摘要
运用数值模拟方法,研究了缝翼滑轨、襟翼滑轨舱等连接机构对于增升装置气动性能的影响及其流动机理。结果表明:连接机构会使增升装置线性段升力系数略微减小,同时会显著减小失速迎角及最大升力系数。流动机理分析表明:缝翼滑轨会拖出较强尾迹流,这些尾迹流混入主翼上表面附面层后会使增升装置升力系数减小,在大迎角下,缝翼滑轨会直接诱发大范围的流动分离。襟翼滑轨舱会减小襟翼缝道的面积,使襟翼缝道射流加速而有利于吹走襟翼表面的物面分离。
By numerical simulation, the influence of slat tracks and flap track fairings on aerodynamic per- formance of high-lift system and its flow mechanism have been investigated. The results indicate that these brackets just bring a little descent to the linear part of lift curve, but cause a remarkable loss to the angle of stall and maximum lift coefficient. The mechanism lies in that low-momentum strong wake flow generated by slat tracks mixed with the boundary layer of main wing, which causes the remarkable loss of the lift. At high angle of attack, slat tracks will generate large area flow separation. The flap slot section area diminishes for blockage effect of flap track fairings. This made the high speed flow of flap slot faster, and made for blowing the separation flow on flap surface away.
出处
《空气动力学学报》
EI
CSCD
北大核心
2012年第6期798-804,共7页
Acta Aerodynamica Sinica
