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Influence of a velocity profile & support structure on tidal stream turbine performance

Mason-Jones, Allan, O'Doherty, Daphne Maria, Morris, Ceri E. and O'Doherty, Timothy 2013. Influence of a velocity profile & support structure on tidal stream turbine performance. Renewable Energy 52 , pp. 23-30. 10.1016/j.renene.2012.10.022

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With tidal turbine technology in its infancy prototype devices are likely to be positioned at locations where both the local marine environment and vessel navigation are favourable. However, as marine turbine technology develops toward economic viability there is a propensity for undesirable interactions with local shipping, higher turbulence levels and velocity shear through the water column to occur. The latter high shear could result from positioning the turbine lower in the water column, perhaps due to local shipping requirements. This paper helps to elucidate the performance of the tidal turbine and in particular the blade forces during rotation within a high shear velocity profile. A velocity profile from ADCP measurements was used as an inlet boundary for CFD analysis. The work shows that the presence of a suitably positioned stanchion downstream of the turbine will result in reduced performance characteristics over a complete rotation. However, the amplitude of the characteristics, in particular, the axial loading increases which would require careful design considerations.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Uncontrolled Keywords: CFD; Tidal stream; Blade rotation; Velocity profile; Seabed
Publisher: Elsevier
ISSN: 0960-1481
Last Modified: 15 Dec 2020 12:31

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