Aerodynamic And Flight Mechanics Characteristics Of A New Type Of Aircraft Demonstrator

The UAV(Unmanned Aerial Vehicle) is playing a larger and larger role in military and civilianfields, especially the UAV which can transfer lift. It has gradually become a hot research direction ofdomestic and international aviation engineers. The aircraft can be either vertical take-off, landing,hovering or complete the task in the higher flight speed if the lift can be transfered. The topics of thisthesis is based on the background of this kind of unmanned aerial vehicle. The research is supportedby a cooperation project. Aerodynamic performance and flight mechanical performance of a newconfiguration of small unmanned aerial vehicle (The dish-shaped ring coaxial rotor aircraft wing)were studied. The main work of the paper is as follows:(1) In this paper, Firstly,aerodynamic of disk and ring wing combination and the whole aircraft ofthe dish ring wing aircraft were calculated by CFD、AVL and CFD++method.Secondly, wind tunneltests method were used to get the aerodynamic of the whole aircraft. The variation of the aerodynamicforces and moments with respect to angle of attack and speed were obtained by summing up the resultof calculation and test.(2) In this paper, the calculation procedures of flight performance was writed with dish wing andthe ring-wing aerodynamic formula summarized above. The flight performance of hover and forwardflight were calculated in two ways. Through comparative analysis of performance data can guide thedesign and optimization of the overall parameters.(3)The flight mechanics model of the aircraft demonstrator was established with the aerodynamiccharacteristics summaried above.The trim calculations was made of the demonstrator, the handlingand stability characteristics were calculated and analyzed.