NUMERICAL MODELING OF WAVE-INDUCED ROTATIONS OF A BOTTOM-HINGED FLAPPER WITH A SPH MODEL

Authors

Da-Wei Chen, Department of Harbor & River Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C
Shiaw-Yih Tzang, Department of Harbor & River Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.CFollow
Chih-Min Hsieh, Department of Maritime Information and Technology, National Kaohsiung Marine University, Kaohsiung, Taiwan, R.O.C.
Yi-Chih Chow, Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.
Jiahn-Horng Chen, Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.
Chen-Chou Lin, Department of Mechanical & Mechatronic Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.
Robert Rong-Jiann Hwang, Department of Systems Engineering & Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, R.O.C Institute of Physics, Academia Sinica, Taipei, Taiwan, R.O.C

Abstract

In this study, a Smoothed Particle Hydrodynamics model for simulating wave-induced rotations of a bottom-hinged flapper was established in a 2-D numerical wave flume. The simulated rotating angles illustrated that the flapper could swing back and forth following harmonic wave loadings. The simulations were also seen to be in good agreement with experimental data, confirming the applicability of the present numerical model. The simulated hydrodynamic behaviors at different phases showed that the flapper moved downstream under the wave crest and upstream under the wave trough following the elliptical form of water particle trajectory. The energy conversions of a flapper during an average wave cycle showed that larger rotating angle ranges could result in higher energy conversions. However, smaller rotating angle ranges could result in higher captured efficiency.

Recommended Citation

Chen, Da-Wei; Tzang, Shiaw-Yih; Hsieh, Chih-Min; Chow, Yi-Chih; Chen, Jiahn-Horng; Lin, Chen-Chou; and Hwang, Robert Rong-Jiann (2014) "NUMERICAL MODELING OF WAVE-INDUCED ROTATIONS OF A BOTTOM-HINGED FLAPPER WITH A SPH MODEL," Journal of Marine Science and Technology: Vol. 22: Iss. 3, Article 11.
DOI: 10.6119/JMST-012-1221-1
Available at: https://jmstt.ntou.edu.tw/journal/vol22/iss3/11