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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Print: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v43.i1.30
pages 28-38

Numerical Study of the Effect of Geometrical Changes on the Airfoil Aerodynamic Performance

Reza Kamyab Matin
School of Mechanical Engineering, Iran University of Science and Technology Narmak, Tehran, Iran
Hojat Ghassemi
School of Mechanical Engineering, Iran University of Science and Technology Narmak, Tehran, Iran
Mohammad Hossein Arzideh
Department of Aerospace Engineering, Amirkabir University of Technology

ABSTRACT

In this article, numerical and two dimensional study flow field around NACA0012 airfoil with making geometrical changes is discussed. In order to investigate geometrical changes on airfoil and its effect on aerodynamic performance of the airfoil, design of making step on airfoil have studied. For this purpose, once step at upper surface and once simultaneously at both sides upper and lower surfaces of the airfoil, have considered. The calculations were performed at Reynolds number of 160000 and lift and drag coefficients and lift to drag ratio at stepped airfoils with unmodified NACA0012 airfoil is compared. Also streamlines and separation of flow around airfoils and stall angle have discussed. Results indicate significant changes in airfoil aerodynamic performance as with making step at upper surface airfoil stall angle is delayed and lift to drag ratio is increased at some angles of attack. Also with making step at both sides upper and lower surfaces of the airfoil, lift coefficient increased compare to airfoil without step, especially at low angles of attack.