纵列双桨无人机的气动仿真分析

Aerodynamic Simulation Analysis of Tandem Rotor UAV

为解决纵列双桨无人机的桨叶重叠部分的气动干扰导致的旋翼效率减少问题,基于计算流体力学(CFD)方法对纵列双桨无人机的气动特性进行了仿真分析,包括不同攻角、两桨叶相对位置变化以及整流罩气动外型优化。结果表明:在不同攻角下,无人机的攻角对升力系数的影响大于阻力系数;无人机两桨叶在纵向距离3420 mm、轴向距离540 mm时旋翼的干扰最小,效率最高。之后进行了无人机整流罩优化,得到了更加理想的气动外型。为纵列双桨无人机的气动设计提供了重要的参考和指导,同时也为无人机的发展和应用提供了有益的实践经验。

In order to address the reduced rotor efficiency caused by the aerodynamic interference from the overlapping rotor blades in a tandem coaxial unmanned aerial vehicle(UAV),this study conducted a simulation analysis of the aerodynamic characteristics of the tandem coaxial UAV using computational fluid dynamics(CFD)methods.The analysis included different angles of attack,variations in the relative positions of the two rotor blades,and aerodynamic shape optimization of the fairing.The research results indicate that the angle of attack has a greater influence on the lift coefficient than the drag coefficient at different angles of attack.The interference of the rotor is minimized and the efficiency is maximized when the two rotor blades have a longitudinal distance of 3420 mm and an axial distance of 540 mm.Subsequently,an optimization of the fairing was performed,resulting in a more favorable aerodynamic shape.The findings of this study provide important references and guidance for the aerodynamic design of tandem coaxial UAVs,while also offering valuable practical experience for the development and application of UAVs.