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http://dx.doi.org/10.5139/JKSAS.2018.46.3.197

Numerical Analysis on Aerodynamic Performances and Characteristics of Quad Tilt Rotor during Forward Flight  

Lee, Seonggi (Department of Aerospace Engineering, Pusan National University)
Oh, Sejong (Department of Aerospace Engineering, Pusan National University)
Choi, Seongwook (Korea Aerospace Research Institute)
Lee, Yunggyo (Korea Aerospace Research Institute)
Park, Donghun (Department of Aerospace Engineering, Pusan National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.46, no.3, 2018 , pp. 197-209 More about this Journal
Abstract
In this study, numerical analyses on Quad Tilt Rotor(QTR) are carried out to investigate the interference effect of components and effect of operating condition during forward flight. Actuator Surface Method(ASM) which is implemented in an open source CFD code, OpenFOAM, is used to calculate the flow field around QTR with high computational efficiency. The lift of the front and rear wing is found to increase or decrease depending on the rotation direction of the rotor. At the rear wing, the interference effects of the front and rear rotor appear as a combined manner. Performance change due to the phase difference is found to be insignificant. For both rotors, the locally higher thrust is generated by the blockage effect of the wing. The interference effect of wake from the front nacelle contributes to higher local thrust for the rear rotor compared to the front rotor. And it is observed that the amplitude of thrust oscillation can decrease depending on the phase difference between the rotors. Aerodynamic performances of both rotors and the entire aircraft were compared and analyzed for various operating conditions.
Keywords
Quad Tilt Rotor; VTOL; Actuator Surface Method; OpenFOAM;
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