Pressure_Impulse_Slamming.pdf (1.13 MB)
Download file

The pressure impulse of wave slamming on an oscillating wave energy converter

Download (1.13 MB)
journal contribution
posted on 20.07.2018, 08:33 authored by Emiliano RenziEmiliano Renzi, Yanji Wei, F. Dias
Recent wave tank experiments on a flap-type wave energy converter showed the occurrence of extreme wave loads, corresponding to slamming events in highly energetic seas. In this paper, we analyse pressure-impulse values from available pressure measurements, for a series of experimental slamming tests. Then, we devise a pressure-impulse model of the slamming of a flapping plate, including the effects caused by air entrapment near the plate. Using a double conformal-mapping technique, we map the original domain into a semi-infinite channel, by means of Gauss’ hypergeometric functions. This allows us to express the pressure impulse as a superimposition of orthogonal eigenfunctions in the transformed space. The mathematical model is validated against the experimental data. Parametric analysis shows that the system is much more sensitive to the impact angle than to the initial wetted portion of the flap. Furthermore, the presence of an aerated region determines the pressure-impulse values to increase significantly at all points on the flap surface.

Funding

This study was partially supported by Science Foundation Ireland (SFI) under the research project ”High-end Computational Modelling for Wave Energy Systems” (Grant SFI/10/IN.1/12996) in collaboration with Marine Renewable Energy Ireland (MaREI), the SFI Centre for Marine Renewable Energy Research (SFI/12/RC/2302).

History

School

  • Science

Department

  • Mathematical Sciences

Published in

Journal of Fluids and Structures

Citation

RENZI, E., WEI, Y. and DIAS, F., 2018. The pressure impulse of wave slamming on an oscillating wave energy converter. Journal of Fluids and Structures, 82, pp.258-271.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

06/07/2018

Publication date

2018-07-20

Notes

This paper was accepted for publication in the journal Journal of Fluids and Structures and the definitive published version is available at https://doi.org/10.1016/j.jfluidstructs.2018.07.007.

ISSN

1095-8622

Language

en

Usage metrics

Keywords

Exports