Aerodynamic performances of complex shape wings

• Main Author: О.О. Кім
• Format: Article
• Language: English
• Published: National Aviation University 2005-04-01
• Series: Vìsnik Nacìonalʹnogo Avìacìjnogo Unìversitetu
• Online Access: http://jrnl.nau.edu.ua/index.php/visnik/article/view/1248

<p><em> The task of calculation of optimum circulation distribution along wingspan of complex shape wings is considered. For solving this problem Glauert-Trefts’s equation and its modifications are used. Calculations are carried out for both sweptback and forward-swept wings. It is shown that optimum circulation distribution depends on the sweep angle χ and  on the chord b(z) distribution along wingspan. Some aerodynamic coefficients such as induced drag coefficient C_Di and pitching moment coefficient C_mZ are calculated for wings of different shape. The comparison of wings </em><br /><em>performances is done. In order to obtain the minimum wing induced drag with the given lift force it is very important to determine how the circulation should change along the wingspan. Results obtained by E. K. Karafoli G.F. Burago and others are used. A set of theoretical generalizations and modifications of formulas for aerodynamic coefficients are </em><br /><em>obtained. These results permit to compare aerodynamic performances of sweptback and forward-swept wings. Modified Glauert-Trefts’s integral-differential equation is formulated for wings of complex shape.</em></p>