سال انتشار: ۱۳۹۱

محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک

تعداد صفحات: ۵

نویسنده(ها):

Ramin Taheri, – Graduate Student, Center of excellence in Aerospace Systems, Sharif University of Technology
Karim Mazaheri – Professor, Center of excellence in Aerospace Systems, Sharif University of Technology

چکیده:

In this article a Genetic algorithm is compared with one of the gradient-based algorithm (Extended Linear Interior Penalty Function Method) in the context of aerodynamic shape optimization of a wing-body configuration for a better lift to drag ratio. Digital Datcom is used for aerodynamic predictions. Here we have chosen sixty five design variables for wing optimization and constant area planform constraint is applied. Solution of the multi-objective optimization problem showed that 10% improvement for lift coefficient in comparison with nearly 30% decrease in drag coefficient is possible. Moreover, five times fast convergence of the gradient-based algorithm respect to the genetic algorithm.