微下冲气流对飞机着陆性能的影响

Influence of Micro-Downburst on Aircraft Landing Performance

摘要:

针对飞机在下滑着陆阶段穿越微下冲气流的问题,建立了微下冲气流影响下的飞机纵向运动数学模型。用数值方法计算了微下冲气流对空速、迎角和航迹的影响,结果表明,飞机在穿越微下冲气流时,空速、迎角、下滑航迹变化很明显,飞行员操纵和判断的难度会增大。特别是顺风阶段,航迹比正常偏低很多,对飞机的安全着陆影 响很大。

Abstract:

The mathematical model of aircraft motion with the influence of micro-downburst was established in this paper,and the influence of micro-downburst on aircraft landing performance was analyzed using numerical method. The resultsindicated that aircraft landing performance could be obviously influenced by micro-downburst. When the aircraft crossedmicro-downburst, its airspeed, angle of attack and glide track would change obviously, the difficulty of control and esti.mate for pilot would augment. Especially in tail wind, glide track was much lower than normal condition, it would bring det.rimental influence on safety of aircraft landing.