CFD Simulation of a Multi-Rotor FOWT in Extreme Waves and Winds

摘要

In recent years, the requirement for renewable energydevelopment grows rapidly. To extract the clean energy fromwind power effectively, various types of offshore windturbines are designed for large-scale industrial application.Prediction of the loads on and motions of a floating offshorewind turbine (FOWT) system under both wave and windconditions is of great importance for safety and optimizationdesign. Numerical simulation of a FOWT system underextreme wave condition with the consideration of wind turbineeffect is our research focus in the present study.In this study, a CIP based Cartesian grid solver RIAMCMENis extended for simulation of a new-type FOWTsystem. The wind turbines on the platform are calculated by anactuator line model (ACL), in which the rotator blades arerepresented by smeared blade force distributed along theactuator line. Both the wave-body interaction and wind turbineinterference are considered.