Numerical Simulation of Aerodynamic Characteristics of New Hybrid Unmanned Aerial Vehicles
LE Shu-lin · Jisuanji fangzhen · 2014
In the study of performance optimization of hybrid unmanned aerial vehicle( UAV),the UAV belongs to unconventional and hybrid structure,with the principle that the hybrid power is provided by rotors and buoyancy.The aerodynamic characteristics affect the UAV performances,however,the relative research is very few. For this reason,the numerical simulation method of computational fluid dynamics was used to research the modeling and simulation on the issues of aircraft aerodynamic. On the basis of UAV overall design,a 3D model was built to investigate the resistance characteristics,the pneumatic effect of the airbag on rotors,and the pitching moment characteristics in different states. From the analyzing simulation results,it indicates that the pneumatic effect of the airbag on rotors is slight. The whole flight resistance goes up with the increasing in flight speed,and the maximum flow velocity which UAV can overcome is 5m /s in different angle of incidence.