摘要
为分析螺旋桨滑流对无人机气动特性的影响,利用数值模拟方法,对比了有无螺旋桨滑流作用下无人机气流的变化规律。结果表明:螺旋桨滑流对无人机机身的干扰影响主要集中在中后段;机身近表面变化的速度和压力梯度会导致机身整体的气动力发生变化;螺旋桨滑流增大了升力,降低了整个构型的最大升阻比,但最大升阻比所对应的迎角几乎没有发生变化。
In order to analyze the reason of UAV aerodynamic characteristics change caused by propeller slipstream,the air flow variation of UAV with propeller slipstream flow are compared with those without propeller slipstream flow with the numerical simulation method. It is found that the main influence of propeller slipstream is focused on the middle and tail of fuselage. The variation of velocity and pressure gradient near the fuselage can change UAV aerodynamic force. For overall airplane,propeller slipstream increases the lift force and reduces the lift-drag ratio. But the attack of angle corresponding to the maximum lift-drag ratio almost has no any change.
出处
《飞行力学》
CSCD
北大核心
2018年第1期24-28,共5页
Flight Dynamics
基金
国家自然科学基金资助(51066006
51266013)
航空科学基金资助(2013ZB56004)
关键词
螺旋桨
滑流
气动特性
propeller
slipstream
aerodynamic characteristics
