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

  • Research Paper
  • Coastal and Harbor Engineering
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KSCE Journal of Civil Engineering Aims and scope

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.

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Correspondence to Wei-Haur Lam.

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Lam, WH., Hamill, G., Robinson, D. et al. Analysis of the 3D zone of flow establishment from a ship’s propeller. KSCE J Civ Eng 16, 465–477 (2012). https://doi.org/10.1007/s12205-012-1256-7

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  • DOI: https://doi.org/10.1007/s12205-012-1256-7

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