水空两栖太阳能四旋翼气动特性研究

太阳能四旋翼无人机结合了太阳能飞行器和四旋翼飞行器的优点,已受到广泛关注,但由于太阳能板的存在,旋翼的安装高度和轴距会对整机的气动效能产生影响。通过基于粒子法格子玻尔兹曼技术的XFlowCFD软件,对太阳能四旋翼无人机的整机流场进行非定常数值模拟,并分析该飞行器的气动特性。结果表明:旋翼高度对整机升力的影响较小,旋翼的安装轴距越大整机的升力越大,其主要原因是轴距较小时,旋翼产生的下洗流冲击在太阳能板上,对整机产生气动干扰。

Research on Aerodynamic Characteristics of New Solar Four-rotor

Due to the existence of solar panels, the installation height and wheelbase of the rotor have an impact on the aerodynamic performance of the whole machine. The non-constant constant value simulation of the flow field of the whole machine is carried out by XFlow software based on the particle method lattice Boltzmann technique. The simulation results show that the height of the rotor has little effect on the lift of the whole machine. The larger the installation wheelbase of the rotor is, the larger the lift of the whole machine is. The main reason is that when the wheelbase is small, the lower wash flow generated by the rotor impacts on the board. The whole machine produces pneumatic interference. According to the simulation results and the whole machine, the analysis shows that the best installation method of the rotor is half-wheelbase R=859mm and height H=55mm, and provides some reference for the design of similar aircraft in the future.