Modelling tidal current turbine wakes using a coupled RANS-BEMT approach as a tool for analysing power capture of arrays of turbines
Modelling tidal current turbine wakes using a coupled RANS-BEMT approach as a tool for analysing power capture of arrays of turbines
The downstream evolution of the wake generated by a rotating tidal energy conversion device influences the performance of the device itself as well as the performance of any downstream device. An improved method is proposed for coupling a blade element momentum theory inner solution for a horizontal axis tidal turbine with an outer domain flow solved using a commercial finite volume computational Fluid Dynamics solver. A mesh sensitivity study is carried out and shows that for wake evolution of distance 10 diameters a high resolution mesh (>10M cells) is required. The importance of swirl is shown in retarding the wake spreading and that the inclusion of a suitable
turbulence intensity term is also required to capture the spread of the near wake. A final section demonstrates the use of such a technique for analysing the energy capture of an array of multiple turbines distributed over 1km2 of seabed. The use of staggered lateral position between longitudinal arrays demonstrates a potential for more effective power capture.
CFD, tidal turbine array, power capture prediction, wake evoluiton, blade element momentum
1300-1307
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f
Banks, J.
3e915107-6d17-4097-8e77-99c40c8c053d
Nicholls-Lee, R.F.
eb65ebff-bdc3-4ea0-8e3d-6f769fc323ed
August 2011
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f
Banks, J.
3e915107-6d17-4097-8e77-99c40c8c053d
Nicholls-Lee, R.F.
eb65ebff-bdc3-4ea0-8e3d-6f769fc323ed
Turnock, S.R., Phillips, A.B., Banks, J. and Nicholls-Lee, R.F.
(2011)
Modelling tidal current turbine wakes using a coupled RANS-BEMT approach as a tool for analysing power capture of arrays of turbines.
Ocean Engineering, 38 (11-12), .
(doi:10.1016/j.oceaneng.2011.05.018).
Abstract
The downstream evolution of the wake generated by a rotating tidal energy conversion device influences the performance of the device itself as well as the performance of any downstream device. An improved method is proposed for coupling a blade element momentum theory inner solution for a horizontal axis tidal turbine with an outer domain flow solved using a commercial finite volume computational Fluid Dynamics solver. A mesh sensitivity study is carried out and shows that for wake evolution of distance 10 diameters a high resolution mesh (>10M cells) is required. The importance of swirl is shown in retarding the wake spreading and that the inclusion of a suitable
turbulence intensity term is also required to capture the spread of the near wake. A final section demonstrates the use of such a technique for analysing the energy capture of an array of multiple turbines distributed over 1km2 of seabed. The use of staggered lateral position between longitudinal arrays demonstrates a potential for more effective power capture.
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Submitted date: 9 December 2009
Accepted/In Press date: 18 May 2011
e-pub ahead of print date: 1 July 2011
Published date: August 2011
Keywords:
CFD, tidal turbine array, power capture prediction, wake evoluiton, blade element momentum
Organisations:
National Oceanography Centre, Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 154885
URI: http://eprints.soton.ac.uk/id/eprint/154885
ISSN: 0029-8018
PURE UUID: e1270d50-8750-43cf-ab8c-e160831e6592
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Date deposited: 26 May 2010 11:29
Last modified: 14 Mar 2024 02:56
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Author:
A.B. Phillips
Author:
R.F. Nicholls-Lee
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