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    Importance of Nonlinear Wave Representation for Nonlinear Froude-Krylov Force Calculations for Wave Energy Devices


    Giorgi, Giuseppe and Ringwood, John (2017) Importance of Nonlinear Wave Representation for Nonlinear Froude-Krylov Force Calculations for Wave Energy Devices. Proceedings of the 12th European Wave and Tidal Energy Conference 27th Aug -1st Sept 2017 (644). pp. 1-7. ISSN 2309-1983

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    Abstract

    Due to their computational convenience, mathematical models for wave energy converters are usually linear. Including nonlinearities may improve the accuracy of the results, but often at the price of an additional computational and complexity burden, which can be justified only if nonlinearities are significant. One of the sources of nonlinearity in fluid-body interactions is the wave field itself. Different wave models exist, among which are linear Airy’s theory, the Wheeler stretching approach, and the nonlinear Rienecker-Fenton method, which achieve a different compromise of accuracy and complexity. The impact of the accuracy of such wave theories strongly depends on the specific device (operating principle, power production region and survivability mode), and installation site (water depth, occurrences of each sea state in the scatter diagram of the installation site). This paper evaluates the performance of different wave field representations, firstly in absolute terms, and secondly in relation to the associated computation of nonlinear Froude-Krylov forces for different wave energy devices.

    Item Type: Article
    Keywords: Nonlinear wave; Wheeler stretching; Rienecker-Fenton wave; nonlinear Froude-Krylov force; wave energy converters;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Item ID: 12457
    Depositing User: Professor John Ringwood
    Date Deposited: 12 Feb 2020 17:08
    Journal or Publication Title: Proceedings of the 12th European Wave and Tidal Energy Conference 27th Aug -1st Sept 2017
    Publisher: European Wave and Tidal Energy Conference 2017
    Refereed: Yes
    URI:

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