摘要
直升机的飞行性能很大程度上取决于它的旋翼性能,桨尖形状对旋翼的性能有着重大影响。为了进一步提高旋翼的性能,基于4m直径的无轴承模型旋翼,采用矩形桨尖、抛物线后掠桨尖、抛物线后掠+下反桨尖、尖削后掠+下反桨尖4种桨尖,通过悬停试验和风洞试验的方法,研究对比了这4副旋翼的悬停效率与前飞升阻比。结果表明,尖削后掠+下反桨尖旋翼在悬停效率和升阻比方面均优于其他桨尖旋翼,其次为抛物线后掠桨尖旋翼。因此,在旋翼性能方面最优的桨尖形状为尖削后掠+下反桨尖。
The flight performance of helicopter depends on rotor performance so much, while blade tip shape plays an important role in the part of rotor performance. In order to further improve rotor performance, a hovering test and a wind tunnel experiment were carried out. In the experiment, four different blade tips rotor were installed on a 4m bearingless scaled-model hub. The four different blade tips were rectangle tip, parabola adding sweep tip, parabola adding sweep and anhedral tip, and taper adding anhedral tip. Rotor aerodynamic performance was measured at hovering and advance-ratio conditions. The rotor hovering efficiency and lift-drag ratio were compared among the four rotors. The comparative result indicated that the taper adding anhedral tip rotor was the best in rotor hovering efficiency and lift-drag ratio, the next was parabola adding sweep tip rotor. Thus taper adding anhedral tip is more helpful in improving rotor performance.
作者
高乐
胡和平
周云
Gao Le;Hu Heping;Zhou Yun(Science and Technology on Rotorcraft Aeromechanics Laboratory, China Helicopter Research and Development Institute, Jingdezhen 333001, China)
出处
《航空科学技术》
2018年第1期74-78,共5页
Aeronautical Science & Technology
关键词
直升机
桨尖选型
尖削
下反
无轴承
helicopter
tip selection
taper
anhedral
bearingless
