环翼机低速气动特性风洞实验研究

环翼机具有前、后翼，前翼后掠，后翼前掠，机翼在翼尖处连接，形成一个环状结构。为了解环翼的气动特性及环翼的几何参数对环翼机气动特性的影响，本文在低速风洞中对3种不同几何参数环翼飞机进行了纵向及横向测力实验，其中包括前、后翼几何参数改变对气动特性的影响。实验结果表明，与常规飞机相比，环翼机具有如下优点：诱导阻力小，失速特性好，操稳性能易于满足。实验得到的有价值结果，对环翼布局飞机的气动计算和合理设计具有重要意义。

The Aerodynamics Research of Ring Wing Configuration in Low Speed Wind Tunnel

Ring wing aircraft has an unconventional configuration,which combines swept-aft front wing and swept-forward rear wing joined at wingtip.The wings form an annulus shape in both planform and in front view.The three ring wing configurations have been experimented in low-speed wind tunnel.The longitudinal and lateral-directional aerodynamic characteristics of ring wing aircraft are discussed.The test results appears that ring wing provides the following advantages over conventional aircraft: lower induced drag...