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


Myers, L.E. and Bahaj, A.S. (2008) The effect of boundary proximity upon the wake structure of horizontal axis marine current turbines. In, 27th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2008), Estoril, Portugal, 16 - 21 Jun 2008. The American Society of Mechanical Engineers.

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Description/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 (seabed 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 modelling approaches may not hold for marine current energy technology and a novel approach is required for simulation of the downstream flow field. Such modelling solutions are discussed and resultant simulation results are given.

This work has been conducted as part of a BERR-funded project to develop a numerical modelling tool which can predict the flow onto a marine current turbine within an array. The work presented in this paper feeds into this project and will eventually assist the layout design of arrays which are optimally spaced and arranged to achieve the maximum possible energy yield at a given tidal energy site.

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: T Technology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: University Structure - Pre August 2011 > School of Civil Engineering and the Environment
ePrint ID: 52810
Date Deposited: 26 Aug 2008
Last Modified: 27 Mar 2014 18:36
Publisher: The American Society of Mechanical Engineers
URI: http://eprints.soton.ac.uk/id/eprint/52810

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