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Wind and Structures Volume 40, Number 5, May 2025 (Special Issue) pages 293-320 DOI: https://doi.org/10.12989/was.2025.40.5.293 |
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Enhancement of the efficiency of Savonius vertical axis wind turbine with airfoil enclosure system |
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Daniel Gemayel, Athanasios Verros, Mohamed Abdelwahab and Haitham Aboshosha
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| Abstract | ||
| This study presents a series of innovative modifications to the traditional Savonius-Wind-Turbine (SWT) design, aiming to boost its performance for utilization in metropolitan areas with low wind speeds. The advancements include five key parts: (i) Integration of an Airfoil Enclosure System (AES) around the rotor to prevent wind interference with the returning blades and to accelerate airflow. (ii) Assessing the effects of gaps within the AES. (iii) Developing a new airfoil-shaped blade profile that harnesses lift and drag forces simultaneously. (iv) Implementation of a big shaft within the novel rotors to allow for the generator's installation and evaluation of its effect. (v) Investigation of the optimum vertical gap in the AES. The result of these enhancements demonstrated a remarkable increase in efficiency (CP=0.3) by a factor of 2.3 versus the conventional/traditional SWT design (CP=0.13). This significant improvement was achieved with a three-bladed rotor featuring a novel airfoil-shaped blade profile, a 60 mm rotor shaft, and the AES containing a 100 mm vertical gap. | ||
| Key Words | ||
| Airfoil Enclosure System (AES); Computational Fluid Dynamics (CFD); Large Eddy Simulations (LES); Savonius Wind Turbine; Vertical Axis Wind Turbine (VAWT) | ||
| Address | ||
| Daniel Gemayel:Civil Engineering Department, Toronto Metropolitan University, 350 Victoria, St. M5B 2K3, Toronto, Canada Athanasios Verros:Civil Engineering Department, Toronto Metropolitan University, 350 Victoria, St. M5B 2K3, Toronto, Canada Mohamed Abdelwahab:Civil Engineering Department, Toronto Metropolitan University, 350 Victoria, St. M5B 2K3, Toronto, Canada Haitham Aboshosha:Civil Engineering Department, Toronto Metropolitan University, 350 Victoria, St. M5B 2K3, Toronto, Canada | ||