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Modelling of a Damped Generic Submerged Spherical Wave Energy Converter in Resonance

Bharath, AB, Nader, J-R ORCID: 0000-0002-5689-7342, Penesis, I ORCID: 0000-0003-4570-6034 and MacFarlane, GJ ORCID: 0000-0002-0518-430X 2017 , 'Modelling of a Damped Generic Submerged Spherical Wave Energy Converter in Resonance', paper presented at the 12th European Wave and Tidal Energy Conference (EWTEC 2017), 27 August - 1 September 2017, Cork, Ireland.

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Abstract

Understanding the importance of nonlinear effects on wave energy converters (WECs) is key to an accurate prediction of the power take-off (PTO) and design parameters during the development stage. The current study applies a fully nonlinear CFD model to analyse the performance of a fully submerged spherical WEC operating in heave. Three optimalrestoring force coefficient values are used based on the incident wave frequencies along with the coinciding optimum radiation damping coefficient derived from previous linear models. CFD PTO results from the WEC cases are shown, quantifying the impact of nonlinear effects. Results show distinct variations between the linear and CFD approaches to modelling a WEC due mainly in part to interactions between the free surface and the WEC.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Bharath, AB and Nader, J-R and Penesis, I and MacFarlane, GJ
Keywords: wave energy converter, computational fluid dynamics, volume of fluid, linear power take-off, nonlinear modelling
Journal or Publication Title: Proceedings of the 12th European Wave and Tidal Energy Conference (EWTEC 2017)
Publisher: University of Southampton
Copyright Information:

Copyright 2017 European Wave and Tidal Energy Conference

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