雨滴撞击引起的飞机动量损失分析

Analysis of aircraft momentum loss by strokes of raindrops

近几年来,由于飞机试图在雷暴天气下着陆,发生了若干商用飞机事故。引起事故的主要原因是那些与雷暴单体有关的风切变。事实上飞机除遭遇风切变外,若干飞机还同时陷入大雨单体,由于雨滴撞击和大雨使翼面变粗糙,使飞机遭受动量损失和阻力增大,从而影响了飞机的空气动力性能。通过对雨滴撞击而使飞机遭受的动量损失的分析,作出大雨对飞机空气动力性能影响的评定。

The strokes pf raindrops and the heavy rain make the aircraft surface rough and result in the momentum loss and the drag increase. Hence the air dynamic performance of the aircraft is affected. The influences of the heavy rain on the flight accident from the windshear are evaluated based on the analysis of the aircraft momentum loss by the strokes of raindrops. 