首页|Hovering rotor aerodynamics in extreme ground effect

Hovering rotor aerodynamics in extreme ground effect

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This paper presents an experimental and numerical study of the aerodynamics of a moderate-scale rotor hovering in the Extreme Ground Effect(EGE)where rotor height-off-ground is below half the rotor radius.The tip vortex field was visualized by using the PIV technique.The aerodynamic performance,tip vortex trajectory,wall jet characteristics,surface pressure and velocity fields were measured and analyzed.To explore more deeply the flow mechanisms of the extreme ground effect,Detached Eddy Simulation(DES)was conducted on completely structured meshes.The results showed significant deviations of the rotor performance in EGE from that in Regular Ground Effect(RGE)with the rotor heights of more than half the rotor radius.Moreover,the flow structures of the rotor in EGE are considerably complex,such as the wall jet and ground-wash flow separation.The rotor wake flow and tip vortices impact the ground more frequently,resulting in distinctive characteristics of the surface pressure and velocity fields in EGE.

RotorGround effectTip vortexDetached Eddy Simulation(DES)Groundwash

Zhenlong WU、Tianyu ZHANG、Huijun TAN、Haoyu ZHOU、Wei CHEN、Maixiang XIE

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College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

China Aviation Power Machinery Research Institute,Zhuzhou 412002,China

National Science and Technology Major Project,ChinaNational Natural Science Foundation of ChinaCivil Airplane Technology Development Program,China

HT-J2019-V-0004-009512172174MJ-2020-F-10

2024

10.1016/j.cja.2024.02.020

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(7)