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A numerical framework for analyzing the coupled aero-wake-hydro-structural dynamics of large floating vertical axis wind turbines

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  • Liu, Dongsheng
  • Deng, Wanru
  • Liu, Liqin
  • Yang, Wei

Abstract

Renewed interest in floating vertical axis wind turbines (FVAWTs) has emerged with the increasing size of offshore wind turbines and their deployment in deeper waters. During operation, the dynamic characteristics of large FVAWTs are influenced by the coupling effects of intricate wake dynamics and large motions of the floating platform. In addition, the elastic deformation of blades impacts the dynamic characteristics of large FVAWTs and the formation of downward wakes. To address these coupled phenomena, this study develops a numerical framework to analyze the coupled aero-wake-hydro-structural dynamics of large FVAWTs. The reliability of the framework is verified by validating the aerodynamic performance and wake structures. Specially, by integrating the Treecode algorithm, the framework achieves remarkable computational efficiency. Utilizing a 10 MW FVAWT as a case study, the influence of platform motion and aero-elastic coupling on the wake characteristics and power performance is systematically examined. The results demonstrate that platform motion enlarges the wake expansion and offsets the wake center. Blade deformation increases the wake diffusion and affects the wake recovery. Moreover, platform motion and aero-elastic coupling impact the spanwise distribution of the power coefficient. This study provides a comprehensive framework for the dynamic evaluation of large FVAWTs in the near-wake flow.

Suggested Citation

  • Liu, Dongsheng & Deng, Wanru & Liu, Liqin & Yang, Wei, 2025. "A numerical framework for analyzing the coupled aero-wake-hydro-structural dynamics of large floating vertical axis wind turbines," Energy, Elsevier, vol. 335(C).
    • Handle: RePEc:eee:energy:v:335:y:2025:i:c:s0360544225035832
    DOI: 10.1016/j.energy.2025.137941
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