Analysis and Experimentation of Multi-S Rotors for Vertical Wind Turbine Applications

Abstract:

This article presents a new, multi-foil-blades (multi-S) rotor and compare its performance potentials with traditional (Single-S) Savomius rotor . Theoretical and experimental investigations show that the performance of the multi-S rotor is better than the other classical designs of Savonius rotor in terms of the resulting power factor. Analytical equations for power and torque factors are developed for both the single- and multi-S rotors with ideal flow assumed. These equations are proven very effective in describing the performance potentials of these rotors for a range of speed ratio less than or equals 0.7. This result is experimentally justified for both types of rotors. For speed ratios higher than 0.7, a remarkable deviation occurs between the theoretical performance measures provided by the developed equations and the experimentally measured ones. A geometric design parameter which depends on the internal construction of the proposed multi-S rotor is found to be of great impact on the attained power factor. A power factor for the multi-S rotor can be much more than that of a single-S one having the same height and outer size according to the chosen values of this design parameter.

• Periodical: Applied Mechanics and Materials (Volumes 260-261)
• Pages: 97-102
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.260-261.97
• Online since: December 2012
• Authors: E.M. ElBeheiry, W.A. El-Askary
• Keywords: Experimentation, Multi-S Rotor, Single-S Rotor, Theoretical Analysis, Wind Energy

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