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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50520

Authors: Da-Wei Chen
Shuichi Nagata
Shiaw-Yih Tzang
Yasutaka Imai
Chih-Min Hsieh
Jiahn-Horng Chen
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: wave energy attenuator
smooth particle hydrodynamics
floating object
rotating angle
energy conversion
Date: 2017-12
Issue Date: 2018-10-13T08:42:43Z
Publisher: Journal of Marine Science and Technology-Taiwan
Abstract: Abstract: The wave energy attenuator is a floating device which operates
perpendicular to the wave fronts and captures wave energy from
the relative motions of two hinged floaters as waves passing by
them. For establishing the time-domain numerical tools to evaluate
the performance of a wave energy attenuator, a Smoothed
Particle Hydrodynamic (SPH) model with mesh-free method
was adopted to simulate the hydrodynamic behaviors of each
floating object. Three different wave heights of 6 cm, 7 cm, and
10.4 cm of the same period of 1.22 s were commonly derived
from typical potential oceanic zones offshore Taiwan and Japan.
Comparisons of the hydrodynamic behaviors of an attenuator
show that the device has an averaged rotating angles of about
9-15 degrees for the upstream floater (Floater A) and of smaller
about 6-9 degrees for the downstream floater (Floater B) during
an averaged wave cycle. For energy conversions, the wave height
of 6 cm has the maximum capture factor of 22%, which is larger
than those of 7 cm and 10.4 cm by about 4% and 17%, respectively.
Moreover, the converted ratio by an attenuator WEC
from wave energy loss are about 67% at H = 6 cm, 38% at H =
7 cm, and 19% at H = 10.4 cm, respectively.
Relation: 25(6) pp.752-760
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50520
Appears in Collections:[河海工程學系] 期刊論文

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