A Study on the Viscous Damping Effect According to the Shape of the Inclined OWC Chamber Skirt

In this study, numerical analysis and experiments were performed to analyze the viscous damping effect according shape of chamber skirt breakwater-linked inclined oscillating water column wave energy converter. Experiments conducted using a two-dimensional mini tank verified by comparing results computational fluid dynamics analysis. Pointed rounded skirts modeled compare when incident waves enter chamber, difference in displacement surface was compared period for two shapes. The elevation rounded-skirt condition larger than pointed-skirt all periods, which approximately 47% greater at 0.9 s period. Therefore, extracting maximum through optimal orifice is possible while minimizing attenuation condition.