Entropy generation analysis of S825, S822, and SD7062 offshore wind turbine airfoil geometries

Mamouri, Amir Reza; Khoshnevis, Abdolamir Bak; Lakzian, Esmail

doi:10.1016/j.oceaneng.2018.12.068

Cited by 29 publications

(4 citation statements)

References 34 publications

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“…Additionally, the FSI mechanism of the deformable hydrofoil is discussed. Given the hydrofoil's significance in TCE devices, the hydrodynamic performance of the pitching hydrofoil can indicate energy-harvesting performance to some extent [38,39]. This study contributes technical support and theoretical insights for the blade design of TCE devices.…”

Section: Of 21mentioning

confidence: 80%

Numerical Study on Hydrodynamic Performance of a Pitching Hydrofoil with Chordwise and Spanwise Deformation

Qu,

Li,

Dong

2024

JMSE

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The hydrofoil plays a crucial role in tidal current energy (TCE) devices, such as horizontal-axis turbines (HATs), vertical-axis turbines (VATs), and oscillating hydrofoils. This study delves into the numerical investigation of passive chordwise and spanwise deformations and the hydrodynamic performance of a deformable hydrofoil. Three-dimensional (3D) coupled fluid–structure interaction (FSI) simulations were conducted using the ANSYS Workbench platform, integrating computational fluid dynamics (CFD) and finite element analysis (FEA). The simulation involved a deformable hydrofoil undergoing pitching motion with varying elastic moduli. The study scrutinizes the impact of elastic modulus on hydrofoil deformation, pressure distribution, flow structure, and hydrodynamic performance. Coefficients of lift, drag, torque, as well as their hysteresis areas and intensities, were defined to assess the hydrodynamic performance. The analysis of the correlation between pressure distribution and deformation elucidates the FSI mechanism. Additionally, the study investigated the 3D effects based on the flow structure around the hydrofoil. Discrepancies in pressure distribution along the spanwise direction result from these 3D effects. Consequently, different chordwise deformations of cross-sections along the spanwise direction were observed, contributing to spanwise deformation. The pressure difference between upper and lower surfaces diminished with increasing deformation. Peak values and fluctuations of lift, drag, and torque decreased. This study provides insights for selecting an appropriate elastic modulus for hydrofoils used in TCE devices.

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Section: Of 21mentioning

confidence: 80%

Numerical Study on Hydrodynamic Performance of a Pitching Hydrofoil with Chordwise and Spanwise Deformation

Qu,

Li,

Dong

2024

JMSE

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“…Mamouri et al [ 8 ] focused on dynamic stall in offshore wind turbine blades and used the entropy generation rate as a tool for analysis and design, showing that some airfoils have a lower drag coefficient. In another work, Mamouri et al [ 9 ] examined the entropy generation of three offshore wind turbine airfoils at various angles of attack, revealing that flow separation has a large impact on the viscous entropy generation rate and that the SD7062 airfoil has the lowest entropy generation rate at large angles of attack. Mamouri et al [ 10 ] examined the aerodynamic coefficients of an oscillating wind turbine airfoil by conducting experiments and focusing on the effective parameters that affect the lift and drag coefficients in the blades, showing that a more suitable airfoil could be chosen based on the wind turbine’s rotation frequency.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Experimental Investigation of 3D Printed Micro Wind Turbine Blade Made of PLA Material

Arivalagan¹,

Rajakumar

Čep

et al. 2023

Materials

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This paper presents the design, development, and optimization of a 3D printed micro horizontal axis wind turbine blade made of PLA material. The objective of the study was to produce 100 watts of power for low-wind-speed applications. The design process involved the selection of SD7080 airfoil and the determination of the material properties of PLA and ABS. A structural analysis of the blade was carried out using ANSYS software under different wind speeds, and Taguchi’s L16 orthogonal array was used for the experiments. The deformation and equivalent stress of the PLA material were identified, and the infill percentage and wind speed velocity were optimized using the moth-flame optimization (MFO) algorithm. The results demonstrate that PLA material has better structural characteristics compared to ABS material. The optimized parameters were used to fabricate the turbine blades using the fusion deposition modeling (FDM) technique, and they were tested in a wind tunnel.

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“…Another approach is the creation of mechanical improvements based on living organisms [10,11], previous works study wind turbine blade shapes inspired by living organisms for the purpose of noise reduction and performance analysis [12]. In this work we analyze the behavior of an airfoil blade used in high velocity turbines such as the S822 [13][14][15], with vortex generators devices inspired by the peregrine falcon [16][17][18], previous studies highlight that this bird has flight stabilizer feathers on its back.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Bio-Inspired Vortex Generators on a Blade with S822 Airfoil

Parra,

Ceron,

Gomez

et al. 2023

Energies

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Vortex generators are used in aircraft wings and wind turbine blades. These devices allow them to maintain a stable turbulent behavior in the wind wake. Vortex generators, or VGs, improve the transition from laminar to turbulent boundary layer regime, avoiding abrupt shedding. HAWT wind turbines have high rotational velocity. Currently, HAWT turbines are being redesigned with fixed vortex generators, achieving higher energy production. This paper presents a wind tunnel analysis of a fixed-wire blade with S822 airfoil and active VGs bio-inspired by the flight-stabilizing feathers of the peregrine falcon. Vibrations measured on the blade show a reduction in intensity at wind velocities close to 15 m/s. The measured wake velocities show fluctuations at higher tunnel wind velocities. An FFT spectral analysis of the wind wake velocities showed differences between the spectral components. When activating the VGs in oscillation at a constant frequency, a reduction of the vibrations on the blade was observed for wind velocities around 20 m/s.

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Entropy generation analysis of S825, S822, and SD7062 offshore wind turbine airfoil geometries

Cited by 29 publications

References 34 publications

Numerical Study on Hydrodynamic Performance of a Pitching Hydrofoil with Chordwise and Spanwise Deformation

Numerical Study on Hydrodynamic Performance of a Pitching Hydrofoil with Chordwise and Spanwise Deformation

Optimization and Experimental Investigation of 3D Printed Micro Wind Turbine Blade Made of PLA Material

Experimental Analysis of Bio-Inspired Vortex Generators on a Blade with S822 Airfoil

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