悬停状态旋翼间干扰对四旋翼升力影响分析

四旋翼无人机旋翼间干扰对旋翼升力产生较大影响。建立考虑旋翼直径、弦长、变桨距、转速等因素的适用于四旋翼飞行器的等效盘模型。对该模型添加动量源,在Fluent中计算孤立单旋翼悬停状态下不同转速的旋翼升力,并与实验数据进行对比,验证等效盘模型的有效性。使用上述方法,计算和分析悬停状态时不同旋翼间距下旋翼间的相互干扰对四旋翼升力的影响。结果表明:相同转速下,旋翼间距越小,旋翼间干扰越强烈,升力损失越大。

Analysis of rotor interference effects on quadrotor lift in hover

The aerodynamic interference among rotors has strong affect on the lift force of theqnad rotor UAV. An equivalent actuator disk model of airplane propeller is presented, which takes the factors such as diameter, chord, pitch and rotating speed of rotor, etc, into consideration. The effectiveness of the cquivalem actuator disk is established thorough increasing momentum source. The different lift force of a single rotor in hover on Fluent is calculated and compared with the experimental data. Thorough the above method, the elf eels Of inler ference among rotors on lift force ofquad rotor in hover are calculated in different rotor distances. Resuhs show that the smaller the rotor distance is, the stronger the interference and the more loss of lift force will be.