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Turbulence and its effects on the thrust and wake of a porous disc rotor simulator

Turbulence and its effects on the thrust and wake of a porous disc rotor simulator
Turbulence and its effects on the thrust and wake of a porous disc rotor simulator
Marine current turbines are still in their infancy with many devices at the development stage. Studies are often carried out using small scale laboratory experiments in flumes, towing tanks and numerical simulations to investigate the wakes and performance of scale marine current turbines. However, the characteristics of the inflow turbulence used in such studies is often not fully considered. Tidal flows are highly turbulent with a broad range of eddy sizes and intensities. So differences are expected when predictions of array energy yields are made from towing tanks studies with zero turbulence. This work considers the effects of turbulent eddy size on the thrust and wake behind a porous disc rotor simulator commonly used to represent marine current turbines in small scale experiments. The results show an increase in thrust coefficient with increasing length scale and a corresponding reduction in velocity deficit in the wake. These findings have implications to array special planning and hence energy yields.
Blackmore, T.
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Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Blackmore, T.
05087c45-a814-44d8-bac5-1670f9a60abd
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37

Blackmore, T. and Bahaj, A.S. (2014) Turbulence and its effects on the thrust and wake of a porous disc rotor simulator. Grand Renewable Energy 2014, Tokyo, Japan. 27 Jul - 01 Aug 2014. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Marine current turbines are still in their infancy with many devices at the development stage. Studies are often carried out using small scale laboratory experiments in flumes, towing tanks and numerical simulations to investigate the wakes and performance of scale marine current turbines. However, the characteristics of the inflow turbulence used in such studies is often not fully considered. Tidal flows are highly turbulent with a broad range of eddy sizes and intensities. So differences are expected when predictions of array energy yields are made from towing tanks studies with zero turbulence. This work considers the effects of turbulent eddy size on the thrust and wake behind a porous disc rotor simulator commonly used to represent marine current turbines in small scale experiments. The results show an increase in thrust coefficient with increasing length scale and a corresponding reduction in velocity deficit in the wake. These findings have implications to array special planning and hence energy yields.

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More information

Published date: July 2014
Venue - Dates: Grand Renewable Energy 2014, Tokyo, Japan, 2014-07-27 - 2014-08-01
Organisations: Energy & Climate Change Group

Identifiers

Local EPrints ID: 372457
URI: http://eprints.soton.ac.uk/id/eprint/372457
PURE UUID: 5e306ef9-4cb2-4cc3-8c24-093297f7a487
ORCID for A.S. Bahaj: ORCID iD orcid.org/0000-0002-0043-6045

Catalogue record

Date deposited: 15 Dec 2014 12:16
Last modified: 15 Mar 2024 02:33

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Contributors

Author: T. Blackmore
Author: A.S. Bahaj ORCID iD

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