Geometrical optimization of a swirling Savonius wind turbine using an open jet wind tunnel

Al-Faruk, Abdullah and Sharifian, Ahmad (2016) Geometrical optimization of a swirling Savonius wind turbine using an open jet wind tunnel. Alexandria Engineering Journal, 55 (3). pp. 2055-2064. ISSN 1110-0168

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It has been suggested that waste heats or naturally available heat sources can be utilized to produce swirling flow by a design similar to that of split channels which is currently used to initiate fire whirls in laboratories. The new design combines the conventional Savonius wind turbine
and split channel mechanisms. Previous computational and preliminary experimental works indicate a performance improvement in the new design (named as swirling Savonius turbine) compared to the conventional Savonius design. In this study, wind tunnel experiments have been carried out
to optimize the swirling Savonius turbine geometry in terms of maximum power coefficient by considering several design parameters. The results indicate that the blade overlap ratio, hot air inlet diameter and the condition of the top end plate have significant influence on power and torque coefficients, while a larger aspect ratio and closed top end plate have some favourable effects on the performance.
The optimum configuration has been tested in four different wind velocities to determine its influence on the performance, and power coefficients were found to be higher in high wind velocities.
The performance comparison of optimum configuration with conventional Savonius rotor showed an increase of 24.12% in the coefficient of power.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This is an open access article under the CC BY-NC-ND license (
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 30 Sep 2016 02:34
Last Modified: 24 Jan 2018 00:53
Uncontrolled Keywords: wind energy; Savonius wind turbine; swirling flow; power coefficient; split channels
Fields of Research : 09 Engineering > 0901 Aerospace Engineering > 090101 Aerodynamics (excl. Hypersonic Aerodynamics)
09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Socio-Economic Objective: B Economic Development > 85 Energy > 8504 Energy Transformation > 850499 Energy Transformation not elsewhere classified
B Economic Development > 85 Energy > 8502 Mining and Extraction of Energy Resources > 850202 Geothermal Energy Extraction
B Economic Development > 85 Energy > 8505 Renewable Energy > 850506 Solar-Thermal Energy
B Economic Development > 85 Energy > 8505 Renewable Energy > 850509 Wind Energy
Identification Number or DOI: 10.1016/j.aej.2016.07.005

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