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

Citation

Bennet, M and Penesis, I and Fleming, AN and MacFarlane, GJ and Nader, J-R, Experimental Study into the Diffracted Wave Field Downstream of an Array of Wave Energy Converters in Irregular Waves, Proceedings of the 12th European Wave and Tidal Energy Conference (EWTEC 2017), 27 August - 1 September 2017, Cork, Ireland, pp. 1-10. (In Press) [Refereed Conference Paper]


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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 with arrays 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 numerical models 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 of arrays making use of constructive interference present. Ultimately, these results offer a contribution to the acknowledged need for experimental validation of existing models, while presenting videogrammetry as a viable alternative to traditional wave measurement technologies.

Item Details

Item Type:Refereed Conference Paper
Keywords:Wave Energy Converter, Arrays, Irregular Waves, Videogrammetry, Diffraction, Wave Spectral Energy
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ocean Engineering
Objective Division:Energy
Objective Group:Renewable Energy
Objective Field:Wave Energy
Author:Penesis, I (Associate Professor Irene Penesis)
Author:Fleming, AN (Dr Alan Fleming)
Author:MacFarlane, GJ (Associate Professor Gregor MacFarlane)
Author:Nader, J-R (Dr Jean-Roch Nader)
ID Code:121673
Year Published:In Press
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-10-10
Last Modified:2017-11-24
Downloads:0

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