共轴式双旋翼悬停流场的水洞PIV测量

PIV measurement of water tunnel for the flow field of a hovering coaxial-rotor

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要: 采用粒子图像测速(PIV)技术,对共轴式双旋翼在悬停状态下的流场进行水洞实验,测量得到旋翼流场的涡量和速度分布,桨尖涡的结构和脱落轨迹等直观整体的图像,研究了共轴式双旋翼悬停流场的气动干扰特性.为了比较,对单旋翼也进行测量.实验结果为直升机的气动计算和合理设计提供了可靠的实验依据.
- 航空、航天推进系统 /
- 共轴式直升机 /
- 旋翼流场 /
- 尾迹 /
- 水洞实验 /
- 粒子图像测速(PIV)
Abstract: Particle Image Velocimetry(PIV) technique was applied to water tunnel experiment for the flow field of hovering coaxial-rotor.Vortex contours and velocity distribution of the rotor flow fields,configuration and trajectory of the tip vortex were measured.The aerodynamic interference characteristics of hovering coaxial-rotor flow fields were also investigated.Asingle-rotor was also measured for comparison purpose.The experimental results provide reliable reference for aerodynamic calculation and reasonable design of helicopter.
- aerospace propulsion system /
- coaxial helicopter /
- rotor flow fields /
- wake /
- water tunnel experiment /
- particle image velocimetry(PIV)

[1]	Akimov A I,Butov V P,Bourtsev B N,et al.Flight investigation of coaxial rotor tip vortex structure[R].Washington DC:50th Annual Forum of the American Helicopter Society,1994.
[2]	李洪昌,邓彦敏.共轴式双旋翼尾迹形态及桨尖涡结构的实验研究[D].北京:北京航空航天大学航空科学与工程学院,2004.LI Hongchang,DENG Yanmin.Experimental inves tigation of coaxial rotor wake and tip vortex[D].Beijing:School of Aeronautic Science and Technology,Beijing University of Aeronautics and Astronautics,2004.
[3]	高正.直升机空气动力学的新成果[M].北京:航空工业出版社,1999.GAO Zheng.Recent achievements in the field of helicopter aerodynamics[M].Beijing:Aviation Industry Press,1999.
[4]	Gregorio F D,Ragni A.Wake vortex characterisation in towing tank facilities using PIV technique[R].AIAA-2003-93.