WIND TURBINE AIRFOIL DYNAMIC STALL OPTIMIZATION AND AERODYNAMIC CHARACTERIZATION ANALYSIS

Zhang Qiang; Chang Linsen; Miao Weipao; Li Chun; Yue Minnan; Kuang Liu

doi:10.19912/j.0254-0096.tynxb.2024-1018

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 680-688. DOI: 10.19912/j.0254-0096.tynxb.2024-1018

WIND TURBINE AIRFOIL DYNAMIC STALL OPTIMIZATION AND AERODYNAMIC CHARACTERIZATION ANALYSIS

Zhang Qiang¹, Chang Linsen¹, Miao Weipao^1,2, Li Chun^1,2, Yue Minnan^1,2, Kuang Liu³

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Abstract

Dynamic stall induced by flow separation during the rotation of wind turbine blades can make the aerodynamic forces deteriorate drastically. In order to improve the dynamic stall characteristics of the airfoil, an aerodynamic optimization framework of the airfoil based on a surrogate model is established. The S809 airfoil is taken as the research object. First, the airfoil is parametrically characterized, and the input vectors of the model training samples are obtained by Latin hypercube sampling, and the corresponding response values are solved by CFD method. Secondly, the surrogate model of aerodynamic shape and aerodynamic force of the airfoil is constructed by Gaussian process regression, and the model accuracy is improved by the infill point criterion. Finally, with the objective of reducing the aerodynamic fluctuations, the aerodynamic forces of one pitch cycle are optimized and designed by combining the global optimization algorithm. The results show that compared with the baseline airfoil, the change of aerodynamic shape of the optimized airfoil significantly reduces the drag and moment fluctuations, and effectively suppresses the dynamic stall in the airfoil leading edge during the pitch-down phase.

Key words

wind turbine / dynamic stall / surrogate model / airfoil optimization / aerodynamic analysis

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Zhang Qiang, Chang Linsen, Miao Weipao, Li Chun, Yue Minnan, Kuang Liu. WIND TURBINE AIRFOIL DYNAMIC STALL OPTIMIZATION AND AERODYNAMIC CHARACTERIZATION ANALYSIS[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 680-688 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1018

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