某飞翼布局隐身飞行器的翼型优化

Airfoil Optimization of a Stealth Flying Wind Aerial Vehicle

对某飞翼布局无人机的翼型进行考虑隐身迎角的气动、隐身综合优化研究。采用基于非均匀有理B样条曲线的自由变形方法实现翼型的参数化表达;无限插值动网格方法生成气动求解的计算网格;分别采用基于雷诺平均N-S方程求解的计算流体力学方法及物理光学法计算翼型的气动、隐身性能;选择多目标遗传算法进行综合寻优设计研究。优化翼型兼顾了气动与隐身的要求,其综合性能优于原翼型。结果表明,方法具有较好的实用性。

The aerodynamic and stealth integrated optimization of the foil of a flying wind UAV is investi- gated considering the stealth attack angle. Free Form Deformation based on NURBS curves is used to par- ametric airfoils, an infinite interpolation dynamic mesh method is employed for CFD mesh creation, CFD calculation based on RANS equations is used to analyze the airfoils＇ aerodynamic performance, Physical Optical method is used to calculate RCS,Multi-Objective Genetic Algorithm （MOGA） is adopted for in- tegrated design. The results of airfoils＇aerodynamic and stealth integrated optimization exhibit considerable improvement, it shows that the essay has good practicability.