面向机翼气动外形优化的二级优化方法

A Two-level Optimization Approach for Aerodynamic Design of Wing Shape

针对飞机气动外形优化问题,提出了一种流程简单,可同时优化总体外形和剖面形状的二级优化方法。这种方法将优化流程分为总体外形级和剖面形状级两个层次:总体外形级优化任务是将外形参数传递给剖面形状级,并对总体外形进行优化;剖面形状级优化任务是对剖面形状进行优化,并将目标函数和约束值返回总体外形级。二级优化的最终结果可获得最优的总体外形和剖面形状。文章以一个通用航空飞机的机翼为算例,验证了这种二级优化方法的可行性和有效性。

This paper proposes a two - level optimization approach for aerodynamic design of aircraft shape. The approach is simple in terms of flowchart and has the ability to conduct both the outline and the section optimization simuhaneously. The approach is divided into two levels including outline optimization and section optimization： the outline optimization passes the outline parameters to the level of section optimization and its objective is to find the optimum outline ; the section optimization is aimed to find the optimum section shape for the given outline parameters and feedbacks the object function and constraints to the level of outline optimization. This two-level approach is able to find out the optimum shape including both the outline and the section shape. The aerodynamic optimization of the wings of a general aviation aircraft was used to verify the approach.