Computational Analysis of Platform Motion and Wave Effects on the Aerodynamics and Wake of the IEA 22 MW Floating Wind Turbine South China University of Technology, Shien-Ming Wu School o.

Format:

Book

Conference/Event

Author/Creator:

Xie, Bin, author.

Sun, Haiying, author.

Chen, Ye, author.

Conference Name:

2025 2nd International Conference on Sustainable Development and Energy Resources (SDER 2025) (2025-08-01 : Shenzhen, China)

Language:

English

Subjects (All):

Agricultural vehicles and equipment.

Aerodynamics.

Wind power.

Pitch.

Stall.

Optimization.

Turbulence.

Computational fluid dynamics (CFD).

Imaging and visualization.

Research and development.

Local Subjects:

Agricultural vehicles and equipment.

Aerodynamics.

Wind power.

Pitch.

Stall.

Optimization.

Turbulence.

Computational fluid dynamics (CFD).

Imaging and visualization.

Research and development.

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2026

Summary:

This study investigates the unsteady aerodynamic response, wake evolution, and vortex dynamics of an ultra-large floating offshore wind turbine (FOWT) under coupled motionwave conditions. A high-fidelity aerohydrodynamic CFD model is employed for the IEA 22 MW reference turbine. Platform pitch and surge motions are prescribed via sinusoidal functions, and wave conditions are independently introduced by considering two representative sea states (H = 4 m and 7 m) and a no-wave case. Results show that pitch and combined pitchsurge motions significantly amplify unsteady aerodynamic effects, increasing peak power from 81.1 MW (P5S0) to 92.6 MW (P5S5), with periodic negative power output and severe dynamic stall. Under strong motion, waves further raise peak power to 93.4 MW (H7P5S5), indicating a coupled amplification effect. Dynamic stall is mainly triggered by pitch motion, expanding in scope and duration with motion amplitude; wave effects on stall remain limited. Platform motion also enhances wake recovery by increasing inflow shear and turbulence, leading to higher turbulent kinetic energy (TKE) and a reduced velocity deficit (ΔŪ). Waves compress the low-speed wake core and reduce ΔŪ from 0.248 (no-wave case) to 0.204 under H7 conditions at x/D = 3.0, with the effect being particularly evident under combined motion. Vortex visualization reveals that platform movement leads to vortex merging, ring thickening, and deflection, with combined motion creating the strongest mixing. Wave-generated vortices interact with tip vortices near the surface, becoming more intense under larger wave heights. In general, platform motion is the main factor in FOWT unsteady aerodynamics, while waves have secondary but cooperative effects by changing inflow structures and aiding wake recovery. This study offers theoretical support and engineering guidance for aerodynamic design optimization and wind farm layout of next-generation ultra-large floating offshore wind turbines

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