Basic Aerodynamic of Straight Wings

Abstract

The purpose of this article is to briefly review the basic aerodynamic of straight wing which is the basic pattern of the most low speed aircraft in the present day. The straight wing has the basic aerodynamic principle nearly the same as the airfoil. However, the flow field over the straight wing is three-dimensional pattern which differ from the two-dimensional flow field of airfoil. Therefore, the wing aerodynamic parameters such as lift coefficient and drag coefficient differ from the airfoil too. The shape parameters that effect the wing aerodynamic characteristics are wing platform, wing section profile, taper ratio and aspect ratio. These parameters are used to calculate value of wing aerodynamic parameters. Moreover, some parameters such as wing platform also effect flow separation pattern when wing is in stall condition. Therefore, the knowledge and understanding of the basic aerodynamic of straight wing is very important in aircraft design.