AERODYNAMIC SHAPE OPTIMIZATION OF WIND TURBINE AIRFOIL BASED ON LOW SPEED PRECONDITIONING

Wang Qing; Zhang Min; Li Deshun; Li Shoutu

doi:10.19912/j.0254-0096.tynxb.2020-0441

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 351-358. DOI: 10.19912/j.0254-0096.tynxb.2020-0441

AERODYNAMIC SHAPE OPTIMIZATION OF WIND TURBINE AIRFOIL BASED ON LOW SPEED PRECONDITIONING

Wang Qing^1,2, Zhang Min^1,2, Li Deshun^1,2, Li Shoutu^1,2

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Abstract

In this research, the airfoil aerodynamic shape optimization aiming to improve the lift-drag ratio is performed based on the S809 airfoil by employing the sequential quadratic programming method and low speed preconditioning method. The optimized airfoil has large leading edge radius and flat upper surface. The simulated results indicated that the lift-drag ratio is increased about 43.3% at design state 1, and increased about 48.9% at design state 2. Further numerical verifications indicate that the maximum lift coefficient is increased from 1.140 to 1.297 at Reynolds number of 5.0×10⁵, and increased from 1.236 to 1.418 at Reynolds number of 1.0×10⁶. Based on the optimized airfoil, a research of artificial modification is performed in this research to restrict the aerodynamic separation. The numerical results indicated that the modified airfoil has larger lift coefficient and smaller drag coefficient.

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wind turbines / optimization / airfoil / low speed preconditioning

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Wang Qing, Zhang Min, Li Deshun, Li Shoutu. AERODYNAMIC SHAPE OPTIMIZATION OF WIND TURBINE AIRFOIL BASED ON LOW SPEED PRECONDITIONING[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 351-358 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0441

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