民航飞机深失速的机理分析

Mechanism Analysis of Civil Aircraft's Deep-stall

本文通过建立失速后的飞机平尾力矩系数表达式，提出平尾重要参数变差角，分析脱体涡卷对平尾的作用效果，所得出的飞机ｍｚ～α曲线与实验曲线基本一致，从而阐明了民航飞机深失速的机理以及预防和消除的途径。

Through establishing the expression of the horizontal tail's pitching moment coefficient stall, this paper presents an important parameter, the difference angle T (T =θT-αT) of the horizontal tail and analyses the effect of the action of trapped vortex on the horiaontal tail. The result of this research shows that the aircraft's curve of Mz ～α corresponds basically to the experimental curve, thus explaining the aircraft deep-stall mechanism and the ways of its prevention and elimination.