Design Optimization of Savonius Rotors: An Overview

Abstract:

Since the Savonius rotor has a low starting torque and is adaptable for wind in various directions, it has received great attention in the past decades. In this paper, we present an overview of the state of the art in Savonius rotor design, according to three general strategies of design optimization: 1) Optimizing Savonius rotor structural parameters including overlap ratio, aspect ratio of the rotor, twist angle, Reynolds number, and the shaft of the rotor; 2)Adopting multi-level Savonius rotor or combining Savonius rotor with other type rotor to avoid negative torque of the rotor and improve both efficiency and starting torque; 3)Adding auxiliary devices such as curtain or guide-box to decrease the negative torque. We conclude with a discussion of the advantages and challenges associated with development of this promising technology.

• Periodical: Applied Mechanics and Materials (Volumes 58-60)
• Pages: 827-833
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.58-60.827
• Online since: June 2011
• Authors: Xiao Wen Song, Kai Yuan Cao, Zhong Rui Chen, Ke Shen
• Keywords: Low Starting Torque, Savonius Rotor, Vertical Axis Wind Turbine, Wind Power

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