Numerical Investigation of Dual-OWC-Devices System Composed by Offshore and Onshore Unit
Based on the open source package OpenFOAM and the associated toolbox waves2Foam, the hydrodynamic performance of a dual-OWC system consisting of one on-shore and one offshore-stationary OWC devices is numerically investigated. The classical free surface capture method, volume of fluid (VOF) is utilized under the excitation of regular waves. The effects of the OWC chamber breadths, and the rear wall draught of the offshore device, dual-devices interval, on the wave energy conversion efficiency are explored thoroughly. The simulation shows that a larger chamber breadths ratio and a relative small rear wall draught of the front OWC device is more conducive to the wave energy extraction. Additional, a small devices interval is more beneficial for the overall extraction efficiency for the system than the big interval and a large interval should be avoided while designing.
Keywordsmarine energy dual-OWC device wave energy converter wave-structure interaction OpenFOAM
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