Performance Analysis of a Helical Savonius Wind Turbine with Modified Rotor
Ahmed S. Saad,Ali M. Abdelsalam,I.M. Sakr,Wageeh A. El-Askary +3 more
- Vol. 17, pp 1-14
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TLDR
In this paper, the authors investigated numerically the performance of a helical Savonius wind rotor with a twist angle of 45°, where the twist is performed on a modified profile of the rotor blade.Abstract:
This study aims to investigate numerically the performance of a helical Savonius wind rotor with a twist angle of 45°. The twist is performed on a modified profile of the rotor blade. The power coefficient (Cp), the torque coefficient (CT), and the static torque coefficient (CTS) are computed under a constant aspect ratio of 1.0 and overlap ratio of 0.15. The numerical results presented in this paper are obtained using the three-dimensional incompressible unsteady Reynolds-Averaged Navier-Stokes equations along with the RNG k-e turbulence model. A comparison between the present helical Savonius wind turbine of modified rotor and the helical Savonius wind turbine of conventional rotor shows better performance for the present modification. The maximum power coefficient and the maximum torque coefficient for the present helical modified rotor are 0.22 and 0.41, respectively.read more
Citations
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Investigating the performance of a twisted modified Savonius rotor
TL;DR: In this paper, the performance of a twisted modified Savonius rotor at various twisting angles was investigated in front of a free air jet and the computations were performed using the three-dimensional incompressible unsteady Reynolds-Average Navier-Stokes (RANS) equations along with the RNG k-e turbulence model.
Journal ArticleDOI
Experimental and Theoretical Studies for Improving the Performance of a Modified Shape Savonius Wind Turbine
TL;DR: In this article, the performance of a 45-degrees twisted Savonius rotor with a modified profile, at various overlap ratios (δ), aspect ratios (AR), and wind velocity (V), was evaluated on a free air jet test rig.
Journal ArticleDOI
A review on modifications and performance assessment techniques in cross-flow hydrokinetic system
Md. Mustafa Kamal,R.P. Saini +1 more
TL;DR: In this article , the authors summarized the modifications done by various researchers on single and hybrid cross-flow HKT (hydrokinetic turbine) to enhance turbine performance characteristics and made an effort to present the experimental and numerical techniques for performance assessment of the crossflow hydrokinetic system.
Peer Review
Influence of Design Parameters on the Performance of Savonius Wind Turbine
TL;DR: In this paper , the influence of various design and performance parameters (aspect ratio, overlap ratio, tip speed ratio, blade shape, number of rotor blades and number of stages), turbulence models and turbine geometries on the performance of Savonius vertical axis wind turbine was investigated.
References
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Journal ArticleDOI
Evaluation of different turbine concepts for wind power
TL;DR: In this paper, three different wind turbines are considered; the horizontal axis wind turbine and two different concepts of vertical axis wind turbines; the Darrieus turbine and the H-rotor, and a case study is presented where three different turbines are compared to each other.
Journal ArticleDOI
Wind tunnel performance data for two- and three-bucket Savonius rotors
TL;DR: In this article, a Savonius rotor wind turbine was tested in the Vought Corporation Systems Division 4.9- x 6.1m Low Speed Wind Tunnel to determine aerodynamic performance.
Journal ArticleDOI
A review on the performance of Savonius wind turbines
TL;DR: In this paper, the authors present a review on the performance of Savonius wind turbines and present relevant information about their performance, bringing a discussion about the performance and benefits of using this type of turbines.
Journal ArticleDOI
Optimal blade shape of a modified Savonius turbine using an obstacle shielding the returning blade
TL;DR: In this article, the geometry of the blade shape (skeleton line) was optimized in the presence of the obstacle plate to increase the output power of a Savonius turbine.
Journal ArticleDOI
Performance tests on helical Savonius rotors
TL;DR: In this paper, a helical Savonius rotor with a twist of 90° was proposed to decrease the variation in static torque from 0° to 360°, and the performance of the helical rotor with and without shaft was compared in an open jet wind tunnel.