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Title: Numerical simulation of hydrodynamic behavior on wave-flap structure interactions with a SPH model
Authors: David Chen;S Y Tzang;N Y Zeng;C M Hsieh;Robert R Hwang;Jiahn-Horng Chen
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Date: 2012
Issue Date: 2018-05-17T07:31:44Z
Publisher: Conference: International Conference on Asian and Pacific Coasts
Abstract: Abstract:In this study, a SPH model is preliminarily applied to estimate the interactions between a bottom-hinged wave energy converter (WEC) and free surface waves in a 2-D numerical wave flume. To estimate the capturing efficiency of a WEC in this flume, a monochromatic wave with height of 7.15 cm and period of 1.56 s based on a model scale of 1:20 of the in-situ wave conditions were adopted. The results show that the loading waves can cause the flapper to stably swing back and forth within average ranges of 16~18 degrees. The phases could directly influence the flapper's swinging and should potentially play a key role in capturing wave energy. Comparisons of the velocity profiles at different phases further illustrate that elliptical form of water particle trajectory could directly influence the rotations of flapper. When the flapper undergoes small rotations, most of the counterclockwise vortices in the weather side and clockwise ones in the lee side have occurred around the flapper. But when the flapper undergoes large rotations, those vortices would only occur near free-surface. Meanwhile, the circulations in the lee side of the flapper have increased while those in the weather side have decreased
Appears in Collections:[Department of Systems Engineering and Naval Architecture] Lecture & Seminar

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