Effect of Gap between Airfoil and Embedded Rotating Cylinder on the Airfoil Aerodynamic Performance

Abdulla, Najdat Nashat

doi:10.31031/rdms.2018.03.000567

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The embedment was set up along the camber line of the aerofoil while maintaining a gap of 0.005 m between the cylinder and the aerofoil. The gap was set to optimum configuration performance for the model's embedment (Abdulla & Hasan, 2018). The embedment of the cylinder at 3/20 of the camber line was utilized to optimize its diameter to fit the aerofoil's leading edge and trailing edge, and thus satisfied with the experimental data by Michael S. Selig and James Gugliemo (Selig & Guglielmo, 1997).…”

Section: Geometry and Computational Modellingmentioning

confidence: 99%

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Comparative Computational Study of Double Rotating Cylinder Embedded on Selig S1223 Aerofoil and Flat Plate for High Altitude Platform

Ali¹,

Rafie²,

Hamid³

et al. 2022

JST

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The high-altitude platform was built as an alternative approach to address the weakness of the terrestrial and satellite communication networks. It can be an aircraft or balloon positioned 20 to 50 km above the earth’s atmosphere. The use of the Magnus effect was not noticeable in the production of the high-altitude platform, while past research study has denoted its aerodynamic performance in generating greater lift and stall angle delay, which would be beneficial in creating such a flying device. This research delineates the proposed designs using the computational fluid dynamics approach utilizing ANSYS WORKBENCH 2019 software. The embedment of the rotating cylinder onto the design would best portray the use of the Magnus effect in generating higher lift coefficients with probable delay in stall angle. Hereby, the design of embedding rotating cylinder onto Selig S1223 aerofoil and the flat plate is proposed to test their aerodynamic performances for high altitude platform purposes. Here, Fluent fluid flow analysis was simulated for 500 RPM and 1000 RPM momentum injection with free stream velocities from 5 m/s to 30 m/s for different angles of attack of 0 to 20 degrees. The analysis has resulted in a greater impact on its lift coefficient and stall angle delay of about 39% and 53% enhancement for modified aerofoil while showing 128% and 204% betterment for modified flat plate than their respective unmodified model. Therefore, it is perceived that the CyFlaP has better stability yet is simplistic in a design suitable for HAP application.

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Section: Geometry and Computational Modellingmentioning

confidence: 99%

“…Mesh Independency Test. In order to monitor the solution grid independence before commencing with the model testing phase, a mesh independency test (MIT) was recommended (Abdulla & Hasan, 2018). It was obtained by establishing a new cell grid and testing it utilizing various alternatives.…”

Section: Grid Generationmentioning

confidence: 99%

Comparative Computational Study of Double Rotating Cylinder Embedded on Selig S1223 Aerofoil and Flat Plate for High Altitude Platform

Ali¹,

Rafie²,

Hamid³

et al. 2022

JST

View full text Add to dashboard Cite

show abstract

“…Additionally, the gap between the rotating cylinder and the airfoil is a key parameter affecting aerodynamic performance. Abdulla et al [29] determined, through numerical simulations at rotation ratios of 1, 2, and 3, that maintaining a gap of 3 mm resulted in the maximum lift-to-drag ratio. Najdat [30] analyzed the effects of different rotation speed ratios, angles of attack, and gaps on the aerodynamic performance of trailing-edge rotating cylinders through numerical and experimental methods.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Energy Harvesting Efficiency of Flapping Wings with Leading-Edge Magnus Effect Cylinder

Zhang,

Zhu,

Chen

2024

Biomimetics

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According to the Magnus principle, a rotating cylinder experiences a lateral force perpendicular to the incoming flow direction. This phenomenon can be harnessed to boost the lift of an airfoil by positioning a rotating cylinder at the leading edge. In this study, we simulate flapping-wing motion using the sliding mesh technique in a heaving coordinate system to investigate the energy harvesting capabilities of Magnus effect flapping wings (MEFWs) featuring a leading-edge rotating cylinder. Through analysis of the flow field vortex structure and pressure distribution, we explore how control parameters such as gap width, rotational speed ratio, and phase difference of the leading-edge rotating cylinder impact the energy harvesting characteristics of the flapping wing. The results demonstrate that MEFWs effectively mitigate the formation of leading-edge vortices during wing motion. Consequently, this enhances both lift generation and energy harvesting capability. MEFWs with smaller gap widths are less prone to induce the detachment of leading-edge vortices during motion, ensuring a higher peak lift force and an increase in the energy harvesting efficiency. Moreover, higher rotational speed ratios and phase differences, synchronized with wing motion, can prevent leading-edge vortex generation during wing motion. All three control parameters contribute to enhancing the energy harvesting capability of MEFWs within a certain range. At the examined Reynolds number, the optimal parameter values are determined to be a∗ = 0.0005, R = 3, and ϕ0 = 0°.

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Effect of Gap between Airfoil and Embedded Rotating Cylinder on the Airfoil Aerodynamic Performance

Cited by 2 publications

References 4 publications

Comparative Computational Study of Double Rotating Cylinder Embedded on Selig S1223 Aerofoil and Flat Plate for High Altitude Platform

Comparative Computational Study of Double Rotating Cylinder Embedded on Selig S1223 Aerofoil and Flat Plate for High Altitude Platform

Enhancing Energy Harvesting Efficiency of Flapping Wings with Leading-Edge Magnus Effect Cylinder

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