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Article

Near Trapping Effect on Wave-Power Extraction by Linear Periodic Arrays

1
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2
Department of Engineering Science, Uppsala University, 75239 Uppsala, Sweden
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(1), 29; https://doi.org/10.3390/su12010029
Received: 22 October 2019 / Revised: 12 December 2019 / Accepted: 16 December 2019 / Published: 18 December 2019
Near trapping is a kind of strong hydrodynamic interaction phenomenon in a regular array under specific incident wave conditions, which causes the excitation force on the structures in the array to change suddenly. In this paper, based on linear potential flow theory, the effects of near trapping on the hydrodynamic interaction and wave-power extraction characteristics of linear periodic arrays composed of the oscillating float type wave energy converters are studied by using the higher-order boundary element method in a frequency domain. The parameters considered include the separation spacing, number of devices, and incident wave direction. It is found that the near trapping significantly reduces the overall wave-power extraction, especially for the cases with a large number of devices, and changes the trend of the power distribution. The occurrence of the near trapping phenomenon depends on the ratio of the separation spacing to the wavelength and the incident wave direction. The results highlight the effective layout of linear arrays under the influence of near trapping, which not only ensures the total production power, but also reduces the power difference among wave energy converters. View Full-Text
Keywords: near trapping; array; interaction factor; wave energy converter near trapping; array; interaction factor; wave energy converter
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MDPI and ACS Style

Ning, D.; He, Z.; Gou, Y.; Göteman, M. Near Trapping Effect on Wave-Power Extraction by Linear Periodic Arrays. Sustainability 2020, 12, 29. https://doi.org/10.3390/su12010029

AMA Style

Ning D, He Z, Gou Y, Göteman M. Near Trapping Effect on Wave-Power Extraction by Linear Periodic Arrays. Sustainability. 2020; 12(1):29. https://doi.org/10.3390/su12010029

Chicago/Turabian Style

Ning, Dezhi; He, Zechen; Gou, Ying; Göteman, Malin. 2020. "Near Trapping Effect on Wave-Power Extraction by Linear Periodic Arrays" Sustainability 12, no. 1: 29. https://doi.org/10.3390/su12010029

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