摘要
采用数值模拟方法研究鸭式旋翼/机翼(CRW,Canard Rotor/Wing)飞行器在转换过程末段,旋翼转速极低时全机气动特性变化规律及其产生原因.给出了旋翼旋转一周时,全机气动力、气动力矩、焦点位置变化规律,对此布局形式,转换过程末段全机升力、阻力变化幅度可达10.7%,3.7%,焦点可移动0.6m.研究显示:旋翼处于前后不对称流场及旋翼处于不同方位角时对机体的不对称干扰是气动力与气动力矩变化原因,旋翼与平尾升力线斜率变化、旋翼自身焦点位置变化导致了全机焦点移动.
The aerodynamic characteristics and mechanism of canard rotor/wing（CRW） aircraft during conversion from rotary to fixed-wing flight was numerically investigated.The variation of forces,moments and aerodynamic center with respect to rotor position are presented,the amplitude of lift,drag and aerodynamic center for this configuration in conversion can reach 10.7%,3.7% and 0.6 m separately.The investigation shows that the cause of forces and moments variation is the asymmetry flow field in rotary plane and asymmetry interference between rotor and fuselage,the motion of aerodynamic center can be explained by the motion of rotor aerodynamic center and the variation of lift curve slope of rotor and horizontal tail.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2011年第3期311-315,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
武器装备预研重点基金资助项目(9140A25010208HK0101)
关键词
鸭式旋翼/机翼飞行器
气动特性
流场干扰
飞行模式转换
canard rotor/wing（CRW） aircraft
aerodynamic characteristic
flow interference
flight mode conversion
