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Savonius wind turbine

About: Savonius wind turbine is a research topic. Over the lifetime, 333 publications have been published within this topic receiving 6521 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, a new approximate stream tube method is developed to predict the momentum, lift, and drag forces on the rotor surfaces by the air stream on the basis of an integral force balance on the turbine blades.
Abstract: This paper develops a new approximate model to predict the pressure and momentum forces on a Savonius-style vertical axis wind turbine. Flow distributions through and around the turbine are examined for analytical predictions of the torque and power output, at all rotor angles. A new approximate streamtube method is developed to predict the momentum, lift, and drag forces on the rotor surfaces by the air stream on the basis of an integral force balance on the turbine blades. Unlike other past analytical methods, the technique predicts both momentum and pressure forces imposed on the rotor surface during operation. The calculated results are validated against experimental data and numerical predictions from computational fluid dynamics. Copyright © 2012 John Wiley & Sons, Ltd.

3 citations

Journal ArticleDOI
TL;DR: In this article, the influence of guide vanes on the performance of the Savonius rotor was investigated. And the authors concluded that the power that generated by the rotor with the help of the vanes increase significantly compared with the rotor without the guidance vanes.
Abstract: This work experimentally studied the influence of guide vane design to increase Savonius rotor performance. Guide vane is one of additional device that its function is for directing wind stream on to concave blade and deserves as obstacle of the wind that flowing on to convex blade. That way increased wind speeds to the rotor, consequently it produced higher power coefficient and the Savonius rotor performed better performance. Four designs of guide vane were arranged in this study. They are basic design of guide vane and basic design of guide vane that added a tilt angle on the top and bottom sides by 15°, 30°, and 45°. The result concludes that guide vane affects the performance of Savonius rotor. The power that generated by the rotor with guide vanes increase significantly compared with Savonius rotor without guide vane. The maximum improvement was attained up to 65.89%.

3 citations

Dissertation
01 Jun 2015
TL;DR: In this article, the main objective is intended to be the experimental investigation in wind tunnel to determine the structure of the real flow in a fixed Savonius wind turbine, and a secondary objective of this experimental study will be to obtain the aerodynamic performance of studied wind turbine and also information about velocity field around the rotor.
Abstract: The main objective is intended to be the experimental investigation in wind tunnel to determine the structure of the real flow in a fixed Savonius wind turbine. A secondary objective of this experimental study will be to obtain the aerodynamic performance of studied wind turbine and also information about velocity field around the rotor.

3 citations

Journal ArticleDOI
02 Oct 2018
TL;DR: In this article, the influence of using five kinds of stators in the averaged moment and power coefficients of a Savonius wind rotor using computational fluid dynamics (CFD) was analyzed.
Abstract: This paper aims at verifying the influence of using five kinds of stators in the averaged moment and power coefficients of a Savonius wind rotor using computational fluid dynamics (CFD). The analyzed stators have cylindrical shape with two and three openings, one and four deflector blades and walls shaped like a wings. The equations of continuity, Reynolds Averaged NavierStokes – RANS and the Eddy Viscosity Model k-ω SST, in its Low-Reynolds approaches, with hybrid near wall treatment; are numerically solved using the commercial software Star-CCM + , based on Finite Volume Method, resulting in the fields of pressure and velocity of the flow and the forces acting on the rotor buckets. The moment and power coefficients are achieved through integration of forces coming from the effects of pressure and viscosity of the wind on the buckets device. The influence of the stators use in the moment and power coefficients is checked by changing the geometry of the device for each simulations series, keeping the Reynolds number based on rotor diameter equal to 433,500. The obtained values for averaged moment and power coefficients indicate that for each type of stator used, there was maximum performance for a given tip speed ratio of rotor. Improvement in performance over the operation without stator was obtained only to the operations using stator with four deflector blades and to the stator with cylindrical shape with three openings. The improvement percentage in performance obtained for the best condition (use of four deflector blades at tip speed ratio equal to 1) is 12% compared to the performance of the rotor operating without stator.

3 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented the CFD-numerical investigation of novel drag-driven wind turbine blade inspired by spiral optimisation algorithm (SPO) and cycloid curve.
Abstract: This paper presents the CFD numerical investigation of novel drag-driven wind turbine blade inspired by spiral optimisation algorithm (SPO) and cycloid curve. In this study, six hybrid spiral geome...

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20222
202123
202056
201958
201828
201726