単一水滴の着氷過程における残留応力発達挙動

抄録

The phenomenon of water droplets impacting and solidifying on a low-temperature solid surface is called icing, and it is a major problem in various aspects of our daily lives, resulting in reduced aerodynamic performance of aircraft and increased load on power lines. In this research, as a model experiment of the icing process, a single water droplet was dropped onto a substrate and solidified. The strain generated in the substrate was measured during the process, and the effects of substrate temperature on the generation of strain and cracking were investigated. A coupled thermo-structural analysis using the finite element method was also performed to calculate the stresses in the ice film to examine drive force of the cracking. The results showed that the stress in the ice film increases rapidly due to the temperature change of the ice film, and causes the cracking at a certain temperature.