摘要
以飞机进气道为参照系,利用动量定理推导了外物在飞机进气道内运动的速度方程;以叶片为参照系,建立了外物撞击速度及撞击角度的表达式。为直观显示不同因素对速度变化的影响,以某型飞机及其发动机为例,研究了飞机离地时,发动机100%设计转速下,外物在飞机进气道内运动速度的变化规律。结果表明:影响运动速度的因素不仅包括外物的材质、形状、大小及姿态,而且涉及飞机进气道长度、发动机工作状态等;外物撞击方向与叶片表面不垂直。
Taking the inlet port for a reference system,the velocity equation was developed using the momentum theorem to describe the motion of the foreign object from the inlet port to the rotor blade of aero-engine.Correlations between impacting velocity and impacting direction were founded by taking the rotor blade as a reference system.A kind of airplane and its aero-engine were taken as example,the change rule of the motion velocity in inlet channel was studied at aero-engine 100% design speed when airplane took off the ground.It was found that the foreign object motion velocity related not only with the foreign object shape,dimension,location and material,but also with the aero-engine working state and the length of the inlet port.The impacting direction was non-vertical to the blade surface.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2017年第12期2842-2847,共6页
Journal of Aerospace Power
基金
国家自然科学基金(51575524)
陕西省自然科学基金(2015JM5240)
关键词
航空发动机
转子叶片
参照系
撞击速度
外物损伤
aero-engine
rotor blade
reference system
impact velocity
foreign object damage
