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

Article

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. https://doi.org/10.1016/j.aej.2016.07.005
Article Title

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

ERA Journal ID44460
Article CategoryArticle
AuthorsAl-Faruk, Abdullah (Author) and Sharifian, Ahmad (Author)
Journal TitleAlexandria Engineering Journal
Journal Citation55 (3), pp. 2055-2064
Number of Pages10
Year2016
PublisherElsevier
ISSN1110-0168
2090-2670
Digital Object Identifier (DOI)https://doi.org/10.1016/j.aej.2016.07.005
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S1110016816301776
Abstract

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.

Keywordswind energy; Savonius wind turbine; swirling flow; power coefficient; split channels
ANZSRC Field of Research 2020401201. Aerodynamics (excl. hypersonic aerodynamics)
401799. Mechanical engineering not elsewhere classified
400803. Electrical energy generation (incl. renewables, excl. photovoltaics)
Byline AffiliationsComputational Engineering and Science Research Centre
Institution of OriginUniversity of Southern Queensland
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