The University of Southampton
University of Southampton Institutional Repository

The effect of trailing edge profile modifications to fluid-structure Interactions of a vertical axis tidal turbine blade

The effect of trailing edge profile modifications to fluid-structure Interactions of a vertical axis tidal turbine blade
The effect of trailing edge profile modifications to fluid-structure Interactions of a vertical axis tidal turbine blade
Renewable energy has become an essential energy alternative since the continual depletion of non-renewable energy resources and increasing environmental issues. Tidal energy is a promising future renewable resource which can be extracted using a vertical axis tidal turbine. Since it was proposed, a tidal turbine performance requires improvements which can be obtained by a blade’s trailing edge modification. Modifying the blade’s trailing edge profile is confirmed to be one way to improve a turbine’s work. However, the influence of a trailing edge modifications on a vertical axis tidal turbine blade’s interaction with fluid has not been fully understood. The fluid behaviour as an interaction response on a vertical axis tidal turbine blade has not been completely discovered. In this paper, 2D fluid-structure interactions of modified vertical axis tidal turbine blades are examined and modelled using Open FOAM. The interaction exhibits fluid induced vibration which is performed by a turbine blade’s displacement during operation. Three different modified blade profiles are proposed: sharp, rounded, and blunt. The modified profiles are employed to an original NACA 0012 blade and their influences on a vertical axis tidal turbine blade interaction are observed. The result discovers the fluid behaviour and fluid-induced vibrations at all positions (represented by 12 positions) over one turbine’s cycle. The results demonstrate the frequency domain blade velocities and time domain blade displacements for all modified blades. The fluid behaviour around the blade is confirmed by pressure distribution plots over the blade’s upper and lower surfaces. The results show that the blunt profile provides less frequent vibrations due to a reducing vorticity in the downstream fluid regime. However, the vibration amplitude that occurs on the blunt blade is higher than those of rounded and sharp profiles. Based on this research, the blunt trailing edge profile appears to be more favourable to be applied and used for vertical axis tidal turbine blades.
Fluid-structure interactions, OpenFOAM, fluid induced vibrations, modified blades, tidal energy
2252-4940
725-735
Arini, Nu Rhahida
97ed4c38-80f6-4c1b-9ff0-54bf9828c8c9
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c
Arini, Nu Rhahida
97ed4c38-80f6-4c1b-9ff0-54bf9828c8c9
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c

Arini, Nu Rhahida, Turnock, Stephen and Tan, Mingyi (2022) The effect of trailing edge profile modifications to fluid-structure Interactions of a vertical axis tidal turbine blade. International Journal of Renewable Energy Development, 11 (3), 725-735. (doi:10.14710/ijred.2022.44669).

Record type: Article

Abstract

Renewable energy has become an essential energy alternative since the continual depletion of non-renewable energy resources and increasing environmental issues. Tidal energy is a promising future renewable resource which can be extracted using a vertical axis tidal turbine. Since it was proposed, a tidal turbine performance requires improvements which can be obtained by a blade’s trailing edge modification. Modifying the blade’s trailing edge profile is confirmed to be one way to improve a turbine’s work. However, the influence of a trailing edge modifications on a vertical axis tidal turbine blade’s interaction with fluid has not been fully understood. The fluid behaviour as an interaction response on a vertical axis tidal turbine blade has not been completely discovered. In this paper, 2D fluid-structure interactions of modified vertical axis tidal turbine blades are examined and modelled using Open FOAM. The interaction exhibits fluid induced vibration which is performed by a turbine blade’s displacement during operation. Three different modified blade profiles are proposed: sharp, rounded, and blunt. The modified profiles are employed to an original NACA 0012 blade and their influences on a vertical axis tidal turbine blade interaction are observed. The result discovers the fluid behaviour and fluid-induced vibrations at all positions (represented by 12 positions) over one turbine’s cycle. The results demonstrate the frequency domain blade velocities and time domain blade displacements for all modified blades. The fluid behaviour around the blade is confirmed by pressure distribution plots over the blade’s upper and lower surfaces. The results show that the blunt profile provides less frequent vibrations due to a reducing vorticity in the downstream fluid regime. However, the vibration amplitude that occurs on the blunt blade is higher than those of rounded and sharp profiles. Based on this research, the blunt trailing edge profile appears to be more favourable to be applied and used for vertical axis tidal turbine blades.

Text
44669-138915-3-RV - revised -checked - Accepted Manuscript
Restricted to Repository staff only
Request a copy
Text
44669-144148-1-PB - Version of Record
Available under License Creative Commons Attribution Share Alike.
Download (912kB)

More information

Accepted/In Press date: 26 April 2022
e-pub ahead of print date: 1 May 2022
Published date: 4 August 2022
Additional Information: Publisher Copyright: © The author(s).
Keywords: Fluid-structure interactions, OpenFOAM, fluid induced vibrations, modified blades, tidal energy

Identifiers

Local EPrints ID: 468817
URI: http://eprints.soton.ac.uk/id/eprint/468817
ISSN: 2252-4940
PURE UUID: 9bf4bdcc-cf6a-4515-b224-a58546136b06
ORCID for Stephen Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 26 Aug 2022 16:40
Last modified: 27 Oct 2022 01:33

Export record

Altmetrics

Contributors

Author: Nu Rhahida Arini
Author: Stephen Turnock ORCID iD
Author: Mingyi Tan

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×