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PIV analysis of flow around a container ship model with a rotating propeller

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Abstract

The flow characteristics of the propeller wake behind a container ship model with a rotating propeller were investigated using a two-frame PIV (Particle Image Velocimetry) technique. Ensemble-averaged mean velocity fields were measured at four different blade phases and ensemble-averaged to investigate the flow structure in the near-wake region. The mean velocity fields in longitudinal planes show that a velocity deficit is formed in the regions near the blade tips and hub. As the flow develops in the downstream direction, the trailing vortices formed behind the propeller hub move upward slightly due to the presence of the hull wake and free surface. Interaction between the bilge vortices and the incoming flow around the hull causes the flow structure to be asymmetric. Contour plots of the vorticity give information on the radial distribution of the loading on the blades. The radial velocity profiles fluctuate to a greater extent under the heavy (J=0.59) and light loading (J=0.88) conditions than under the design loading condition (J=0.72). The turbulence intensity has large values around the tip and trailing vortices. As the wake develops in the downstream direction, the strength of the vorticity diminishes and the turbulence intensity increases due to turbulent diffusion and active mixing between the tip vortices and the adjacent wake flow.

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Acknowledgements

The present work was supported by the National Research Laboratory Program of Ministry of Science and Technology (MOST) of Korea.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Pohang University of Science and Technology, San 31, Hyo-Ja Dong, 790-784, Pohang, Korea

    Bu Geun Paik, Choung Mook Lee & Sang Joon Lee

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  1. Bu Geun Paik
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  2. Choung Mook Lee
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  3. Sang Joon Lee
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Correspondence to Sang Joon Lee.

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Paik, B.G., Lee, C.M. & Lee, S.J. PIV analysis of flow around a container ship model with a rotating propeller. Exp Fluids 36, 833–846 (2004). https://doi.org/10.1007/s00348-003-0765-z

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  • DOI: https://doi.org/10.1007/s00348-003-0765-z

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