Review of Application of VOF-Based NWT on Integrated OWC System

Abstract - Oscillating water column is the most widely used ocean energy converting systems all over theworld. The operating performance is influenced by the efficiencies of the two converting stages in the OWCchamber-turbine integrated system. In order to consider the effects of the turbine, the orifice model are carriedout. The VOF based Numerical Wave Tank (NWT) is utilized to simulate the water column oscillation insidethe chamber and the results are compared with corresponding experimental data. This paper reviews the stateof the art in interaction among wave elevation inside the chamber and air flow rate in the duct, which are con-sidered the turbine effects. Effects of incident wave conditions and several shape parameters on the operatingperformance of OWC chamber are investigated numerically. The effects of the impulse turbine on the integratedsystem and interaction among the wave elevation, pressure and air flow velocities variations are investigated.Keywords: Integrated System(통합시스템), Numerical Wave Tank(수치조파수조), Orifice(오리피스),Oscillating Water Column(진동수주 ), Wave Energy Conversion(파력에너지변환 )