Research on Wave Attenuation Performance of Floating Breakwater

Hao Li, Junhua Chen, Lingjie Bao and Chuhua Jiang
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Hao Li: College of Science & Technology, Ningbo University, Cixi 315300, China
Junhua Chen: College of Science & Technology, Ningbo University, Cixi 315300, China
Lingjie Bao: Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315000, China
Chuhua Jiang: College of Science & Technology, Ningbo University, Cixi 315300, China

Energies, 2021, vol. 14, issue 24, 1-15

Abstract: In this study, a new type of double-pontoon floating breakwater was designed to improve the wave attenuation performance through the addition of suspended Savonius propeller-blade. Its hydrodynamic characteristics were studied through numerical simulations and performance-testing experiment. The following investigations were performed in this study: Firstly, wave theory and hydrodynamic theory were combined to calculate the wave attenuation performance and motion response of double-pontoon floating breakwater under linear wave conditions. The numerical results showed that the wave attenuation performance was better under a specific wave period and height, the transmission coefficient reached a relatively small value, and the mooring line tension responded periodically and satisfied the condition of maximum breaking force. Secondly, three key geometric parameters of breakwater were researched, including the relative spacing of pontoons, the relative spacing between pontoons and blades, and the height–diameter ratio of Savonius blades. The calculation results showed that the pontoon spacing was closer to the wavelength and the breakwater wave attenuation performance was better. Lastly, experimental tests were also performed on the new double-pontoon floating breakwater and the results showed that the wave attenuation performance and numerical projections were basically the same, which verified the validity and effectiveness of the design method.

Keywords: double-pontoon floating breakwater; Savonius blade; wave attenuation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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