In this paper the three-dimensional numerical simulation is conducted for Oscillating Wave Surge Converters (OWSCs) using computational fluid dynamics (CFD) software FLOW-3D, based on the wave climate of the offshore sea in northeast Taiwan, that is, 1.5 meters of wave height and 7 seconds of the wave period. The results are compared with that using the wave energy converter simulation toolbox, WEC-Sim. The effects of the parameters, including the flap thickness, flap width, the position of the mass center, and flap density, are investigated, especially their influence of the energy capturing efficiency or the capture factor (CF). The simulation results show that, bigger flap thickness (d), smaller flap width (B), smaller flap density, and lower flap’s center of mass will result in a higher efficiency for power capture performance. Among the four parameters, the flap thickness is the most dominant parameter. From hydrodynamic respect, a larger drag force may occur at the sidewalls of the thick flap, and the shear force accelerate the pitch motion of the flap, in turn increasing the absorption efficiency. From a practical design aspect, the variation of the CF around the peak value is smoother for wider flap, which suggests a broad bandwidth in receiving various wave frequency in irregular waves.
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ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
June 17–22, 2018
Madrid, Spain
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5131-9
PROCEEDINGS PAPER
Numerical Study on the Geometric and Inertial Parameters for Oscillating Wave Surge Converters
Chen-Chou Lin,
Chen-Chou Lin
National Taiwan Ocean University, Keelung, Taiwan
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Yi-Chih Chow,
Yi-Chih Chow
National Taiwan Ocean University, Keelung, Taiwan
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Shiaw-Yih Tzang,
Shiaw-Yih Tzang
National Taiwan Ocean University, Keelung, Taiwan
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Ching-Yen Chiou,
Ching-Yen Chiou
National Taiwan Ocean University, Keelung, Taiwan
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Yu-Yu Huang
Yu-Yu Huang
National Taiwan Ocean University, Keelung, Taiwan
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Chen-Chou Lin
National Taiwan Ocean University, Keelung, Taiwan
Yi-Chih Chow
National Taiwan Ocean University, Keelung, Taiwan
Shiaw-Yih Tzang
National Taiwan Ocean University, Keelung, Taiwan
Ching-Yen Chiou
National Taiwan Ocean University, Keelung, Taiwan
Yu-Yu Huang
National Taiwan Ocean University, Keelung, Taiwan
Paper No:
OMAE2018-77938, V010T09A040; 9 pages
Published Online:
September 25, 2018
Citation
Lin, C, Chow, Y, Tzang, S, Chiou, C, & Huang, Y. "Numerical Study on the Geometric and Inertial Parameters for Oscillating Wave Surge Converters." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy. Madrid, Spain. June 17–22, 2018. V010T09A040. ASME. https://doi.org/10.1115/OMAE2018-77938
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