Aerodynamic interaction characteristics of coaxial rigid rotor⁃fuselage in hover condition

被引：0
|
作者：
Sun, Pengpeng [1 ]
Liu, Pingan [1 ]
Fan, Feng [1 ]
Zeng, Wei [1 ]
机构：
[1] Science and Technology on Rotorcraft Aeromechanics Laboratory, Jingdezhen
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2024年 / 45卷 / 09期
关键词：
aerodynamic interaction; coaxial rigid rotor; fuselage; hover; wind tunnel test;
D O I：
10.7527/S1000-6893.2023.29284
中图分类号：
学科分类号：
摘要：
Experimental and computation studies were conducted on the aerodynamic interaction between coaxial rigid rotor-fuselage in hover. The influence of fuselage aerodynamic interference in hover on the aerodynamic characteristics of coaxial rigid rotor and the pressure distribution on the fuselage surface was analyzed. It is found that the range of high lift areas at the tip of the upper and lower rotor blades is increased，and the power coefficient of the rotors is reduced at the same tension coefficient with the aerodynamic interaction of the fuselage. The rotor maximum Figure of Merit（FM）increases by approximately 4. 6%. The fuselage generates vertical down-load，which is about 7% of the rotor pull force，with the influence of rotor downwash flow. Excluding vertical down-load on the fuselage，the maximum FM of the rotor is reduced by about 6% compared to isolated rotors. Under the aerodynamic interaction of rotor，the fuselage generates an upward force moment，which is proportional to the rotor tension coefficient. The surface pressure of the fuselage exhibits an unsteady variation of 4 times the rotational frequency. © 2024 Chinese Society of Astronautics. All rights reserved.
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