Temperature measurement of super-cooled droplet in icing phenomenon by means of dual-luminescent imaging

摘要

A collision of a supercooled-water droplet on an object creates ice accretion on the surface.The icing problem in any cold environments leads to severe damages on aircrafts, for example, and various studies on prevention and prediction techniques for the icing have been conducted.Therefore, it is very important to know the detail freezing mechanism of supercooled-water droplets to propose and improve those techn iques.The icing mechanism of a single supercooled-water droplet impacting on an object surface would give us great insights for the purpose.In the present study, we use a dual-luminescent imaging technique to measure the time-resolved temperatures of a supercooled-water droplet impacting on the surface under the different temperature condition.We use this tecnology to measure the exact water droplets temperature and to discuss the freezing process indetail.