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An Experimental Study of Pneumatic Damping at the Air Chamber for an OWC-type Wave Energy Device  

CHOI HARK-SUN (Ocean Development System Laboratory, KORDI)
HONG SEOK-WON (Ocean Development System Laboratory, KORDI)
KlM JIN-HA (Ocean Development System Laboratory, KORDI)
LEW JAE-MOON (Dept. of Naval Architecture and Ocean Engineering, Chungnam National University)
Publication Information
Journal of Ocean Engineering and Technology / v.18, no.4, 2004 , pp. 8-14 More about this Journal
Abstract
Pneumatic damping through an orifice-type duct for an OWC-type wave energy device is studied experimentally. Forced oscillation tests are used to measure chamber pressure and velocity of air-flow through an orifice. Pneumatic damping coefficients are deducted from the experimental research, and the influence of frequency, heave amplitude, and orifice size are discussed. Finally, two formulas are proposed for the estimation of non-dimensional pneumatic damping coefficient by regression analysis. The proposed formula proves to be a reliable method for practical application.
Keywords
Pneumatic Damping; OWC; Oscillatory Duct Flow; Experimental Study;
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