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Mooring analysis of a floating OWC wave energy converter

Citation

Pols, A and Gubesch, E and Abdussamie, N and Penesis, I and Chin, C, Mooring analysis of a floating OWC wave energy converter, Journal of Marine Science and Engineering, 9, (2) Article 228. ISSN 2077-1312 (2021) [Refereed Article]


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Copyright Statement

Copyright 2021 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/jmse9020228

Abstract

This investigation focuses on the modelling of a floating oscillating water column (FOWC) wave energy converter with a numerical code (ANSYS AQWA) based on potential flow theory. Free-floating motions predicted by the numerical model were validated against experimental data extrapolated from a 1:36 scale model device in regular and irregular sea states. Upon validation, an assessment of the device’s motions when dynamically coupled with a four-line catenary mooring arrangement was conducted at different incident wave angles and sea states ranging from operational to survivable conditions, including the simulation of the failure of a single mooring line. The lack of viscosity in the numerical modelling led to overpredicted motions in the vicinity of the resonant frequencies; however, the addition of an external linear damping coefficient was shown to be an acceptable method of mitigating these discrepancies. The incident wave angle was found to have a limited influence on the magnitudes of heave, pitch, and surge motions. Furthermore, the obtained results indicated that the mooring restoring force is controlled by the forward mooring lines under the tested conditions.

Item Details

Item Type:Refereed Article
Keywords:floating oscillating water column, mooring analysis, potential flow, wave energy
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Energy
Objective Group:Renewable energy
Objective Field:Wave energy
UTAS Author:Pols, A (Miss Alana Pols)
UTAS Author:Gubesch, E (Mr Eric Gubesch)
UTAS Author:Abdussamie, N (Dr Nagi Abdussamie)
UTAS Author:Penesis, I (Professor Irene Penesis)
UTAS Author:Chin, C (Dr Chris Chin)
ID Code:143117
Year Published:2021
Web of Science® Times Cited:1
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-02-27
Last Modified:2021-10-26
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