直升机旋翼结冰后的飞行品质  

Effects of Rotor Icing on Flying Qualities of Helicopter

作　　者：李国知[1] 曹义华[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《南京航空航天大学学报》2011年第3期381-386,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：北京航空航天大学博士研究生创新基金(YWF-10-02-380)资助项目

摘　　要：研究了旋翼结冰后直升机飞行品质分析模型的建立方法,该方法通过引入结冰参数,计算结冰后桨叶翼型升阻力系数增量,建立旋翼结冰模型。并以系数增量形式计入结冰对旋翼力、力矩和旋翼挥舞模型的影响,建立结冰后飞行动力学模型。基于线性小扰动理论,进一步建立结冰后直升机飞行品质分析模型。根据军用旋翼飞行器驾驶品质要求(ADS-33E-PRF),研究了旋翼结冰对直升机开环状态下飞行品质的影响。按照品质规范要求,主要分析了结冰时间、环境温度、液态水含量和平均水滴直径的变化对直升机姿态敏捷性、轴间耦合特性、垂直轴操纵功效和横向突风扰动的影响。计算结果的对比分析显示,直升机旋翼结冰后的飞行品质模型合理,可以用来进行工程应用上的定性分析。A method for establishing the helicopter flying qualities analysis model due to rotor icing is studied.By introducing several icing parameters,the increment of blade airfoil lift/drag coefficient due to rotor icing is calculated,and the rotor icing model is established.Then considering the rotor icing effects on rotor force and torque and rotor flapping model with the forms of coefficient increment,the iced flight dynamic model is developed.Based on the linear perturbation theory,the helicopter flying quality analysis model is established.Based on the handing quality requirements for military helicopters（ADS-33E-PRF）,the effects of icing on the open-loop flying qualities of helicopter are analyzed.According to those requirements,the attitude quickness,interaxis coupling,vertical axis control power,and disturbance of the lateral gust are mainly analyzed with the variation of icing time,atmospheric temperature,liquid water content,and median volumetric diameter.Calculation results indicate that the flying qualities analysis model due to rotor icing is effective,and they can be used as an engineering qualitative analysis tool.

关 键 词：直升机 旋翼结冰 飞行动力学 飞行品质 

分 类 号：V212.4[航空宇航科学与技术—航空宇航推进理论与工程]