Effect of additional cylinders on power-extraction performance of a Savonius vertical-axis wind turbine

• Published in: Journal of Zhejiang University. A. Science Vol. 24; no. 6; pp. 531 - 542
• Main Authors: Yan, Yangyang, Zhang, Jintao, She, Junao, Liu, Wenhao, Deng, Jianghong, Zhu, Jianyang
• Format: Journal Article
• Language: English
• Published: Hangzhou Zhejiang University Press 01.06.2023; Springer Nature B.V; Institute of Robotics and Intelligent Systems,Wuhan University of Science and Technology,Wuhan 430081,China%Key Laboratory of Metallurgical Equipment and Control Technology,Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China
• Subjects: Civil Engineering; Classical and Continuum Physics; Cylinders; Engineering; Experimental methods; Fluid flow; Industrial Chemistry/Chemical Engineering; Mathematical models; Mechanical Engineering; Numerical methods; Research Article; Taguchi methods; Turbine blades; Turbines; Vertical axis wind turbines; Wind effects; Wind power; Wind speed; 田口实验方法; Additional cylinders; Savonius型垂直轴风力机; Savonius vertical-axis wind turbine (S-VAWT); Wind-induced rotation; 附加圆柱; Average power coefficient; 平均功率系数; 风致转动; Taguchi experimental method; Savonius vertical-axis wind turbine(S-VAWT)
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.A2200292

To improve the power-extraction performance of the Savonius vertical-axis wind turbine (S-VAWT), additional cylinders, which are used to control the fluid flow around the wind turbine blade, were introduced into the blade design. In contrast to the traditional numerical method, a mathematical model in the form of a dynamical system was used in this study. A numerical calculation program that could effectively solve the equations of wind-induced rotation of S-VAWT was developed, and combined with the Taguchi experimental method to investigate the influence of additional cylinders on the power-extraction characteristics of the S-VAWT. The results showed that the additional cylinders have a significant impact on the power-extraction performance of the S-VAWT. At 4-m/s wind speed, the average power coefficient of the S-VAWT with additional cylinders is 15% higher than that of the conventional S-VAWT. After construction of the wind turbine prototype and power-extraction tests, the results showed that compared with a conventional S-VAWT, the output power was 29% higher for the S-VAWT with additional cylinders under the same particular conditions.