Study on Aerodynamic Characteristics of a Savonius Wind Turbine with a Modified Blade

Zhongqiu Mu, Guoqiang Tong, Zhenjun Xiao, Qingyue Deng, Fang Feng, Yan Li and Garrel Van Arne
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Zhongqiu Mu: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Guoqiang Tong: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Zhenjun Xiao: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Qingyue Deng: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Fang Feng: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Yan Li: College of Engineering, Northeast Agricultural University, Harbin 150030, China
Garrel Van Arne: Faculty of Engineering Technology, University of Twente, 7500 Enschede, The Netherlands

Energies, 2022, vol. 15, issue 18, 1-13

Abstract: In order to improve the static start-up problem of Savonius wind turbines, a Savonius wind turbine with a modified blade is proposed. It was obtained by twisting the half-cylindrical blades of the basic Savonius wind turbine by 70°. The aerodynamic performance of the wind turbine before and after the modification was compared. Firstly, the static torque coefficient of two wind turbines at different azimuth angles were obtained by means of three-dimensional numerical simulation. The static flow field around the wind turbine was analyzed. Then, the output power and speed characteristics of a spiral Savonius wind turbine under different incoming wind speeds were evaluated in the wind tunnel. The results show that, compared with the Savonius wind turbine with half-cylindrical blades, the spiral wind turbine could start at any azimuths in one rotation cycle. The reverse torque was eliminated. The static torque coefficient fluctuation range was reduced by 10%. The start-up performance was effectively improved. This investigation could provide guidance for the improvement of start-up characteristics of Savonius wind turbines.

Keywords: Savonius wind turbine; spiral blade; start-up performance; numerical simulation; wind tunnel test (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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