混合动力多旋翼无人飞行器设计与气动特性研究

Design and Aerodynamic Characteristics Research on the Multi-Rotor UAV with Hybrid Dynamical System

根据多旋翼无人飞行器油电混合动力系统的特点,为油电混合动力系统提出一种多旋翼无人飞行器,对提出的多旋翼无人飞行器进行结构设计,并利用FLUENT软件对所设计的多旋翼无人飞行器结构布局进行气动计算和分析。计算结果显示所设计的油电混合动力多旋翼无人飞行器结构之间存在气动干扰,随着气桨转速增大,气动干扰增强,总装产生总气动拉力会比气桨单独工作时产生的拉力要小,过高的螺旋桨转速会严重降低总体的气动拉力,因此螺旋桨转速必须加以限制。

According to the characteristics of hybrid dynamical system on multi-rotor unmanned aerial vehicle, a multi-rotorunmanned aerial vehicle is put forward for the hybrid dynamical system. Structural design for the multi-rotor unmanned aerialvehicle is conducted, and the structural layout of the designed multi-rotor unmanned aerial vehicle is calculated and analyzedby using the FLUENT software. The results show that there is aerodynamic interference between the new designed structured ofmulti-rotor unmanned aerial vehicle with hybrid dynamical system, and the aerodynamic interference becomes stronger with increase of the air propeller speed, thus the total pneumatic tension is less than the tension caused by the air propeller alone.There is severe reduction of the total pneumatic tension when the center propeller speed is too high, so the rotate speed of cen-ter propeller must be limited.