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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。
The numerical simulation method is used to study the influence of connecting mechanism such as slat slide and flap slide rail to the aerodynamic performance of lifting device and its flow mechanism. The results show that the connection mechanism will slightly reduce the lift coefficient of the linear section of the lifting device and significantly reduce the angle of attack and the maximum lift coefficient. The analysis of the flow mechanism shows that the slat slides will drag out the strong wake flow, and the mixing of these wake flows into the surface of the main wing will reduce the lift coefficient of the lifting device. At high angle of attack, the slat slides will be direct Induces a wide range of flow separation. Flap rail slides will reduce the area of the flap slits, accelerating the flap slit jet and favoring the separation of the surface of the blown flap surface.