边条翼作俯仰运动时翼面吹气的作用

Blowing Effects on Strake-Wing Unsteady Aerodynamic Characteristics During Dynamic Pitch

在3m低速风洞中通过测力与微丝显示方法，研究了在边条翼的边条和主翼上吹气对机翼作大攻角快速俯仰运动时空气动力特性的影响，同时还研究了在不同边角下开始吹气的作用。结论表明，翼面吹气能有效提高机翼的非定常气动特性和缩小机翼的非定常气动特性迟滞回环，特别是在小迎角下开始吹气效果较好。

The blowing effects of the dynamic pitch strake-wing on unsteady aerodynamic characteristics studied experimentally in the 2.5m×3m low-speed wind tunnel in NUAA. The unsteady experimental results of with or without blowing and blowing onset in different phases were compared. The flow visualization results were used to explain the mechanism of the unsteady aerodynamic characteristics. It is indicated that blowing along the wing surface can improve the unsteady aerodynamic characteristics of wing and reduce the scale of unsteady aerodynamic hysteresis loops, especially, the blowing effects of onset at the low angle of attack is more obvious than that at the high angle of attack.