简介:The distortion, drag and break-up of drizzle droplets subjected to strong aerodynamic
forces was investigated to understand the pre-impact behaviour of droplets in aircraft
icing from supercooled freezing drizzle. The 简介:The distortion, drag and break-up of drizzle droplets subjected to strong aerodynamic
forces was investigated to understand the pre-impact behaviour of droplets in aircraft
icing from supercooled freezing drizzle. The objective was to obtain a formulation and
data for the drag properties of droplets distorted by the aerodynamic forces, which were
beyond the scope of available experimental and modelling methods.
A practical and efficient semi-empirical computer model was developed for small water
droplets in air, 100μm < D < 500μm, at moderate Reynolds numbers, 350 < Re < 1500,
and high Weber numbers 3 < We < 20. This used available experimental terminal velocity
data for free-falling droplets, extrapolated to higher Weber numbers, and the numerical
solution for sessile droplets on a horizontal unwettable surface, with corrections for
the Reynolds number.详细>