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Coupled mooring analysis for floating wave energy converters using CFD: Formulation and validation

Johannes Palm (Institutionen för sjöfart och marin teknik, Marin teknik) ; Claes Eskilsson (Institutionen för sjöfart och marin teknik, Marin teknik) ; Guilherme Paredes ; Lars Bergdahl (Institutionen för sjöfart och marin teknik, Marin teknik)
International Journal of Marine Energy (2214-1669). Vol. 16 (2016), p. 83-99.
[Artikel, refereegranskad vetenskaplig]

Floating wave energy converters (WECs) operating in the resonance region are stronglyaffected by non-linearities arising from the interaction between the waves, the WECmotion and the mooring restraints. To compute the restrained WEC motion thus requiresa method which readily accounts for these effects. This paper presents a method forcoupled mooring analysis using a two-phase Navier–Stokes (VOF–RANS) model and ahigh-order finite element model of mooring cables. The method is validated againstexperimental measurements of a cylindrical buoy in regular waves, slack-moored withthree catenary mooring cables. There is overall a good agreement between experimentaland computational results with respect to buoy motions and mooring forces. Mostimportantly, the coupled numerical model accurately recreates the strong wave heightdependence of the response amplitude operators seen in the experiments.

Nyckelord: Wave energy, Point-absorbers, Navier–Stokes equations, Mooring dynamics, Coupled simulations



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Denna post skapades 2016-05-24. Senast ändrad 2016-05-24.
CPL Pubid: 236871