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Open AccessArticle

Design and Testing of a LUT Airfoil for Straight-Bladed Vertical Axis Wind Turbines

by 1,2,3, 4,5,6,7,*, 1,2,3, 1,2,3, 1,2,3, 1,2,3, 8 and 8
1
School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2
Gansu Provincial Technology Centre for Wind Turbines, Lanzhou 730050, China
3
Key Laboratory of Fluid machinery and Systems, Lanzhou 730050, China
4
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
5
State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
6
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China
7
Key Laboratory of Hydrodynamics (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China
8
Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(11), 2266; https://doi.org/10.3390/app8112266
Received: 29 September 2018 / Revised: 11 November 2018 / Accepted: 13 November 2018 / Published: 16 November 2018
(This article belongs to the Special Issue Wind Turbine Aerodynamics)
The airfoil plays an important role in improving the performance of wind turbines. However, there is less research dedicated to the airfoils for Vertical Axis Wind Turbines (VAWTs) compared to the research on Horizontal Axis Wind Turbines (HAWTs). With the objective of maximizing the aerodynamic performance of the airfoil by optimizing its geometrical parameters and by considering the law of motion of VAWTs, a new airfoil, designated the LUT airfoil (Lanzhou University of Technology), was designed for lift-driven VAWTs by employing the sequential quadratic programming optimization method. Afterwards, the pressure on the surface of the airfoil and the flow velocity were measured in steady conditions by employing wind tunnel experiments and particle image velocimetry technology. Then, the distribution of the pressure coefficient and aerodynamic loads were analyzed for the LUT airfoil under free transition. The results show that the LUT airfoil has a moderate thickness (20.77%) and moderate camber (1.11%). Moreover, compared to the airfoils commonly used for VAWTs, the LUT airfoil, with a wide drag bucket and gentle stall performance, achieves a higher maximum lift coefficient and lift–drag ratios at the Reynolds numbers 3 × 105 and 5 × 105. View Full-Text
Keywords: airfoil design; aerodynamic; wind tunnel experiment; VAWTs (Vertical axis wind turbines) airfoil design; aerodynamic; wind tunnel experiment; VAWTs (Vertical axis wind turbines)
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Li, S.; Li, Y.; Yang, C.; Zhang, X.; Wang, Q.; Li, D.; Zhong, W.; Wang, T. Design and Testing of a LUT Airfoil for Straight-Bladed Vertical Axis Wind Turbines. Appl. Sci. 2018, 8, 2266.

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