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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50519

Title: A 2-D NUMERICAL MODEL FOR THE HYDRODYNAMIC BEHAVIORS OF A SLIDING BOTTOM HINGED FLAP WITH THE SPH METHOD
Authors: Da-Wei Chen
Shiaw-Yih Tzang
Chih-Min Hsieh
Jiahn-Horng Chen
Robert R. Hwang
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Smoothed Particle Hydrodynamics
Wave
Sliding Bottom Hinged Flap
Rotating Angle
Date: 2018-01
Issue Date: 2018-10-13T08:38:56Z
Publisher: Journal of Taiwan Society of Naval Architects and Marine Engineers
Abstract: Abstract: A Smoothed Particle Hydrodynamics (SPH) model was established to evaluate the hydrodynamic behaviors for a sliding bottom hinged flap (SBHF). The hydrodynamic behaviors were investigated primarily on rotating angle and sliding distance of a flap with regular wave trains of 7.8 cm in height and 1.56 s in period based on a model scale of 1:20 of typical wave conditions in winter monsoon seasons offshore northeastern Taiwan. Comparisons of the simulated rotating angles of present model with a non-sliding bottom-hinged flap (BHF) have shown reasonable agreements with a correlation coefficient of 0.98. The simulations have demonstrated a smaller averaged rotation of 4.18° at an averaged sliding distance of 0.09 m during a wave cycle. Comparisons of the flow fields and circulations near the flaps with BHF show that a SBHF could be easily driven with the incident waves and have the lower circulations than a bottom-hinged. For energy conversions, the SBHF had resulted in lower both reflection and transmission coefficients so that higher power could be extracted by a SBHF.
Relation: 36(3) pp.117-126
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50519
Appears in Collections:[河海工程學系] 期刊論文

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