Investigating the performance of a twisted modified Savonius rotor

El‐Askary, W. A.; Saad, Ahmed S.; Abdelsalam, Ali M.; Sakr, I.M.

doi:10.1016/j.jweia.2018.10.009

Cited by 42 publications

(11 citation statements)

References 23 publications

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“…El-Askary et al [24] tested numerically and experimentally the twist of modified blades for the Savonius rotor. Different twist angles were investigated at an overlap ratio (δ) of 0.15 and aspect ratio (AR) of 1.…”

Section: Introductionmentioning

confidence: 99%

“…Different twist angles were investigated at an overlap ratio (δ) of 0.15 and aspect ratio (AR) of 1. The modified twisted rotor attained in [24] was further optimized in their work [25] at a twist angle of 45 o for various values of δ and AR. The numerical results showed a significant improvement for the performance of the twisted modified rotor without overlapping (δ=0) and at AR=2.…”

Section: Introductionmentioning

confidence: 99%

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Performance Investigation of Two Vertical-Axis Twisted Rotor Models

Sakr

Abdelsalam

Yousef

et al. 2022

ERJ. Engineering Research Journal

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The world nowadays is looking for a clean source of renewable energy that produces no air or water pollution. Wind energy has become an optimal solution for world needs and the governments offer great attention to wind-energy development. In the present work, two outstanding Savonius rotor models are first investigated numerically using the three-dimensional unsteady Reynolds-averaged Navier-Stokes (URANS) equations, along with the Shear Stress Transport (SST) k-ω turbulence model. Various twist angles are trained for both rotor models and the best efficient model is further fabricated and tested experimentally using an open jet wind tunnel. The numerical and experimental results show good agreement, and the proposed rotor geometry has superior performance. The maximum power coefficient obtained for that optimum rotor is found to be 0.221 at the highest performance twist angle of 45 o . Furthermore, the proposed rotor model introduces a positive torque coefficient during the entire rotation cycle, with reduced cyclic torque.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Investigation of Two Vertical-Axis Twisted Rotor Models

Sakr

Abdelsalam

Yousef

et al. 2022

ERJ. Engineering Research Journal

View full text Add to dashboard Cite

show abstract

“…Different attempts were made to investigate ways to enhance the power generated by Savonius rotor and consequently improve its performance. This was achieved either by adjusting turbine blade configurations such as twisting rotor blade and/or modifying blade profiles [3][4][5][6][7][8][9][10][11][12], by incorporating fixed shielding plates or deflectors [13][14][15][16][17][18][19][20] in the upstream side of the turbine rotor, by providing wind boosters or curtains to maximize wind strength around the entrance of the wind turbine [21][22][23][24], or by altering the number of rotor blades, blade layers and/or the number of stages (multistacking) [1,[25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Study of a Modified Savonius Rotor Blade by Universal Consideration of Blade Shape Factor Concept

Mahrous

2021

ARFMTS

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This work aims to investigate computationally the performance of Savonius vertical axis wind turbine having a new design feature for its blade geometry. The proposed design is based on a universal consideration of blade shape factor concept for the Savonius rotor blade. A blade shape factor ranges from zero to infinity, or vice versa, is considered in a single blade of the modified Savonius rotor. This means that each point in the two-dimensional blade profile of the suggested blade design has a single value of blade shape factor that is defined based on the dimensions of conventional semi-circular blade. The computational results of the proposed blade shape design, having blade shape factor varying from infinity to zero, showed an improvement in turbine performance as compared to conventional blade shape design. Moreover, increasing the operating range of Savonius wind turbine is expected.

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“…Much research has been carried out so far in order to improve VAWT performance and to maximize the energy generation from the available wind power. In the case of Savonius type VAWT, this was done by considering alternate turbine designs such as twisting and/or modifying profiles of rotor blades [2][3][4][5][6][7], adding a fixed shielding plates, wind boosters or curtains (or ducts) around the entry of wind turbine to enhance wind power [8][9][10] as well as by increasing the number of rotor blades [11][12] or number of stages (i.e. multi step rotors) [13][14].…”

Section: Introductionmentioning

confidence: 99%

A Computational Fluid Dynamics Study of an Integrating Savonius-Darrieus Vertical Axis Wind Turbine

Mahrous

2020

ARFMTS

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To combine the advantages of performance of both Savonius and Darrieus wind turbines, this paper aims to study computationally a novel design configuration of a Vertical Axis Wind Turbine (VAWT). The new design would help cover a broad range of performance parameters between both types of wind turbines as well as overcome drawbacks of the Savonius type at higher rotational speed. The proposed design is to integrate both of Savonius and straight blade Darrieus wind turbines in a single VAWT design configuration. In this design, the turbine rotor consists of a number of similar NACA0015 airfoil blades set in a particular arrangement. By regulating individual angles of rotor blades, the turbine would work as either Savonius or H-Darrieus VAWT. The turbine could also be set to work at different configurations between those for the Savonius and H-Darrieus ones. The computational results revealed that the performance of the proposed integrating wind turbine would be controlled and optimized to cover the operating range of both of Savonius and Darrieus wind turbines. Besides, the performance of Savonius VAWT would be modified when applying this design. When the proposed design is practically implemented, characteristics of both of Savonius and H-Darrieus based wind turbines would be found in a single design.

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Investigating the performance of a twisted modified Savonius rotor

Cited by 42 publications

References 23 publications

Performance Investigation of Two Vertical-Axis Twisted Rotor Models

Performance Investigation of Two Vertical-Axis Twisted Rotor Models

Computational Fluid Dynamics Study of a Modified Savonius Rotor Blade by Universal Consideration of Blade Shape Factor Concept

A Computational Fluid Dynamics Study of an Integrating Savonius-Darrieus Vertical Axis Wind Turbine

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