The aim of the present paper is to investigate ways of improving the efficiency of a six-bladed Savonius rotor. The efficiency of Savonius machines is low because of the “negative drag” exerted on the convex part of the blades and also because the torque of standard Savonius rotors varies substantially during one rotation and therefore affects the self starting of the rotor at certain wind angles. Improvement of the efficiency of the Savonius rotor is carried out by increasing the number of blades and also by preventing the wind from impinging on the convex parts. The latter can be done by hiding the convex part of the blades behind a shield or a vane. The present paper shows the results of two-dimensional computational fluid dynamics (CFD) computations, indicating a promising increase of the power coefficient from 0.3 to 0.5.
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November 2011
Technical Briefs
Numerical Study of a Six-Bladed Savonius Wind Turbine
Binyet Emmanuel,
Binyet Emmanuel
Fluid Machinery Department,
e-mail: emmanuelbinyet@hotmail.com
Huazhong University of Science and Technology
, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
Search for other works by this author on:
Wang Jun
Wang Jun
Fluid Machinery Department,
e-mail: wangjhust@163.com
Huazhong University of Science and Technology
, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
Search for other works by this author on:
Binyet Emmanuel
Fluid Machinery Department,
Huazhong University of Science and Technology
, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
e-mail: emmanuelbinyet@hotmail.com
Wang Jun
Fluid Machinery Department,
Huazhong University of Science and Technology
, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
e-mail: wangjhust@163.com
J. Sol. Energy Eng. Nov 2011, 133(4): 044503 (5 pages)
Published Online: October 18, 2011
Article history
Received:
November 18, 2010
Revised:
June 28, 2011
Online:
October 18, 2011
Published:
October 18, 2011
Citation
Emmanuel, B., and Jun, W. (October 18, 2011). "Numerical Study of a Six-Bladed Savonius Wind Turbine." ASME. J. Sol. Energy Eng. November 2011; 133(4): 044503. https://doi.org/10.1115/1.4004549
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