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Tidal turbine blade selection for optimal performance in an array

Tidal turbine blade selection for optimal performance in an array
Tidal turbine blade selection for optimal performance in an array
In order to maximize tidal energy capture from a specific site free stream devices are situated in arrays. In an array the downstream evolution of the wake generated by a rotating tidal energy conversion device influences the performance of the device itself, the bypass flow to either side as well as the performance of any downstream device. As such it is important to design a turbine that can perform efficiently and effectively in these circumstances. Use of passively adaptive composite blades for horizontal axis tidal turbines has been shown to improve performance in fluctuating inflows. Active adaptation and/or bi-directional hydrofoil sections could be implemented in order to optimize performance throughout the tidal cycle. This paper considers the performance in an array of four free stream turbines implementing standard rigid blades, wholly bi-directional blades, passively adaptive blades and actively adaptive blades. The method used to evaluate the performance of tidal current turbines in arrays couples an inner domain solution of the blade element momentum theory with an outer domain solution of the Reynolds averaged Navier Stokes equations. The annual energy capture of four devices with each blade type in a staggered array is then calculated for a single tidal cycle and compared.
American Society Of Mechanical Engineers (ASME)
Nicholls-Lee, Rachel F.
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Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Boyd, Stephen W.
bcbdefe0-5acf-4d6a-8a16-f4abf7c78b10
Nicholls-Lee, Rachel F.
7844d075-a125-423c-ae65-f42c3c8e6c23
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Boyd, Stephen W.
bcbdefe0-5acf-4d6a-8a16-f4abf7c78b10

Nicholls-Lee, Rachel F., Turnock, Stephen R. and Boyd, Stephen W. (2011) Tidal turbine blade selection for optimal performance in an array. In Proceedings of the 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011), June 19-24, 2011, Rotterdam, The Netherlands. American Society Of Mechanical Engineers (ASME). 9 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In order to maximize tidal energy capture from a specific site free stream devices are situated in arrays. In an array the downstream evolution of the wake generated by a rotating tidal energy conversion device influences the performance of the device itself, the bypass flow to either side as well as the performance of any downstream device. As such it is important to design a turbine that can perform efficiently and effectively in these circumstances. Use of passively adaptive composite blades for horizontal axis tidal turbines has been shown to improve performance in fluctuating inflows. Active adaptation and/or bi-directional hydrofoil sections could be implemented in order to optimize performance throughout the tidal cycle. This paper considers the performance in an array of four free stream turbines implementing standard rigid blades, wholly bi-directional blades, passively adaptive blades and actively adaptive blades. The method used to evaluate the performance of tidal current turbines in arrays couples an inner domain solution of the blade element momentum theory with an outer domain solution of the Reynolds averaged Navier Stokes equations. The annual energy capture of four devices with each blade type in a staggered array is then calculated for a single tidal cycle and compared.

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More information

Published date: 2011
Additional Information: OMAE2011-49943
Venue - Dates: 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011), Rotterdam, Netherlands, 2011-06-18 - 2011-06-23
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 192415
URI: http://eprints.soton.ac.uk/id/eprint/192415
PURE UUID: a236c8a4-1244-4240-aa84-8c24ac56ba7e
ORCID for Stephen R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 04 Jul 2011 14:20
Last modified: 08 Jan 2022 02:34

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Contributors

Author: Rachel F. Nicholls-Lee
Author: Stephen W. Boyd

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