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Rotation improvement of vertical axis wind turbine by offsetting pitching angles and changing blade numbers
Sun,Xuejing1; Zhu,Jianyang2; Li,Zongjin1; Sun,Guoxing1
2021-01-15
Source PublicationEnergy
ISSN0360-5442
Volume215
AbstractTo improve the power extraction performance and self-starting characteristics of the vertical axis wind turbine (VAWT), the effect of offsetting pitching angles and blade numbers on the performance of a wind-induced rotation VAWT has been systematically investigated. Different from the conventional numerical and experimental approach, the rotation velocity of the turbine is driven by the aerodynamic torque of the blade in the present study. The flow around the turbine was simulated using Fluent 6.3 code, and the governing equation of the turbine's rotation was coupled to the code through UDF. The optimized pitching angle β was found to be of −4°, at which the maximum 5.89 and 5.14 times average power increasing were achieved for the turbine with 5-blades and 3-blades, respectively. Moreover, shorter self-starting time was also observed for the turbine with β = −4° at larger wind velocity (>9 m/s). In addition, the influence of the blade number on the performance of the turbine depended on the wind velocity. The analysis of the flow field of the turbine showed that the offsetting pitching angle and blade number could suppress or delay the vortex separation, and therefore improve the overall performance of the turbine.
KeywordBlade number Mean power coefficient Offsetting pitching angle Self-starting characteristic Vortex separation
DOI10.1016/j.energy.2020.119177
URLView the original
Language英语
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorZhu,Jianyang
Affiliation1.Institute of Applied Physics and Materials Engineering,University of Macau,Taipa,Avenida da Universidade,China
2.Institute of Robotics and Intelligent Systems,Wuhan University of Science and Technology,Wuhan,430081,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Sun,Xuejing,Zhu,Jianyang,Li,Zongjin,et al. Rotation improvement of vertical axis wind turbine by offsetting pitching angles and changing blade numbers[J]. Energy,2021,215.
APA Sun,Xuejing,Zhu,Jianyang,Li,Zongjin,&Sun,Guoxing.(2021).Rotation improvement of vertical axis wind turbine by offsetting pitching angles and changing blade numbers.Energy,215.
MLA Sun,Xuejing,et al."Rotation improvement of vertical axis wind turbine by offsetting pitching angles and changing blade numbers".Energy 215(2021).
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