Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines
Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines
The actuator disc is a useful method for parameterising a tidal stream turbine in a solution of the Reynolds-averaged Navier–Stokes equations. An actuator disc is a region where similar forces are applied to a flow as would be imposed by a turbine. It is useful where large-scale flow characteristics are of interest, such as the far wake, free surface effects, or installation of multi-turbine arrays. This study compares the characteristics of the wake of an actuator disc, modelled using a steady solution to the Reynolds-averaged Navier–Stokes (RANS) simulated equations, with the k– shear stress transport (SST) turbulence model, to experimental data measured behind discs of various porosities. The results show that the wake of the experimental and modelled discs has similar characteristics; in both model and experiment, velocity in the near wake decreased as thrust coefficient increased. However, the near wake region in the experiment was shorter than simulated in the model because of near wake turbulence. This, combined with lower ambient turbulence levels in the model, meant that the far wake recovered further downstream, while showing similar overall trends in velocity and turbulence intensity.
613-627
Harrison, M.E.
553f4973-0237-422c-8656-72e3a249f0dc
Batten, W.M.J.
8a6a68c7-b614-4f62-9d56-54eb38a45a94
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
1 November 2010
Harrison, M.E.
553f4973-0237-422c-8656-72e3a249f0dc
Batten, W.M.J.
8a6a68c7-b614-4f62-9d56-54eb38a45a94
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Harrison, M.E., Batten, W.M.J., Myers, L.E. and Bahaj, A.S.
(2010)
Comparison between CFD simulations and experiments for predicting the far wake of horizontal axis tidal turbines.
IET Renewable Power Generation, 4 (6), .
(doi:10.1049/iet-rpg.2009.0193).
Abstract
The actuator disc is a useful method for parameterising a tidal stream turbine in a solution of the Reynolds-averaged Navier–Stokes equations. An actuator disc is a region where similar forces are applied to a flow as would be imposed by a turbine. It is useful where large-scale flow characteristics are of interest, such as the far wake, free surface effects, or installation of multi-turbine arrays. This study compares the characteristics of the wake of an actuator disc, modelled using a steady solution to the Reynolds-averaged Navier–Stokes (RANS) simulated equations, with the k– shear stress transport (SST) turbulence model, to experimental data measured behind discs of various porosities. The results show that the wake of the experimental and modelled discs has similar characteristics; in both model and experiment, velocity in the near wake decreased as thrust coefficient increased. However, the near wake region in the experiment was shorter than simulated in the model because of near wake turbulence. This, combined with lower ambient turbulence levels in the model, meant that the far wake recovered further downstream, while showing similar overall trends in velocity and turbulence intensity.
Text
Harrison_2010.pdf
- Version of Record
Restricted to Repository staff only
Request a copy
More information
Published date: 1 November 2010
Organisations:
Energy & Climate Change Group
Identifiers
Local EPrints ID: 334092
URI: http://eprints.soton.ac.uk/id/eprint/334092
ISSN: 1752-1416
PURE UUID: f592ee95-27a6-411a-b633-2275e40d6834
Catalogue record
Date deposited: 06 Mar 2012 16:55
Last modified: 15 Mar 2024 03:12
Export record
Altmetrics
Contributors
Author:
M.E. Harrison
Author:
W.M.J. Batten
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
