Applicability of linear and non-linear potential flow models on a Wavestar float

Publikation: Forskning - peer reviewKonferenceartikel i proceeding

Abstrakt

Numerical models based on potential flow theory, including different types of nonlinearities are compared and validated against experimental data for the Wavestar wave energy converter technology. Exact resolution of the rotational motion, non-linear hydrostatic and Froude-Krylov forces as well as a model based on non-linear potential flow theory and weakscatterer hypothesis are successively considered. Simple tests, such as dip tests, decay tests and captive tests enable to highlight the improvements obtained with the introduction of nonlinearities. Float motion under wave actions and without control action, limited to small amplitude motion with a single float, is well predicted by the numerical models, including the linear one. Still, float velocity is better predicted by accounting for non-linear hydrostatic and Froude-Krylov forces.
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Detaljer

Numerical models based on potential flow theory, including different types of nonlinearities are compared and validated against experimental data for the Wavestar wave energy converter technology. Exact resolution of the rotational motion, non-linear hydrostatic and Froude-Krylov forces as well as a model based on non-linear potential flow theory and weakscatterer hypothesis are successively considered. Simple tests, such as dip tests, decay tests and captive tests enable to highlight the improvements obtained with the introduction of nonlinearities. Float motion under wave actions and without control action, limited to small amplitude motion with a single float, is well predicted by the numerical models, including the linear one. Still, float velocity is better predicted by accounting for non-linear hydrostatic and Froude-Krylov forces.
OriginalsprogEngelsk
Titel12th EWTEC - Proceedings of the 12th European Wave and Tidal Energy Conference : 27th Aug -1st Sept 2017, Cork, Ireland
Antal sider10
UdgiverTechnical Committee of the European Wave and Tidal Energy Conference
Publikationsdato2017
Artikelnummer646
StatusUdgivet - 2017
Begivenhed - Cork, Irland

Konference

Konference12th European Wave and Tidal Energy Conferenc
Nummer12
LandIrland
ByCork
Periode27/08/201701/09/2017
SerieEuropean Wave and Tidal Energy Conference Series
Nummer2017
Vol/bind12

    Emneord

  • Wave energy, Potential flow theory, Nonlinear hydrostatics, Nonlinear Froude Krylov forces, Weak-scatterer

Kort

ID: 262325069