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http://dx.doi.org/10.5293/kfma.2014.17.2.041

The Experimental Study about Kinetic Change of Water Surface in the Chambers for Wave Energy Converter  

Hadano, Kesayoshi (Graduate School of Science & Engineering, Hydraulic Engineering, Yamaguchi University)
Moon, Byung-Young (Kunsan National University, Department of Naval Architecture)
Lee, Seong-Beom (Kunsan National University, Department of Naval Architecture)
Kim, Kwang-Jung (Kunsan National University, Department of Naval Architecture)
Publication Information
The KSFM Journal of Fluid Machinery / v.17, no.2, 2014 , pp. 41-47 More about this Journal
Abstract
Experimental results are given for the vertical motion of water in the water chambers for wave energy converter aligned along the wave propagation direction in order to avoid the impulsive wave forces. This paper mainly focuses on the property of the amplitude of the vertical motion of the water surface in the chambers. The amplification has been investigated by dimensionless parameters of wave period to resonance period ratio of the U-shaped oscillation, $T/T_r$, chamber size to wave length ratio, l/L, water depth to wave length ratio, h/L, amplitude of up-down motion of water particles to draft of the front wall ratio, ${\zeta}/D$. It has been shown that l/L should be less than 0.1 and as $T/T_r$ approaches unity the up-down of the water in the chambers is amplified. Also, the structure of the walls which form th water chambers has been examined roughly. It is deduced that the chambers set on both sides of the hull of a single-point moored floating vessel is preferable to those set along a fixed structure such as breakwaters.
Keywords
Wave Energy convert; Vertical motion of water; water chambers; wave direction; wire tension;
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