A Study on the Floating OWC Chamber Motion in Waves |
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부유기 OWC 챔버의 파중 운동해석 |
홍도천 |
한국해양연구원 해양개발시스템연구본부 |
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© 2002 The Korean Society of Ocean Engineers
Open access / Under a Creative Commons License
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Keywords:
Floating Body Motion in Waves, OWC : Oscillating Water Column, Free Surface Oscillating Pressure Patch, Matched Green Integral Equation, Rankine-kelvin Green Function, Wave Energy Absorption |
핵심용어:
파 중 부유체 운동, 진동수주, 자유표면 변동압력면, 정합 그린 적분방정식, 랜킨 및 켈빈형 그린함수, 파 에너지 흡수 |
Abstract |
The motion of a floating OWC chamber in waves is studied taking account of fluctuating air pressure in the air chamber. An atmospheric pressure drop occurs across the upper opening of the chamber which causes not only hydrodynamic but also pneumatic added mass and damping forces to the floating chamber. A velocity potential in the water due to the free surface oscillating pressure patch is added to the conventional radiation-diffraction potential problem. the potential problem inside the chamber is formulated by making use of the Green integral equation associated with the Rankine Green function wile the outer problem with the Kelvin Green function. The two integral equations are solved simultaneously by making use of a matching boundary condition at the lower opening of the chamber to the outer water region. The chamber motion in the frequency domain is calculated for various values of parameters related to the atmospheric pressure drop. The present methods can also be sued for the analysis of air-cushion vehicle motion as well as for the design of a floating OWC wave energy absorber. |
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