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The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines

The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines
The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines
An experimental and theoretical investigation of the flow field around small-scale mesh disk rotor simulators is presented. The downstream wake flow field of the rotor simulators has been observed and measured in the 21m tilting flume at the Chilworth hydraulics laboratory, University of Southampton. The focus of this work is the proximity of flow boundaries (sea bed and surface) to the rotor disks and the constrained nature of the flow. A three-dimensional Eddy-viscosity numerical model based on an established wind turbine wake model has been modified to account for the change in fluid and the presence of a bounding free surface. This work has shown that previous axi-symmetric modeling approaches may not hold for marine current energy technology and a novel approach is required for simulation of the downstream flow field. Such modeling solutions are discussed and resultant simulation results are given. In addition, the presented work has been conducted as part of a UK Government funded project to develop validated numerical modeling tools which can predict the flow onto a marine current turbine within an array. The work feeds into the marine energy program at Southampton to assist developers with layout designs of arrays which are optimally spaced and arranged to achieve the maximum possible energy yield at a given tidal energy site.
0892-7219
021104-[8pp]
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Rawlinson-Smith, R.
f1df0680-e0af-407a-bb18-4381021dc1be
Thomson, M.
df7e3d8d-2934-49c0-8d9c-0134e02c4e0e
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Rawlinson-Smith, R.
f1df0680-e0af-407a-bb18-4381021dc1be
Thomson, M.
df7e3d8d-2934-49c0-8d9c-0134e02c4e0e

Bahaj, A.S., Myers, L.E., Rawlinson-Smith, R. and Thomson, M. (2012) The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines. Journal of Offshore Mechanics and Arctic Engineering, 134 (2), 021104-[8pp]. (doi:10.1115/1.4004523).

Record type: Article

Abstract

An experimental and theoretical investigation of the flow field around small-scale mesh disk rotor simulators is presented. The downstream wake flow field of the rotor simulators has been observed and measured in the 21m tilting flume at the Chilworth hydraulics laboratory, University of Southampton. The focus of this work is the proximity of flow boundaries (sea bed and surface) to the rotor disks and the constrained nature of the flow. A three-dimensional Eddy-viscosity numerical model based on an established wind turbine wake model has been modified to account for the change in fluid and the presence of a bounding free surface. This work has shown that previous axi-symmetric modeling approaches may not hold for marine current energy technology and a novel approach is required for simulation of the downstream flow field. Such modeling solutions are discussed and resultant simulation results are given. In addition, the presented work has been conducted as part of a UK Government funded project to develop validated numerical modeling tools which can predict the flow onto a marine current turbine within an array. The work feeds into the marine energy program at Southampton to assist developers with layout designs of arrays which are optimally spaced and arranged to achieve the maximum possible energy yield at a given tidal energy site.

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e-pub ahead of print date: 6 December 2011
Published date: May 2012
Organisations: Civil Maritime & Env. Eng & Sci Unit

Identifiers

Local EPrints ID: 333564
URI: https://eprints.soton.ac.uk/id/eprint/333564
ISSN: 0892-7219
PURE UUID: 00fed189-1d75-41a7-bd47-d08584f15ad5
ORCID for A.S. Bahaj: ORCID iD orcid.org/0000-0002-0043-6045
ORCID for L.E. Myers: ORCID iD orcid.org/0000-0002-4724-899X

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Date deposited: 06 Mar 2012 12:49
Last modified: 06 Jun 2018 13:20

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Contributors

Author: A.S. Bahaj ORCID iD
Author: L.E. Myers ORCID iD
Author: R. Rawlinson-Smith
Author: M. Thomson

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