Aerodynamic Investigation of a Damaged Airfoil with Wall E ects

Authors

1 Department of Mechanical Engineering,Sharif University of Technology

2 Department of Aerospace Engineering,Amirkabir University of Technology

Abstract

Aerodynamic behavior of an airfoil with circle, right and inverse triangle shaped damage
was numerically investigated. The
ow through the damage was driven by the pressure differential between
the upper and lower wing surfaces. For all damage shapes, the results showed that the
ow could be
categorized as weak or strong jets. The jet exited the rear of the damage; its size was determined by
the width of the rear part of the hole and was dependent on the shape of the damage. Generally, when
compared with an undamaged model, increasing the angle of attack for a damaged model resulted in
increased loss of lift coefficient, increased drag coecient and more negative pitching moment coefficient.
This effect was more severe for the right triangle case. Furthermore, the numerical results were compared
with experimental data to study the effect of a wall on the
ow field.

Keywords

Scientia Iranica
Volume 17, Issue 5 - Serial Number 5
Transactions on Mechanical Engineering (B)
October 2010

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