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Wake Effects on A Hybrid Semi-Submersible Floating Wind Farm with Multiple Hub Heights

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Abstract

Wind farms generally consist of a single turbine installed with the same hub height. As the scale of turbines increases, wake interference between turbines becomes increasingly significant, especially for floating wind turbines (FWT). Some researchers find that wind farms with multiple hub heights could increase the annual energy production (AEP), while previous studies also indicate that wake meandering could increase fatigue loading. This study investigates the wake interaction within a hybrid floating wind farm with multiple hub heights. In this study, FAST.Farm is employed to simulate a hybrid wind farm which consists of four semi-submersible FWTs (5MW and 15MW) with two different hub heights. Three typical wind speeds (below-rated, rated, and over-rated) are considered in this paper to investigate the wake meandering effects on the dynamics of two FWTs. Damage equivalent loads (DEL) of the turbine critical components are computed and analyzed for several arrangements determined by the different spacing of the four turbines. The result shows that the dynamic wake meandering significantly affects downstream turbines’ global loadings and load effects. Differences in DEL show that blade-root flapwise bending moments and mooring fairlead tensions are sensitive to the spacing of the turbines.

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Funding

This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 51909109 and 52101314) and the Natural Science Foundation of Jiangsu Province (Grant No. BK20190967).

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Authors and Affiliations

  1. Marine Equipment and Technology Institute, Jiangsu University of Science and Technology, Zhenjiang, 212100, China

    Xiao-sen Xu, Jia-yang Gu, Hong-jie Ling & Zhong-yu Zhang

  2. Department of Mechanical and Civil Engineering, Florida Institute of Technology, Melbourne, 32901, USA

    Pu-yi Yang

  3. Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, 7491, Norway

    Shuai-shuai Wang

  4. Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, Stavanger, 4021, Norway

    Yi-han Xing

  5. College of Engineering Science and Technology, Shanghai Ocean Engineering, Shanghai, 201306, China

    Oleg Gaidai

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  1. Xiao-sen Xu
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  2. Jia-yang Gu
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  3. Hong-jie Ling
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  4. Pu-yi Yang
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  5. Shuai-shuai Wang
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  8. Zhong-yu Zhang
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Correspondence to Hong-jie Ling.

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Xu, Xs., Gu, Jy., Ling, Hj. et al. Wake Effects on A Hybrid Semi-Submersible Floating Wind Farm with Multiple Hub Heights. China Ocean Eng 37, 101–114 (2023). https://doi.org/10.1007/s13344-023-0009-3

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