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Realistic evaluation of hull performance for rowing shells, canoes, and kayaks in unsteady flow

Day, Alexander and Campbell, Ian and Clelland, David and Doctors, Lawrence and Cichowicz, Jakub (2011) Realistic evaluation of hull performance for rowing shells, canoes, and kayaks in unsteady flow. Journal of Sports Sciences, 29 (10). 1059–1069. ISSN 0264-0414

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    Abstract

    In this study, we investigated the effect of hull dynamics in shallow water on the hydrodynamic performance of rowing shells as well as canoes and kayaks. An approach was developed to generate data in a towing tank using a test rig capable of reproducing realistic speed profiles. The impact of unsteady shallow-water effects on wave-making resistance was examined via experimental measurements on a benchmark hull. The data generated were used to explore the validity of a computational approach developed to predict unsteady shallow-water wave resistance. Comparison of measured and predicted results showed that the computational approach correctly predicted complex unsteady wave-resistance phenomena at low oscillation frequency and speed, but that total resistance was substantially under-predicted at moderate oscillation frequency and speed. It was postulated that this discrepancy arose from unsteady viscous effects. This was investigated via hot-film measurements for a full-scale single scull in unsteady flow in both towing-tank and field-trial conditions. Results suggested a strong link between acceleration and turbulence and demonstrated that the measured real-world viscous-flow behaviour could be successfully reproduced in the tank. Thus a suitable tank-test approach could provide a reliable guide to hull performance characterization in unsteady flow.

    Item type: Article
    ID code: 35939
    Keywords: rowing shell, canoe, kayak, hull performance, hydrodynamics, unsteady flow, Naval architecture. Shipbuilding. Marine engineering, Orthopedics and Sports Medicine, Physical Therapy, Sports Therapy and Rehabilitation
    Subjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering
    Department: Faculty of Engineering > Naval Architecture and Marine Engineering
    Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 16 Nov 2011 15:25
    Last modified: 27 Mar 2014 20:18
    URI: http://strathprints.strath.ac.uk/id/eprint/35939

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