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J. Ocean Eng. Technol. 2004;18(4):8-14.    

An Experimental Study of Pneumatic Damping at the Air Chamber for an OWC-type Wave Energy Device
CHOI HARK-SUN;HONG SEOK-WON;KlM JIN-HA;LEW JAE-MOON;
Ocean Development System Laboratory, KORDI;Ocean Development System Laboratory, KORDI;Ocean Development System Laboratory, KORDI;Dept. of Naval Architecture and Ocean Engineering, Chungnam National University;
OWC형 파력발전 공기챔버의 공기감쇠력 실험 연구
최학선;홍석원;김진하;류재문;
한국해양연구원 해양개발시스템연구본부;한국해양연구원 해양개발시스템연구본부;한국해양연구원 해양개발시스템연구본부;충남대학교 선박해양공학과;
© 2004 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: Pneumatic Damping, OWC, Oscillatory Duct Flow, Experimental Study
핵심용어: 공기감쇠, 진동수주, 관내왕복류, 실험연구
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.


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