翼型气动特性对高原环境旋翼气动性能影响研究  

Research on the influence of airfoil aerodynamic characteristics on rotor performance in plateau environment

作　　者：柴春硕 袁明川[1] 樊枫[1] CHAI Chunshuo;YUAN Mingchuan;FAN Feng(China Helicopter Research and Development Institute,Jingdezhen 333001,China)

机构地区：[1]中国直升机设计研究所,江西景德镇333001

出　　处：《飞行力学》2022年第1期19-25,共7页Flight Dynamics

摘　　要：以HARTⅡ模型旋翼为研究对象,开展了高原环境下翼型气动特性对旋翼气动性能影响的研究。首先,基于CAMRADⅡ综合分析软件,采用自由尾迹模型建立适合于HARTⅡ旋翼的气动计算模型,并采用相关试验数据进行了计算验证。在此基础上,针对悬停和前飞状态开展了计算研究,分析了不同飞行速度和海拔高度下剖面翼型气动环境对直升机旋翼性能的影响规律。计算结果表明,高原环境悬停效率受翼型本身阻力特性的影响在大拉力系数下下降更快;高原环境旋翼升阻比曲线受剖面翼型工作迎角和马赫数的影响在平原环境升阻比曲线之下;高海拔大前进比时,桨叶尖端区域剖面翼型前行侧的来流马赫数超出阻力发散马赫数,受空气压缩性影响,旋翼性能降低。Based on the HART Ⅱ rotor, the influence of airfoil aerodynamic characteristics on rotor performance in plateau environment is studied. In this paper, a free-wake model was developed to predict the HART Ⅱ rotor aerodynamics calculation model using the rotorcraft comprehensive analysis CAMRAD Ⅱ, and the verification against a set of experiments in related literatures was presented. On this basis, a calculation study was carried out for the hovering and forward flight states, and the influence of the section airfoil aerodynamic environment on the performance of the helicopter rotor at different flight speeds and altitudes was analyzed. The results show that hover efficiency in plateau decreases more quickly under large thrust coefficient, which is affected by the drag characteristic of the airfoil itself. The rotor lift drag ratio in plateau is lower than sea level environment, which is affected by the angle of attack and Mach number of the section airfoil. At high altitude and high advance ratio, the inflow Mach number near the blade tip of section airfoil exceeds the drag divergence Mach number, and affected by the compressibility of air, the rotor performance is reduced.

关 键 词：HARTⅡ旋翼 高原环境 翼型特性 旋翼性能 自由尾迹 

分 类 号：V211.52[航空宇航科学与技术—航空宇航推进理论与工程]