AERODYNAMIC RESPONSE ANALYSIS OF BACK-SWEPT WIND TURBINE BASED ON CO-SIMULATION

Li Hao; Xia Hongjian; Li Deyuan; Wu Junlin

doi:10.19912/j.0254-0096.tynxb.2022-0338

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 447-455. DOI: 10.19912/j.0254-0096.tynxb.2022-0338

AERODYNAMIC RESPONSE ANALYSIS OF BACK-SWEPT WIND TURBINE BASED ON CO-SIMULATION

Li Hao, Xia Hongjian, Li Deyuan, Wu Junlin

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Abstract

Because the back-swept blade is constructed by bending the stacking line, the elastic shaft and torsional shaft are separated which enhances the coupling effect of bending and torsional deformation and the nonlinear characteristics of structural deformation. Furthermore, there is an obvious three-dimensional flow phenomenon along the blade span wise. In order to accurately simulate the structural vibration, deformation and aerodynamic load of a swept wind turbine, the blade and tower structures of the wind turbine are discretized by the super element method, and the rigid-flexible coupling multi-body dynamics model of the whole wind turbine is established. Because the vibration and deformation of back-swept blade when operation should result in the three-dimensional air flow along the blade, the helical trailing vortex method is also applied to compute the aerodynamic load on the blade. In order to simulate the wind turbine with the coupling of mechanism and air fluid, the structural model of wind turbine is built by using the multi-body dynamics software, and the aerodynamic load is computed by the Matlab, and the Simulink with co-simulation function is used to integrate the structural model and aerodynamic model. Accordingly, the structural and aerodynamic response of the wind turbine with the back-swept blades is able to be analyzed in the co-simulation system. The numerical simulation results show that the theoretical model and the method presented in this paper can effectively simulate the nonlinear deformation and aero-elastic coupling characteristics of the back-swept wind turbine. It is useful to design the wind turbine with the back-swept blade and analyze its aero-elastic performance.

Key words

wind turbines / back-swept blade / aeroelastic coupling / co-simulation / lift line / steady state response

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Li Hao, Xia Hongjian, Li Deyuan, Wu Junlin. AERODYNAMIC RESPONSE ANALYSIS OF BACK-SWEPT WIND TURBINE BASED ON CO-SIMULATION[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 447-455 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0338

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