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Investigation into wave-current interactions in marine current turbines

Barltrop, N. and Varyani, K.S. and Grant, A.D. and Clelland, D. and Pham, X.P. (2007) Investigation into wave-current interactions in marine current turbines. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 221 (2). pp. 233-242. ISSN 0957-6509

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Abstract

The paper looks at the use of blade element-momentum theory for predicting the torque and thrust on a marine current turbine and the results of wave tank tests using a 400 mm-diameter rotor model. To include the effects of waves, linear wave theory particle velocities and accelerations were integrated into the mathematical model. Comparison with test data shows a good agreement which implies that the theory can be effective in analysing the wave-current interactions in marine current turbines. The paper also carried out parametric studies into related parameters, which include wave height, wave frequency, and tip-speed ratio. The interaction of waves with the current may increase or decrease the torque and hence power output of the turbine. The paper also explains the selection and manufacture of the rotor and the experimental setup.