Numerical Analyses and Flight Tests Verification for the Aerodynamic Characteristics of the Tilting Grille UAV

摘要

In this paper, according to the special layout of the tilting grille UAV, the aerodynamic characteristics of the UAV(unmanned aerial vehicle) was analyzed by CFD(computational fluid dynamics) method, and the result was validated through flight test. In CFD method, coordinate transformation and vector superposition were used to obtain the total aerodynamic force and moment characteristics, this method can substantially reduce the demand of computing resource. Based on the CFD result, the grille can reduce propeller actual pulling force, and the aerodynamic force and moment changed much. The flight test shows that the result of CFD can predict the flow characteristics and aerodynamic characteristics of the UAV during transition mode, and it can ensure the modeling precision for UAV flight control law design reference.