Aerodynamic Analysis of a Low-Speed Tandem-Channel Wing for eVTOL Aircraft Considering Propeller–Wing Interaction

Min Chang (), Zhongyuan Zheng, Xiaoxuan Meng, Junqiang Bai and Bo Wang
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Min Chang: Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China
Zhongyuan Zheng: Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China
Xiaoxuan Meng: School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Junqiang Bai: Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China
Bo Wang: UAV Laboratory, Institute of Engineering Thermophysics (IET), Chinese Academy of Sciences, Beijing 100190, China

Energies, 2022, vol. 15, issue 22, 1-21

Abstract: Fixed-wing aircraft with vertical takeoff and landing capabilities need a lower speed and a higher lift during transition. To meet these needs, a tandem-channel wing layout has been developed, including a FLR (front wing lower than rear wing) configuration and a FUR (front wing upper than rear wing) configuration, which differ in height differences between the front and rear wings. Numerical simulations have been performed to investigate the aerodynamic characteristics of the two configurations. The results show that a significant increase in lift coefficient occurs when the propeller rotational speed and the angle of attack increase. The lift at a small angle of attack increases by more than 50% at a high propeller rotational speed, and the stall angle of attack increases by more than 10 degrees. For the FLR configuration, the downwash effect of the front wing impacts the rear wing, decreasing the local angle of attack and delaying airflow separation on the top surface. For the FUR configuration, the up surface of the rear wing is induced by the wake flow of the front wing propeller at a high propeller rotational speed, which increases the lift and the stall angle of attack but makes the aircraft have static instability.

Keywords: channel wing; tandem-channel wing; propeller–wing interaction; eVTOL (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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