Abstract
Abstract The increase in the carbon footprint and growing environmental consciousness are driving the energy sector from conventional fossil fuels to renewable energies. Since oceans provide energies in the form of winds, waves, tides and currents, substantial research has been carried out recently to exploit the ocean renewable energy. Irrespective of the type of ocean renewable energy, it is essential to have an offshore platform for energy extraction from the ocean. The present study focuses on the hydrodynamics of a SPAR type offshore platform housing a wind turbine. The existing literatures show that the frequency of extreme waves like rogue/ freak waves has increased drastically. Therefore, it is also essential to consider and study the interaction of freak wave with the offshore wind energy platforms. In this study, the freak wave impact on a Floating Offshore Wind Turbine (FOWT) SPAR platform is studied using a potential flow theory based numerical model in the time domain. The numerical model is validated using past literature data and the freak wave-structure interaction (WSI) analysis is carried out. The motions of the SPAR FOWT, freak wave related air-gap effects are investigated. The present study aims to provide preliminary insights into the effect of freak wave impact on the design of FOWT.
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