Aerodynamic Interference Analysis Of Tilt Quad-rotors Aircraft

In order to improve the flight stability of the tilt rotor aircraft,if the tension is provided by using four pairs of rotors,and the four rotors are distributed around the center of gravity of the aircraft,its flight stability will be improved.At present,there are two types of "quadrilateral" and "engineering" configurations for tilting four-rotor aircrafts.The aerodynamic interference of tilting four-rotor aircrafts is similar to that of tilting rotorcrafts,but the "ten" configuration aircraft is Differently,due to the relatively large aerodynamic disturbances of the front rotor/fuselage/rear rotor and the rotor/wing during the flight of the “Ten” configuration tilting quadrotor,in order to further improve the flight stability of the tilt rotor,It is necessary to study it.In this paper,the aerodynamic interference between the front rotor/fuselage/rear rotor and the rotor/airfoil in the case of the vertical flight state,tilt transition state and forward flight state of the “Ten” configuration tilting quadrotor is studied and analyzed..Including,a set of numerical calculation methods including three-dimensional geometric modeling,mesh division,determination of boundary conditions,and turbulence model were established.An example was established by this method and compared with experiments.The quadrotor quadrotor is calculated in the vertical flight state,tilt transition state and forward flight.The aerodynamic forces and aerodynamic moments of the rotor/airfoil are calculated;the calculation results are summarized and analyzed.The occurrence of aerodynamic interference is explained.It can be seen that the fuselage,wing,and rear rotor in the forward flight state are subject to relatively large disturbances.The research methods and research results established in this paper can provide help to design for the late tilting four-rotor aircraft.