Wave-current interactions in marine current turbines

Barltrop, N. and Grant, A.D. and Varyani, K.S. 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.

Author(s):Barltrop, N., Grant, A.D., Varyani, K.S. 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:12 Jul 2019 02:41
URI:https://strathprints.strath.ac.uk/id/eprint/9840
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