Basic operational parameters of a horizontal axis marine current turbine
Basic operational parameters of a horizontal axis marine current turbine
A 0.4m diameter horizontal axis Marine Current Turbine (MCT) was tested in a circulating water channel. The model was designed to facilitate variable speed operation with full pitching blades to simulate off design point operational conditions. The power output was measured over a range of flow speeds from 1.2ms-1 to 2.8 ms-1. Rotor torque and thrust were calculated using axial momentum theory.
Experimental results were compared with the output of a commercial BEM computer package named Bladed supplied by Garrad Hassan & Partners Ltd. Due to the prevalence of high blade angles of attack three separate aerofoil post stall equations were used to give varying levels of predicted power for the model.
Results from the water channel tests indicate that at high blade angles of attack the power generated was in excess of the most optimistic predicted values. At blade angles approaching pre-stall values measured power was in close agreement with predicted values. Cavitation was observed although appeared to have little effect upon power production although drivetrain vibration was noticeable.
This work will facilitate full-scale operational limits to be quantified for MCTs thus optimising performance of this new technology.
0080444709
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
16 November 2004
Myers, L.E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A.S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Myers, L.E. and Bahaj, A.S.
(2004)
Basic operational parameters of a horizontal axis marine current turbine.
In Proceedings of the 8th World Renewable Energy Congress (WREC VIII).
Elsevier Science.
3000 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
A 0.4m diameter horizontal axis Marine Current Turbine (MCT) was tested in a circulating water channel. The model was designed to facilitate variable speed operation with full pitching blades to simulate off design point operational conditions. The power output was measured over a range of flow speeds from 1.2ms-1 to 2.8 ms-1. Rotor torque and thrust were calculated using axial momentum theory.
Experimental results were compared with the output of a commercial BEM computer package named Bladed supplied by Garrad Hassan & Partners Ltd. Due to the prevalence of high blade angles of attack three separate aerofoil post stall equations were used to give varying levels of predicted power for the model.
Results from the water channel tests indicate that at high blade angles of attack the power generated was in excess of the most optimistic predicted values. At blade angles approaching pre-stall values measured power was in close agreement with predicted values. Cavitation was observed although appeared to have little effect upon power production although drivetrain vibration was noticeable.
This work will facilitate full-scale operational limits to be quantified for MCTs thus optimising performance of this new technology.
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More information
Published date: 16 November 2004
Venue - Dates:
World Renewable Energy Congress (WREC-VIII), Denver, United States, 2004-08-29 - 2004-09-03
Identifiers
Local EPrints ID: 53469
URI: http://eprints.soton.ac.uk/id/eprint/53469
ISBN: 0080444709
PURE UUID: 3cd428a8-82a2-4f34-bf4f-a9c133866d2c
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Date deposited: 28 Jul 2008
Last modified: 23 Jul 2022 01:49
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