سال انتشار: ۱۳۸۵
محل انتشار: چهاردهمین کنفرانس سالانه مهندسی مکانیک
تعداد صفحات: ۸
Ahmad Ghorbany – PhD student, Academy Member, Shahin Shahr, Malek Ashtar Technology of University, Engine Research Center, Aerospace Department
Airfoil design is very important for cruise missile performance, stability and control. Many optimization algorithms have been applied to airfoil shape design, but the use of local optimization tools like Gradient-Based methods may risk missing the best designs. The objective of this paper is to explore issues for global optimization of missile airfoil shapes in the transonic flow region by comparing a genetic algorithm with Gradient-Based optimization method. To determine the local optimum characteristics of the airfoil shape design space, different airfoil shapes are used as base or starting airfoils. The results showed that the GA generated nearly the same shape regardless of the different initial base airfoils, which suggests that these shapes are approaching the global optimum. Comparisons of the generated airfoil shapes, the airfoil shapes performance, and the computational effort expended as a result of the GA and GB methods are presented.