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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. (2007) Design and initial testing of a contra-rotating tidal current turbine. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 221 (2). pp. 171-179. ISSN 0957-6509

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    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: Article
    ID code: 40528
    Keywords: marine currents, turbines, contra-rotating, model tests, renewable enrgy, power systems, modelling, building simulation, design, initial testing, tidal current, turbine , 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
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      Depositing user: Pure Administrator
      Date Deposited: 24 Jul 2012 14:12
      Last modified: 20 Jul 2013 04:48

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