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Aerodynamics of porous airfoils and wings

Aldheeb, Mohammed Abdulmalek and Asrar, Waqar and Sulaeman, Erwin and Omar, Ashraf Ali (2018) Aerodynamics of porous airfoils and wings. Acta Mechanica, online 1st. pp. 1-19. ISSN 0001-5970 E-ISSN 1619-6937 (In Press)

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Abstract

This paper presents novel wind tunnel test results on the aerodynamics of a symmetric thin porous airfoil and a porous rectangular half wing using a symmetric thin airfoil as its cross section, obtained by a six-component force balance. The variation of lift coefficient, drag coefficient, pitching moment, lift versus drag, the gradient of lift, and location of the aerodynamic center with respect to the angle of attack are presented as a function of the porosity. The data, where possible, are compared with the analytical results. The trend of the experimental results behaves in the same manner as the analytical solution. The measured drag coefficients of the airfoil and wing are also presented. The applicability of the standard equation relating the lift coefficient of a non-porous wing with that of a non-porous airfoil to the case of porous wings is verified by applying the equation to porous wings and validating the results using experimental data. Lift slope decreases as the porosity increases. The drag decreases at a low value of porosity and then increases as porosity increases. The standard equation for obtaining the lift coefficient of a wing from the lift coefficient of an airfoil is applicable and valid for porous wings and airfoils.

Item Type: Article (Journal)
Additional Information: 4277/64676
Uncontrolled Keywords: Porosity · Porous airfoil · Porous wing · Aerodynamics · Permeability
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User: Prof. Waqar Asrar
Date Deposited: 25 Jul 2018 10:25
Last Modified: 27 Feb 2019 12:14
URI: http://irep.iium.edu.my/id/eprint/64676

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