The aerodynamics of floating offshore wind turbines in different working states during surge motion

The rotor of floating offshore wind turbines with platform motions may undergo different working states during its operation, e.g. from windmill state to vortex ring and propeller state. In this paper, an aerodynamic model based on a free wake method is used simulate the undergoing surge motion. associated change evaluated quantitatively visually. results show that full cycle motion platform, experiences alternative onset state, while later two occur only downwind rotor. load corresponding indicates most unstable phase three.