Improving performance of H-Type NACA 0021 Darrieus rotor using leading-edge stationary/rotating microcylinders: Numerical studies

El‐Askary, W. A.; Burlando, Massimiliano; Mohamed, Mohamed H.; Eltayesh, Abdelgalil

doi:10.1016/j.enconman.2023.117398

Cited by 6 publications

(2 citation statements)

References 46 publications

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“…However, in urban areas with high-rise buildings, changing wind directions and strong turbulence make traditional large horizontal axis wind turbines (HAWTs) extremely disadvantageous. Moreover, the high cost of land resources in urban areas limits the installation of wind turbines [2,3]. However, VAWTs are suitable for small-scale power generation in urban environments due to their unique features [4,5].…”

Section: Introductionmentioning

confidence: 99%

Optimization Layout and Aerodynamic Performance Research on Double Nautilus Vertical-Axis Wind Turbine

Xia,

Cao,

Qian

et al. 2023

Applied Sciences

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The double vertical-axis wind turbine (VAWT) system serves as a high-performance design solution. The Nautilus wind turbine investigated in this research imitated the structure of a Nautilus shell and is a vertical-axis drag-type wind turbine that exhibits relatively low efficiency. Therefore, the improvement of its wind energy efficiency is of paramount importance. This paper utilizes Computational Fluid Dynamics (CFD) software, based on the Reynolds-averaged Navier–Stokes equations and dynamic meshing techniques, to conduct numerical investigations on the aerodynamic performance of the Nautilus wind turbine array layout. The effects of wind direction, spacing ratio, and rotation direction are individually studied, and the interpretations and explanations are provided based on flow field characteristics. The results show that when the wind direction is 90°, i.e., a transverse layout, the closer the spacing between the transverse turbines, the higher the average power coefficient of the entire wind turbine system, with little effect from the three rotation directions. The maximum average power coefficient reached 28.9% and the power gain factor (TPGF) reached 11.1%. The enhancement effect primarily originates from the wake interaction among neighboring turbines. The experimental results showed a deviation of 8.1% compared to the CFD simulation results, thus validating the accuracy of the numerical CFD modeling. Ultimately, several array layouts are proposed, based on the prevalent wind direction and spacing ratio research. The enhancement of the wind turbine array’s situation could significantly increase the average efficiency of the entire wind turbine cluster. Consequently, this study provides a reference for the practical application of biomimetic vertical-axis drag-type wind turbine systems in actual engineering.

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Section: Introductionmentioning

confidence: 99%

Optimization Layout and Aerodynamic Performance Research on Double Nautilus Vertical-Axis Wind Turbine

Xia,

Cao,

Qian

et al. 2023

Applied Sciences

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“…The use of a micro-riblet film allows controlling airflow around a NACA 0012 airfoil [3]. The aerodynamic performance of H-Type NACA 0021 Darrieus rotor could be improved using leading-edge stationary/rotating microcylinders [4]. Blowing and suction jets applied on a wind turbine airfoil improve its aerodynamic performances [5].…”

Section: Introductionmentioning

confidence: 99%

Drag Reduction of a NACA Aerodynamic Airfoil: A Numerical Study

Agriss,

Agouzoul,

Ettaouil

2023

JFFHMT

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The primary goal of this research is to introduce a novel method for reducing drag of the NACA 0012 airfoil, aiming to enhance its aerodynamic performance. This involves strategically placing a specialized device in areas where flow separation occurs. The primary purpose is to decrease drag of the airfoil, ultimately leading to improved efficiency. To thoroughly explore this approach, extensive two-dimensional numerical simulations have been carried out, employing the computational fluid dynamics (CFD) capabilities of Ansys Fluent 17.0. The analysis is based on conditions of incompressible and laminar airflow, with particular focus on a Reynolds number of Re = 1000 and a 5° angle of attack. The resultant outcomes highlight instances in which the device effectively reduces drag while simultaneously enhancing the lift-to-drag ratio. Looking ahead, future research works include a more comprehensive investigation of this innovative drag reduction device across a wider range of angles of attack, thereby expanding its potential applications.

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Enhancing aerodynamic performance of vertical axis wind turbines using bionic airfoils inspired by swordfish tail

Song,

Ye,

Wang

et al. 2024

Meccanica

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Improving performance of H-Type NACA 0021 Darrieus rotor using leading-edge stationary/rotating microcylinders: Numerical studies

Cited by 6 publications

References 46 publications

Optimization Layout and Aerodynamic Performance Research on Double Nautilus Vertical-Axis Wind Turbine

Optimization Layout and Aerodynamic Performance Research on Double Nautilus Vertical-Axis Wind Turbine

Drag Reduction of a NACA Aerodynamic Airfoil: A Numerical Study

Enhancing aerodynamic performance of vertical axis wind turbines using bionic airfoils inspired by swordfish tail

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