南京航空航天大学学报（英文版）2025，Vol.42Issue(2)：201-211,11.DOI:10.16356/j.1005-1120.2025.02.005
过冷大水滴动力学行为及粒径分布形式对积冰过程的影响研究
Effects of Dynamics Behavior and Size Distribution of Supercooled Large Droplets on Ice Accretion Processes
摘要
Abstract
Accurate simulation of ice accretion of supercooled large droplet(SLD)is pivotal for the international airworthiness certification of large aircraft.Its complex dynamics behavior and broad particle size distributions pose significant challenges to reliable CFD predictions.A numerical model of multi-particle SLD coupling breaking,bouncing and splashing behaviors is established to explore the relationship between dynamics behavior and particle size.The results show that the peak value of droplet collection efficiency β decreases due to splashing.The bounce phenomenon will make the impact limit Sm of the water drops decrease.With the increase of the SLD particle size,the water drop bounce point gradually moves toward the trailing edge of the wing.The critical breaking diameter of SLD at an airflow velocity of 50 m/s is approximately 100 μm.When the SLD particle size increases,the height of the water droplet shelter zone on the upper edge of the wing gradually decreases,and the velocity in the Y direction decreases first and then increases in the opposite direction,increasing the probability of SLD hitting the wing again.Large particle droplets have a higher effect on the impact limit Sm than smaller droplets.Therefore,in the numerical simulation of the SLD operating conditions,it is very important to ensure the proportion of large particle size water droplets.关键词
过冷大水滴/飞溅弹跳/破碎效应/临界直径/粒径分布Key words
supercooled large droplet(SLD)/splash and bounce/break up effect/critical diameter/particle size distribution引用本文复制引用
张德新,曾腾辉,王柳,孙博,程梓康,冯佳昕,谢军龙,陈建业..过冷大水滴动力学行为及粒径分布形式对积冰过程的影响研究[J].南京航空航天大学学报（英文版）,2025,42(2):201-211,11.基金项目
This work was supported in part by the National Natural Science Foundation of China(No.52276009). （No.52276009）
