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CFD Simulation of a Moored Floating Wave Energy Converter

Johannes Palm (Institutionen för sjöfart och marin teknik) ; Claes Eskilsson (Institutionen för sjöfart och marin teknik, Marine Design) ; Guilherme Moura Paredes ; Lars Bergdahl (Institutionen för sjöfart och marin teknik)
10th European Wave and Tidal Energy Conference (2309-1983). (2013)
[Konferensbidrag, refereegranskat]

The paper presents incompressible Navier-Stokes simulations of the dynamics of a floating wave energy converter (WEC) coupled to a high-order finite element solver for cable dynamics. The coupled model has very few limiting assumptions and is capable of capturing the effects of breaking waves, green water loads on the WEC as well as non-linear mooring forces and snap loads, all of which are crucial for correct estimates of the extreme loads acting on the system in violent seas. The cable dynamics model has been developed as a stand-alone library that can be coupled to any body motion solver. In this study the open-source CFD package OpenFOAM has been employed. Preliminary test cases using incident regular Stoke’s 5th order waves are presented, both for wave heights corresponding to operational conditions of the WEC as for a more severe condition in survival mode. It is illustrated that the coupled model is able to capture the complicated force propagation in the mooring cables.

Nyckelord: wave energy converter, mooring cable dynamics, catenary, Navier-Stokes equations, coupled analysis, time-domain analysis, survival



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Denna post skapades 2013-09-11. Senast ändrad 2017-03-21.
CPL Pubid: 183133

 

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Institutioner (Chalmers)

Institutionen för sjöfart och marin teknik (2005-2017)
Institutionen för sjöfart och marin teknik, Marine Design (2012-2014)

Ämnesområden

Energi
Hållbar utveckling
Marin teknik

Chalmers infrastruktur

C3SE/SNIC (Chalmers Centre for Computational Science and Engineering)

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Denna publikation ingår i:


Developing Computational Methods for Moored Floating Wave Energy Devices


Mooring dynamics for wave energy applications