雷暴低空风切变中大雨对飞行的影响

分析了雷暴低空风切变中大雨滴冲击飞机的机身和机翼而引起的水平和垂直动量损失，估算了大雨累计在机身和机翼上的水膜厚度，并讨论了因遇到大雨雨滴冲撞而粗糙化的机体所产生的阻力。结果表明：雷暴低空风切变中大雨雨滴的冲击作用是明显的，被粗糙化的机体所产生的阻力能显著改变飞行轨迹，并能影响飞行安全；累计在机身和机翼上的水膜厚度造成的飞机质量的增加对飞行的影响可以忽略。

Effect of Heavy Rain on Flight in the Low-Level Wind Shear of Thunderstorm

The horizontal and vertical momentum loss caused by the shock of heavy rain in low-level wind shear of thunderstorms on the airframe and wing are analyzed, the water film thickness on the airframe and wings estimated, and the flight resistance resulted from raindrops-striking caused by the roughness of airplane when the heavy rain shocks the airplane is discussed. Study shows that the effect of the shock of heavy rain on an airplane in the low-level wind shear of thunderstorms is evident, the flight resistance resuited from the roughness of airplane is able to change the flight track and endanger the flight safety, whereas, the increase in the mass of airplane caused by the water film on the airframe and its wings in heavy rain is nigligible.