On the Performance of a Modified Triple Stack Blade Savonius Wind Turbine as a Function of Geometrical Parameters

Reza Norouztabar, Seyed Soheil Mousavi Ajarostaghi, Seyed Sina Mousavi, Payam Nejat, Seyed Saeid Rahimian Koloor and Mohamed Eldessouki ()
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Reza Norouztabar: Department of Mechanical Engineering, Mazandaran University of Science and Technology, Babol 47166-85635, Iran
Seyed Soheil Mousavi Ajarostaghi: Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
Seyed Sina Mousavi: Department of Civil Engineering, Babol Noshirvani University of Technology, Babol 47148-71167, Iran
Payam Nejat: Advanced Building and Environment Research (ABER), 99420 Weimar, Germany
Seyed Saeid Rahimian Koloor: Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 461 17 Liberec, Czech Republic
Mohamed Eldessouki: Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 461 17 Liberec, Czech Republic

Sustainability, 2022, vol. 14, issue 16, 1-26

Abstract: The Savonius wind turbine is one of the most well-known vertical axis wind turbines with insensitivity to wind direction, flow turbulence, and high torque generation. These turbines can extract up to 20% of the energy from the wind. This study numerically analyzes the performance of a modified Savonius wind turbine equipped with secondary blades and slots. The k-ε standard method is used to simulate the turbulence flow around the turbine, and the simulation is performed using the ANSYS FLUENT 18.2 commercial code. The effects of distance between the main blade and the secondary blade, position of the secondary blade, the width of the main blade’s slot, and the profile of the secondary blade on the produced torque are studied and analyzed. The simulation is performed at four wind velocities: 3, 4, 5, and 6 m/s. The results showed that the output torque at the secondary blade angular position β = 130 is higher than other angles. Furthermore, by increasing the radius of the additional blade from R = 25 to 43 mm, the torque is improved, and the area below the output torque curve is increased. Moreover, the results showed that creating a slot on the main blade equipped with a secondary blade has a significant impact on the produced torque; however, the geometrical parameters of the proposed rotors should be adjusted accurately to find the best case in terms of the produced torque.

Keywords: renewable energy; vertical axis wind turbine; savonius; torque (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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