飞机机翼气动外形优化设计研究

本文首先对某飞机原机翼外形进行了详尽的气动分析计算，然后确定了设计思路和方案，探讨了后掠角变化对机翼气动性能的影响，研究选定了减小外翼后掠角的机翼新平面形状，采用先进的CFD软件优化机翼的气动设计，根据不同设计思想进行了多个机翼的外形优化，包括新的翼剖面和弯扭配置，最后将优化设计结果与原机翼进行了对比，对比结果表明，以Q5-M2T和Q5-N2T为代表的优化结果取得了十分理想的改进效果，优化机翼提高了气动性能，机翼升阻比提高了20%-30%，满足了飞机载弹量增大后性能仍可以全面提高的设计要求。

The Research of Optimal Aerodynamic Layout for Aircraft Wing

In this paper, the detailed analysis and calculation for original wing of an aircraft are presented, and the design scheme is determined. The effect of the aerodynamic characteristics with sweep back angle is discussed, and a new planeform of the wing which can decrease sweep back angle is determined. The aerodynamic design of the wing is optimized by FCD program. In accordance with the different design idea, many optimized wings are obtained, including wing section, camber and torsion design. Finally, the optimal design results are compared with original wing. The calculating results show that the optimal design results of Q5-M2T and Q5-N2T wings are perfect, and the flight performance can be improved when the aircraft has many external stores. The optimal wing improves aerodynamic characteristics and the lift-drag rate of wing increases 20% - 30% .