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Design and initial testing of a contra-rotating tidal current turbine

Clarke, J.A. and Connor, G. and Grant, A.D. and Johnstone, C.M. (2006) Design and initial testing of a contra-rotating tidal current turbine. In: Proceedings of the World Renewable Energy Congress IX. Pergamon Press. ISBN 00844671

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    Abstract

    A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. High frequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials.

    Item type: Book Section
    ID code: 6596
    Keywords: marine currents, turbines, contra-rotating, model tests, renewable enrgy, power systems, modelling, building simulation, Mechanical engineering and machinery, Building construction, Environmental technology. Sanitary engineering
    Subjects: Technology > Mechanical engineering and machinery
    Technology > Building construction
    Technology > Environmental technology. Sanitary engineering
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 12 Aug 2008
    Last modified: 16 Mar 2012 13:03
    URI: http://strathprints.strath.ac.uk/id/eprint/6596

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