship’s propeller. / Lam, Wei-Haur; Hamill, Gerard; Robinson, Desmond; Raghunathan, Srinivasan; Song, Yongchen.

    In: KSCE Journal of Civil Engineering, Vol. 16, No. 4, 05.2012, p. 465-477.

    Research output: Contribution to journalArticle

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    AU - Lam, Wei-Haur

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    AB - In the present study an experimental investigation of the time-averaged velocity and turbulence intensity distributions from a ship’s propeller, in “bollard pull” condition (zero speed of advance), is reported. Previous studies have focused mainly on the velocity profile of not a rotating ship propeller but a plain jet. The velocity profile of a propeller is investigated experimentally in this study.The velocity measurements were performed in laboratory by using a Laser Doppler Anemometry (LDA). The measurements demonstrated two-peaked ridges velocity profile with a low velocity core at the centre within the near wake. The two-peaked ridges combined to be one-peaked ridge at 3.68 diameters downstream indicating the end of the zone of flow establishment. The studyprovides useful information from a rotating ship’s propeller rather than a simplified plain jet to researchers investigating flow velocity generated from a propeller and probably resulting local scouring.

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