Wave Extraction and Attenuation Performance of An Edinburgh Duck Wave Energy Converter

摘要

Edinburgh Duck wave energy converter (ED WEC) has excellent energy extraction performance and shows a great potential to integrate with other marine structures. This paper aims to investigate its wave energy extraction performance as a WEC and wave attenuation performance as a protection method for shoreline or marine structures. The wave and ED WEC interactions in regular waves are modeled using the Star-CCM+ software and verified by comparisons with published experimental results. The motion response, energy conversion efficiency, and transmission coefficient of the ED WEC with different attack angles, rotation center, and incident wave heights are investigated. Results indicate that the ED WEC with an attack angle of 42 degrees and a rotation center of 0.55 m below the mean water line can achieve both good wave energy extraction and wave attenuation performances. The wave energy extraction and wave attenuation performance of the ED WEC decrease significantly with the increase of wave nonlinearity characterized by the wave steepness. This paper can guide the practical application of the ED WEC at the early stage of design.

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