优化转速旋翼性能分析与应用  

Performance Investigation and Applications of Optimum Speed Rotors

作　　者：刘士明[1] 杨卫东[1] 董凌华[1] 武庆中[2] 吴裕平[2] 

机构地区：[1]南京航空航天大学旋翼动力学国家级重点实验室,南京210016 [2]中国直升机设计研究所,景德镇333001

出　　处：《南京航空航天大学学报》2014年第6期888-894,共7页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：旋翼转速的变化会对直升机性能产生重要影响,通过建立优化转速旋翼性能分析综合模型,包含PetersHe广义动态入流模型和全机配平模型,以国产现役某轻型直升机为例,分析前飞速度、起飞质量、飞行高度等对变转速旋翼转速优化路径的影响,分析变转速旋翼技术对提高直升机航时等性能的可能性。分析结果表明:通过合理降低旋翼转速,可以使最大起飞质量下的需用功率降低30%;起飞质量越轻、飞行高度越低,旋翼优化转速越低,需用功率降低越明显;通过优化转速完全消耗400kg燃油,通过优化旋翼转速,可使最大续航时间提高20.5%,最大航程提高8.5%;桨叶内段布置厚翼型能提高桨叶刚度,增加大速度时需用功率,但对中低速度飞行时总体性能影响较小,不影响长航时的优点。The performance of helicopters can be significantly influenced by rotor speed variation.A performance analysis model is built to exam the influences of rotating speed,airspeed,take-off weight and flight altitude on the optimal rotating speed of a specific helicopter with a variable speed rotor.The Peters-He generalized dynamic inflow model and full aircraft trim model are introduced.The result shows 30 ％ reduction in main rotor power is observed through rotor rotating speed reduction for the maximum take-off weight.For lower take-off weights or altitudes,the reductions in rotor speed and power savings are more apparent.The optimal rotating speed can cause a 20.5％ increase in endurance and 8.5％ in range by thoroughly consuming 400 kg of fuel.Setting thick airfoil at the inner side of blade can increase blade stiffness,which leads to some increments in required power when speeding up,but has little effect on the performance at middle and low speed,and no effect on endurance.

关 键 词：直升机 优化转速旋翼 变转速 性能 

分 类 号：V212.13[航空宇航科学与技术—航空宇航推进理论与工程]