DOI: https://doi.org/10.14710/ijred.2020.30286

CFD Investigation of A New Elliptical-Bladed Multistage Savonius Rotors

1Laboratory of Renewable Energy, Faculty of Science, Ibn Tofail University, Kenitra, Morocco

2Laboratoire D’ingénierie, Management Industriel et Innovation Université Hassan, Settat, Morocco

Received: 17 Apr 2020; Revised: 25 Jun 2020; Accepted: 29 Jun 2020; Available online: 1 Jul 2020; Published: 15 Oct 2020.
Editor(s): H. Hadiyanto
Open Access Copyright (c) 2020 The Authors. Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract
The Savonius-conventional wind turbine is a class of wind turbines designed with a vertical axis. It has a good starting capacity and   an insensitivity to wind direction. It works relatively at low wind speed in an easy installation. Savonius wind turbine faces major drawbacks, including some of the low efficiency and high negative torque created by the returning blade. Many attempts have been undertaken to optimize the blade’s shape to increase the performance of these wind turbines. The vertical axis is still under development. The elliptical-blades with a cut angle equal 47.50° have recently shown enhanced performance. In this study, we investigate the effect of Elliptical-bladed multistage Savonius Rotors (rotor aspect ratio, stage aspect ratio) on the performance by means of numerical simulation. The results obtained by comparison of one, two, and three-stage rotors indicate that the maximum power coefficient increase with a number of the stages (for the rotors with similar RAR of 0.7). Moreover, for the rotors with similar SAR of 0.7, the two stages have the highest performance than others.
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Keywords: Savonius rotor; Wind energy; multistage; numerical simulation

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Section: Original Research Article
Language : EN
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