Asmail A. M. Abdalkarem, Ahmad Fazlizan, Wan Khairul Muzammil, Chin Haw Lim, Adnan Ibrahim, Kok Hoe Wong, Hussein A. Kazem
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The Effect of Various Wedge Flap Configurations on the Performance of Wind Turbine Airfoil
Controlling turbulent flow to improve wind turbine airfoils' aerodynamic characteristics is a desirable task. The current study evaluated the potential of adding a wedge flap (WF) at the trailing edge of the NACA0021 airfoil. The effect of different WF heights and lengths on optimum height (L/H) on the aerodynamic performance and flow over the airfoil has been studied numerically using two-dimensional computational fluid dynamics simulation. The simulation solves the Reynolds-Averaged-Navier–Stokes with shear stress transport k–ω turbulent model. The results indicate that adding WF can effectively suppress flow separation and improve aerodynamic efficiency in all studied cases compared to clean airfoil. The aerodynamic performance is influenced significantly by the height of WF compared to the slight influence 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 flaps discussed in this study. WF appears to be an effective passive flow control device that can be used in wind turbines if its dimensions are properly chosen.
期刊介绍：
Transactions of Mechanical Engineering is to foster the growth of scientific research in all branches of mechanical engineering and its related grounds and to provide a medium by means of which the fruits of these researches may be brought to the attentionof the world’s scientific communities. The journal has the focus on the frontier topics in the theoretical, mathematical, numerical, experimental and scientific developments in mechanical engineering as well
as applications of established techniques to new domains in various mechanical engineering disciplines such as: Solid Mechanics, Kinematics, Dynamics Vibration and Control, Fluids Mechanics, Thermodynamics and Heat Transfer, Energy and Environment, Computational Mechanics, Bio Micro and Nano Mechanics and Design and Materials Engineering & Manufacturing.
The editors will welcome papers from all professors and researchers from universities, research centers,
organizations, companies and industries from all over the world in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.
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