倾转四旋翼UAV过渡状态下旋翼/机身气动干扰数值分析

通过数值模拟的方法对十字构型倾转四旋翼UAV在倾转过渡状态下前旋翼/机身/后旋翼间的气动干扰进行了计算与分析。分别建立了孤立前旋翼、前后旋翼、前旋翼-机身、前后旋翼-机身组合时的计算模型。在不同旋翼倾转角下,研究了以上组合模型对前旋翼、后旋翼以及机身的气动力和力矩的影响并分析了相互间的气动干扰情况,得出了前旋翼是整机气动干扰影响的主导因素,揭示了旋翼/机身间气动干扰形成的原因,为该构型旋翼布置与控制系统的设计提供参考。

Numerical Analysis of Aerodynamic Interference of Rotor/Fuselage in Transition State of Tilting Four-Rotor UAV

Numerical simulation is carried out to calculate and analyze the aerodynamic interaction between the front rotor/fuselage/rear rotor during the tilting and transition state of the cross shaped four-rotor UAV. The calculation models of isolated front rotor, front/rear rotors, front rotor/fuselage, and front/rear rotors fuselage combination are established. Numerical calculation and analysis of aerodynamic force and aerodynamic torque of the front rotor/fuselage/rear rotor at the different angles of rotor tilting are proposed. It is concluded that the front rotor is the leading factor in the aerodynamic interference of the whole UAV in the front rotor/fuselage and front/rear rotor fuselage combination. It provides the theoretical guidance for the design and optimization of the configuration of this kind UAV.