CFD Aerodynamic Simulation Analysis of Small Coaxial UAV
In this paper,a new type of coaxial aircraft is taken as the research object,and the optimal blade spacing ratio is sought through three-dimensional numerical simulation and analysis,so as to improve the aircraft structure and performance.In order to study the effects of blade spacing on rotor aerodynamic dynamics of a coaxial aircraft in hovering state,a rotor load model was established by the blade momentum theory with numerical simulation.The unstructured motion nested mesh technique and CFD method were used to analyze the aerodynamic loads of a new coaxial aircraft rotor system in hovering state.By changing different spacing ratios,the rotor lift and torque at different spacing were obtained through the simulation calculation in Fluent.After CFD-Post processing,the velocity flow diagram near the rotor with corresponding spacing is obtained.Finally,the numerical analysis results show that the aerodynamic performance of the rotor system with small spacing is better than that of the rotor system with large spacing in hover state.At the same speed,the total torque and total load are different at different spacing,and the change of spacing has little effect on the load of the rotor system.
coaxial UAVrotor aerodynamic characteristicsCFDspacing ratio
万方数据
维普
