摘要
为研究螺旋桨和机翼对双螺旋桨推进构型复合式直升机的飞行性能影响,在已有的直升机飞行性能模型基础上耦合螺旋桨和机翼气动模型,建立了该型复合式直升机配平模型。以X-3构型直升机为样例,通过加装螺旋桨和机翼组成不同的配置,给出了直升机各操纵量和姿态角的变化,并通过控制气动部件为复合式直升机提供推力和升力的不同配比,分析直升机的需用功率和升阻比变化。结果表明:机翼对复合式直升机升阻比的提升较为明显,且能有效减小总距和横向周期变距;前飞速度大于一定速度后,螺旋桨对复合式直升机需用功率的降低和对升阻比的提高才开始显现;同时配置螺旋桨和机翼,并合理分配推力和升力,可有效降低整机的需用功率,进而提升复合式直升机飞行性能。
A compound helicopter trim model with aerodynamic models of propeller and wing based on flight performance model of helicopter was constructed to investigate the effect of propeller and wing on the performance of compound helicopter with twin propellers.Taking the X-3 helicopter as an example,by adding different configurations of propeller and wing,the changes of each control strategy and attitude angle of the helicopter were given,and the effect of the variable proportions of propeller’s thrust and wing’s lift on the helicopter power required and helicopter lift-to-drag coefficient was analysed.Result showed that wing was useful to raise obviously peak lift-to-drag ratio,and also reduce collective and lateral cyclic pitch.The propeller could only improve the peak lift-to-drag ratio and reduce the helicopter power required until the flight speed is up to certain speed.The final compound helicopter configurated with propeller and wing could reliably achieve the less helicopter power required just by reasonably distributing thrust and lift,thereby improving the flight performance of the compound helicopter.
作者
何晓萍
韩东
杨克龙
桑玉委
HE Xiaoping;HAN Dong;YANG Kelong;SANG Yuwei(National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2020年第4期815-822,共8页
Journal of Aerospace Power
基金
国家自然科学基金面上项目(11972181)
旋翼空气动力学重点实验室开放基金(RAL20180201-1)
江苏省高校优势学科建设工程资助项目(PADP)
2019年研究生创新基地(实验室)开放基金立项资助项目(KFJJ20190102).
关键词
飞行性能
复合式直升机
螺旋桨气动模型
机翼气动模型
需用功率
flight performance
compound helicopter
aerodynamic model of propeller
aerodynamic model of wing
power required
