和过冷大液滴(SLD)导致航天器结冰现象相关的强空气动力学作用下小液滴的形变,拖拽及磁支撑的实验和建模研究
The distortion, drag and break-up of drizzle droplets subjected to strong aerodynamicforces was investigated to understand the pre-impact behaviour of droplets in aircrafticing from supercooled freezing drizzle. The objective was to obtain a formulation anddata for the drag properties of droplets distorted by the aerodynamic forces, which werebeyond the scope of available experimental and modelling methods.A practical and efficient semi-empirical computer model was developed for small waterdroplets in air, 100μ m D 500μ m, at moderate Reynolds numbers, 350 Re 1500,and high Weber numbers 3 We 20. This used available experimental terminal velocitydata for free-falling droplets, extrapolated to higher Weber numbers, and the numericalsolution for sessile droplets on a horizontal unwettable surface, with corrections forthe Reynolds number.