Numerical simulation on a straight-bladed vertical axis wind turbine with auxiliary blade

2016 International Conference on New Energy and Future Energy System

Li, Y.^1 ; Zheng, Y.F.^1 ; Feng, F.^2 ; He, Q.B.^1 ; Wang, N.X.^1

Engineering College, Northeast Agricultural University, Harbin, China^1

College of Science, Northeast Agricultural University, Harbin, China^2

关键词: Calculation results;    Low tip speed ratios;    Moment coefficient;    Numerical calculation;    Output characteristics;    Rotational speed;    Starting performance;    Vertical axis wind turbines;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/40/1/012062/pdf
DOI  :  10.1088/1755-1315/40/1/012062

来源: IOP

【 摘 要 】

To improve the starting performance of the straight-bladed vertical axis wind turbine (SB-VAWT) at low wind speed, and the output characteristics at high wind speed, a flexible, scalable auxiliary vane mechanism was designed and installed into the rotor of SB-VAWT in this study. This new vertical axis wind turbine is a kind of lift-to-drag combination wind turbine. The flexible blade expanded, and the driving force of the wind turbines comes mainly from drag at low rotational speed. On the other hand, the flexible blade is retracted at higher speed, and the driving force is primarily from a lift. To research the effects of the flexible, scalable auxiliary module on the performance of SB-VAWT and to find its best parameters, the computational fluid dynamics (CFD) numerical calculation was carried out. The calculation result shows that the flexible, scalable blades can automatic expand and retract with the rotational speed. The moment coefficient at low tip speed ratio increased substantially. Meanwhile, the moment coefficient has also been improved at high tip speed ratios in certain ranges.