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

Citation

Bharath, AB and Nader, J-R and Penesis, I and MacFarlane, GJ, Modelling of a Damped Generic Submerged Spherical Wave Energy Converter in Resonance, Proceedings of the 12th European Wave and Tidal Energy Conference (EWTEC 2017), 27 August - 1 September 2017, Cork, Ireland, pp. 1-7. (In Press) [Refereed Conference Paper]


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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 optimal restoring 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 Details

Item Type:Refereed Conference Paper
Keywords:wave energy converter, computational fluid dynamics, volume of fluid, linear power take-off, nonlinear modelling
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ocean Engineering
Objective Division:Energy
Objective Group:Renewable Energy
Objective Field:Wave Energy
Author:Bharath, AB (Mr Aidan Bharath)
Author:Nader, J-R (Dr Jean-Roch Nader)
Author:Penesis, I (Associate Professor Irene Penesis)
Author:MacFarlane, GJ (Associate Professor Gregor MacFarlane)
ID Code:121671
Year Published:In Press
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-10-10
Last Modified:2017-11-24
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