The effect of various wedge flap configurations on the performance of wind turbine airfoil

Asmail A. M. Abdalkarem and Ahmad Fazlizan and Wan Khairul Muzammil Abd Rahim and Chin Haw Lim and Adnan Ibrahim and Kok Hoe Wong and Hussein A. Kazem (2024) The effect of various wedge flap configurations on the performance of wind turbine airfoil. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering. pp. 1-20.

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Abstract

Controlling turbulent fow to improve wind turbine airfoils' aerodynamic characteristics is a desirable task. The current study evaluated the potential of adding a wedge fap (WF) at the trailing edge of the NACA0021 airfoil. The efect of diferent WF heights and lengths on optimum height (L/H) on the aerodynamic performance and fow over the airfoil has been studied numerically using two-dimensional computational fuid dynamics simulation. The simulation solves the Reynolds-AveragedNavier–Stokes with shear stress transport k–ω turbulent model. The results indicate that adding WF can efectively suppress fow separation and improve aerodynamic efciency in all studied cases compared to clean airfoil. The aerodynamic performance is infuenced signifcantly by the height of WF compared to the slight infuence by the length at L/H<1. Inclined WF achieves the highest lift and lift-to-drag values with total maximum increments of 71.67% and 45.79%, respectively, at optimum height and length with 6%c and 1%c, respectively, in comparison with the clean airfoil case. The results observed that WFs have advantages over the Gurney faps discussed in this study. WF appears to be an efective passive fow control device that can be used in wind turbines if its dimensions are properly chosen.

Item Type:	Article
Keyword:	CFD · NACA0021 · Wind turbine · Wedge fap · Passive fow control
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1-1570 Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ1-1570 Mechanical engineering and machinery > TJ807-830 Renewable energy sources
Department:	FACULTY > Faculty of Engineering
Depositing User:	ABDULLAH BIN SABUDIN -
Date Deposited:	15 Jul 2025 12:25
Last Modified:	15 Jul 2025 12:25
URI:	https://eprints.ums.edu.my/id/eprint/44433

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