共轴双旋翼无人机不同桨间距比时的气动分析

Aerodynamic Analysis of Coaxial Twin-rotor UAV with Different Pitch Spacing Ratios

为了优化共轴双旋翼无人机在悬停时的气动性能,提高操纵性能和续航能力,进行共轴双旋翼无人机不同桨间距比时的气动分析。对共轴双旋翼无人机功率载荷和悬停效率进行理论建模与分析,通过仿真试验对不同桨间距比时的功率和升力进行分析,采用滑移网格法,模拟升力、扭矩变化情况,以及流场、压强分布情况。分析结果表明,在固定转速下,桨间距比为0.4时,共轴双旋翼无人机的气动性能最佳。

In order to optimize the aerodynamic performance of coaxial twin-rotor unmanned aerial vehicle in hovering,improve the handling performance and endurance ability,the aerodynamic analysis of coaxial twin-rotor unmanned aerial vehicle with different pitch spacing ratios was conducted.The power load and hovering efficiency of coaxial twin-rotor unmanned aerial vehicle were theoretically modeled and analyzed.The power and lift with different pitch spacing ratios were analyzed through simulation and experiment.The sliding grid method was used to simulate the change of lift and torque,as well as the flow field and pressure distribution.The result shows that the pitch spacing ratio is 0.4 with a fixed speed,the aerodynamic performance of coaxial twin-rotor unmanned aerial vehicle is the best.