Wave-current interactions in marine current turbines

Barltrop, N. and Varyani, K.S. and Grant, A.D. and Clelland, D and Pham, X.P. (2006) Wave-current interactions in marine current turbines. Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 220 (4). pp. 195-203. ISSN 1475-0902

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    Abstract

    The influence of waves on the dynamic properties of bending moments at the root of blades of tidal stream vertical-axis rotors is reported. Blade element-momentum theory for wind turbines is combined with linear wave theory and used to analyze this influence. Experiments were carried out with a 350 mm diameter rotor to validate the simulation and the comparison shows the ability of the theoretical approach to predict the blade root bending moments. It can be concluded that, in steep waves, linear theory underestimates the dynamic behaviour of bending moments. However, in long waves, linear theory works well. Bending moments at roots of rotor blades fluctuate with significant amplitudes (as much as 50 per cent of mean value for out-of-plane bending moment and 100 per cent of mean value for in-plane bending moment), which will be important for design of tidal stream rotors.

    Creators(s): Barltrop, N., Varyani, K.S., Grant, A.D., Clelland, D ORCID logoORCID: https://orcid.org/0000-0002-5540-5182 and Pham, X.P.;
    Item type:Article
    ID code:9840
    Keywords:tidal stream , linear blade element-momentum theory , wave-current interaction, current turbine, Naval Science and Military Science, Mechanical Engineering, Ocean Engineering
    Subjects:Naval Science
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Faculty of Engineering > Mechanical and Aerospace Engineering
    Depositing user: Strathprints Administrator
    Date deposited:03 Nov 2011 12:56
    Last modified:01 Jan 2021 08:46
    URI:https://strathprints.strath.ac.uk/id/eprint/9840
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