小型共轴无人机CFD气动仿真分析  

CFD Aerodynamic Simulation Analysis of Small Coaxial UAV

作　　者：王胜 刘凤丽[1,2] 郝永平 WANG Sheng;LIU Feng-li;HAO Yong-ping(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China;Liaoning Province Key Laboratory of Advanced Manufacturing Technology and Equipment,Shenyang 110159,China)

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110159 [2]辽宁省先进制造技术与装备重点实验室,辽宁沈阳110159

出　　处：《机械工程与自动化》2024年第1期46-49,53,共5页Mechanical Engineering & Automation

摘　　要：以新款共轴飞行器为研究对象,通过三维数值模拟分析方式寻求最优间距比进而完善飞行器结构,提升飞行器性能。为研究悬停状态下共轴飞行器的桨叶间距对旋翼气动的影响,首先通过叶素-动量理论建立旋翼载荷模型,然后应用非结构运动嵌套网格技术及CFD方法展开新型共轴飞行器旋翼系统在悬停状态下的气动载荷分析;通过改变不同的间距比在Fluent中进行模拟计算,得到不同间距比下旋翼升力与扭矩,并利用CFD-Post后处理得出相应间距下旋翼附近速度流线图。数值分析结果表明:悬停状态下小间距比的旋翼系统气动性能优于大间距比的旋翼系统气动性能;同一转速时,不同间距比下的总扭矩及总载荷不同,间距变化对旋翼系统载荷影响较小。In this paper,a new type of coaxial aircraft is taken as the research object,and the optimal blade spacing ratio is sought through three-dimensional numerical simulation and analysis,so as to improve the aircraft structure and performance.In order to study the effects of blade spacing on rotor aerodynamic dynamics of a coaxial aircraft in hovering state,a rotor load model was established by the blade momentum theory with numerical simulation.The unstructured motion nested mesh technique and CFD method were used to analyze the aerodynamic loads of a new coaxial aircraft rotor system in hovering state.By changing different spacing ratios,the rotor lift and torque at different spacing were obtained through the simulation calculation in Fluent.After CFD-Post processing,the velocity flow diagram near the rotor with corresponding spacing is obtained.Finally,the numerical analysis results show that the aerodynamic performance of the rotor system with small spacing is better than that of the rotor system with large spacing in hover state.At the same speed,the total torque and total load are different at different spacing,and the change of spacing has little effect on the load of the rotor system.

关 键 词：共轴无人机 旋翼气动特性 CFD 间距比 

分 类 号：V279.2[航空宇航科学与技术—飞行器设计] TP391.9[自动化与计算机技术—计算机应用技术]