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The influence of tidal unsteadiness on a tidal turbine blade flowinduced vibration

The influence of tidal unsteadiness on a tidal turbine blade flowinduced vibration
The influence of tidal unsteadiness on a tidal turbine blade flowinduced vibration

The influence of unsteady tidal flow on the flow-induced vibration of a vertical axis tidal turbine blade is investigated numerically in this paper. A 2D CFD model is developed to simulate the blade flow-induced vibration in OpenFoam. The vibration is caused by dynamic loading from the unsteady tide. It is recognized that the unsteady tidal current mainly comes from the changes in tidal velocity magnitude and angle of attack experienced by a tidal turbine blade as it rotates. This paper studies numerically how velocity magnitude and initial angle of attack influence tidal turbine blade vibrations and the effects of the velocity and angle of attack are evaluated separately where the unsteadiness parameters are varied around a set of environmental condition. The vibration is examined through time histories of blade displacement, pressure distribution on the blade surface and the tidal current regime. The blade is assumed to have pitch and heave responses thus the vibration is in the form of transverse and torsional vibrations. The results show that increasing tidal velocity magnitude strengthens the torsional vibration. The increase of angle of attack is likely to generate chaotic motions and enhance both transverse and torsional vibrations.

Flow-induced vibration, Tidal turbine, Unsteady tidal flow
American Society Of Mechanical Engineers (ASME)
Arini, Nu Rhahida
97ed4c38-80f6-4c1b-9ff0-54bf9828c8c9
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c
Arini, Nu Rhahida
97ed4c38-80f6-4c1b-9ff0-54bf9828c8c9
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c

Arini, Nu Rhahida, Turnock, Stephen R. and Tan, Mingyi (2019) The influence of tidal unsteadiness on a tidal turbine blade flowinduced vibration. In Ocean Renewable Energy. American Society Of Mechanical Engineers (ASME).. (doi:10.1115/omae2019-96007).

Record type: Conference or Workshop Item (Paper)

Abstract

The influence of unsteady tidal flow on the flow-induced vibration of a vertical axis tidal turbine blade is investigated numerically in this paper. A 2D CFD model is developed to simulate the blade flow-induced vibration in OpenFoam. The vibration is caused by dynamic loading from the unsteady tide. It is recognized that the unsteady tidal current mainly comes from the changes in tidal velocity magnitude and angle of attack experienced by a tidal turbine blade as it rotates. This paper studies numerically how velocity magnitude and initial angle of attack influence tidal turbine blade vibrations and the effects of the velocity and angle of attack are evaluated separately where the unsteadiness parameters are varied around a set of environmental condition. The vibration is examined through time histories of blade displacement, pressure distribution on the blade surface and the tidal current regime. The blade is assumed to have pitch and heave responses thus the vibration is in the form of transverse and torsional vibrations. The results show that increasing tidal velocity magnitude strengthens the torsional vibration. The increase of angle of attack is likely to generate chaotic motions and enhance both transverse and torsional vibrations.

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More information

Published date: 11 November 2019
Additional Information: Publisher Copyright: © 2019 American Society of Mechanical Engineers (ASME). All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Venue - Dates: ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019, , Glasgow, United Kingdom, 2019-06-08 - 2019-06-13
Keywords: Flow-induced vibration, Tidal turbine, Unsteady tidal flow

Identifiers

Local EPrints ID: 449214
URI: http://eprints.soton.ac.uk/id/eprint/449214
PURE UUID: 7ac98540-1d13-4e90-8038-a826611450c5
ORCID for Stephen R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 19 May 2021 18:19
Last modified: 20 May 2021 01:33

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Contributors

Author: Nu Rhahida Arini
Author: Mingyi Tan

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