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Experimental study on a model azimuthing podded propulsor in ice

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Abstract

The objective of this study was to investigate the performance of a model azimuthing podded propulsor in ice-covered water. Model tests were carried out with two different depths of cut into the ice (15 and 35 mm), two different ice conditions (presawn and pack ice conditions), and four different azimuthing angles. The depth of cut is the maximum penetration depth of the propeller blade into the ice block. The 0.3-m-diameter model propeller was operated in a continuous ice milling condition. Ice loads were measured by several sensors which were installed in various positions on the model. Six one-axis pancake-style load cells on the top of the model measured the global loads and two six-component dynamometers were installed on the shaft to measure the shaft loads. One six-component dynamometer was attached to the one of the propeller blades inside the hub to measure the blade loads. The pod unit and propeller performance in ice are presented. Ice-related loads, which were obtained when the blade was inside the ice block, are introduced and discussed. During the propeller–ice interaction, a blade can experience the path generated by the previous blade, which is called the shadowing effect. The effects of shadowing, depth of cut, azimuthing angle, and advance coefficient on propulsor performance are presented and discussed.

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Acknowledgments

This study on podded propellers was a joint project between Transport Canada and the National Research Council of Canada and we thank Victor Santos-Pedro, Director of Design, Equipment and Boating Safety, Marine Safety, Transport Canada, for continued support of our research. We would also like to acknowledge the financial and in-kind support for the research provided by the Korea Research Foundation Grant (KRF-2004-042-D00236), the Advanced Ship Engineering Research Center in Pusan National University, and the Natural Sciences and Engineering Research Council of Canada. Special thanks are extended to the members of the National Research Council of Canada’s Institute for Ocean Technology for their assistance in various stages of this project.

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Authors and Affiliations

  1. Institute for Ocean Technology, National Research Council Canada, St John’s, NL, A1B 3T5, Canada

    Jungyong Wang, Ayhan Akinturk & Stephen J. Jones

  2. Australian Maritime College, P.O. Box 986, Launceston, TAS, 7250, Australia

    Neil Bose

  3. Daedeok Ship R&D Centre, Samsung Ship Model Basin, Munji-dong, Yusung-ku, Daejeon, 305-308, South Korea

    Yun Young Song

  4. Department of Naval Architecture and Ocean Engineering, Pusan National University, 30 Changjeon-dong, Kumjeng-ku, Busan, 609-735, South Korea

    Ho Hwan Chun & Moon Chan Kim

Authors
  1. Jungyong Wang
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  2. Ayhan Akinturk
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  3. Neil Bose
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  4. Stephen J. Jones
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  5. Yun Young Song
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  6. Ho Hwan Chun
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  7. Moon Chan Kim
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Correspondence to Jungyong Wang.

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Wang, J., Akinturk, A., Bose, N. et al. Experimental study on a model azimuthing podded propulsor in ice. J Mar Sci Technol 13, 244–255 (2008). https://doi.org/10.1007/s00773-008-0024-3

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  • DOI: https://doi.org/10.1007/s00773-008-0024-3

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