Numerical investigation into performance of Savonius wind turbine equipped with inner blades: Overlap ratio effect

IF 1.5 Q4 ENERGY & FUELS Wind Engineering Pub Date : 2023-11-04 DOI:10.1177/0309524x231205282
Mohammad Mahdi Hassanshahi, Masoud Kharati-Koopaee
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Abstract

This research focuses on the effect of overlap ratio on the performance of Savonius rotor in the presence of inner blades in such a way that inner blade tip is parallel to the main blade tip and root. Findings reveal that at low overlap ratios, using inner blade that the inner blade tip is parallel to the main blade root leads to a higher power and torque coefficients than the other inner blade configuration and also conventional rotor. This research indicates that for the overlapped rotor and for the two inner blade configurations, the higher power and torque coefficients could be obtained at high and low tip speed ratios, respectively. Results show that for both inner blade configurations, the overlapped rotors overcome the negative torque generated by the non-overlapped one. It is also shown that at high overlap ratio, using inner blade has no advantage over the conventional rotor.
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内叶片Savonius风力机性能的数值研究:重叠比效应
本文主要研究了内叶存在时,当内叶尖端平行于主叶尖端和根部时,重叠比对Savonius转子性能的影响。结果表明,在低重叠比条件下,采用内叶与主叶根平行的内叶结构可以获得比其他内叶结构和常规转子更高的功率和扭矩系数。研究表明,对于重叠转子和双内叶构型,在高、低叶尖速比时可以获得较高的功率系数和转矩系数。结果表明,对于两种内叶构型,重叠转子均能克服非重叠转子产生的负转矩。在高重叠比下,采用内叶并不比常规转子具有优势。
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来源期刊
Wind Engineering
Wind Engineering ENERGY & FUELS-
CiteScore
4.00
自引率
13.30%
发文量
81
期刊介绍: Having been in continuous publication since 1977, Wind Engineering is the oldest and most authoritative English language journal devoted entirely to the technology of wind energy. Under the direction of a distinguished editor and editorial board, Wind Engineering appears bimonthly with fully refereed contributions from active figures in the field, book notices, and summaries of the more interesting papers from other sources. Papers are published in Wind Engineering on: the aerodynamics of rotors and blades; machine subsystems and components; design; test programmes; power generation and transmission; measuring and recording techniques; installations and applications; and economic, environmental and legal aspects.
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