高空长航时太阳能无人机高效气动力设计新挑战  

Challenges of high efficiency aerodynamics design for HALE solar powered UAV

作　　者：段卓毅[1] 王伟[1] 耿建中[1] 张健[1] 李军府[1] 

机构地区：[1]中航工业第一飞机设计研究院,陕西西安710089

出　　处：《空气动力学学报》2017年第2期156-171,共16页Acta Aerodynamica Sinica

摘　　要：高空长航时太阳能无人机具有飞行雷诺数低、结构柔性大等设计特点,在气动力设计时,一般采用单设计点的设计思想,即在预定设计状态下具有较为优异的气动特性,但稍微偏离该设计点时,将显著地削弱其气动力特性,为其高效气动力设计带来诸多新挑战。本文首先简要回顾了太阳能飞机的发展历程,并分析了该类飞机的设计特点;随后,重点介绍了该类飞机的高效低雷诺数气动力设计面临的挑战及机翼气动弹性效应对全机气动力特性的影响;最后,分析展望了缩比自由飞验证技术在该类飞机高效气动力设计中的应用。High Altitude Long Endurance （HALE） solar powerea w^m （UAV） has the design characteristics of low flying Reynolds number and very flexible wing. The single point design concept is usually introduced to the aerodynamics design of such aircraft. By this design concept, a relatively excellent aerodynamic characteristics can be obtained at the preconcert design state. However, these characteristics are usually weakened significantly if the design point has a slightly departure. First, the developed history and the design characteristics of solar powered UAV are reviewed. Second, we introduce the design challenges of high efficiency low Reynolds Number aerodynamics and the effect of static aeroelastics. Finally, the scaled free flying validation technique is prospected in the application of high efficiency aerodynamics design of HALE solar powered UAV.

关 键 词：太阳能无人机 低雷诺数 气动力设计 气动弹性 缩比自由飞 单设计点 

分 类 号：V217.4[航空宇航科学与技术—航空宇航推进理论与工程] V216.7