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Experimental Study into the Diffracted Wave Field Downstream of an Array of Wave Energy Converters in Irregular Waves

Bennet, M, Penesis, I ORCID: 0000-0003-4570-6034, Fleming, AN ORCID: 0000-0002-2738-4521, MacFarlane, GJ ORCID: 0000-0002-0518-430X and Nader, J-R ORCID: 0000-0002-5689-7342 2017 , 'Experimental Study into the Diffracted Wave Field Downstream of an Array of Wave Energy Converters in Irregular Waves', paper presented at the 12th European Wave and Tidal Energy Conference (EWTEC 2017), 27 August - 1 September 2017, Cork, Ireland.

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Abstract

For wave energy to be a viable renewable energy source, conversion devices will eventually be deployed in large arrays. Presently, knowledge of device interactions within arrays is limited to numerical studies; however, for development in array design and deployment to progress, verification through experimentation is needed. Experiments were conducted witharrays of submerged spheres representing generic wave energy converters subject to a realistic irregular wave series. Using nonintrusive stereo-videogrammetry, the domain within and downstream of the devices was measured at high resolution, and hence the wave field characteristics by wave diffraction were mapped through processing of the time record. It is shown that the experimental diffracted wave field matches the existing numericalmodels within the region measured, showing shadows of attenuation and amplification of the wave energy flux spreading from the array. These lead to possibilities for optimisation ofarrays making use of constructive interference present. Ultimately, these results offer a contribution to the acknowledged need for experimental validation of existing models, whilepresenting videogrammetry as a viable alternative to traditional wave measurement technologies.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Bennet, M and Penesis, I and Fleming, AN and MacFarlane, GJ and Nader, J-R
Keywords: Wave Energy Converter, Arrays, Irregular Waves, Videogrammetry, Diffraction, Wave Spectral Energy
Journal or Publication Title: Proceedings of the 12th European Wave and Tidal Energy Conference (EWTEC 2017)
Publisher: University of Southampton
Copyright Information:

Copyright 2017 European Wave and Tidal Energy Conference

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