液滴与壁面撞击流动及传热特性研究  

Movement and Heat Transfer Characteristics of Single Droplet Impacting on the Wall Surface

作　　者：黄龙 刘昭亮[1] 王玉洁[1] Huang Long;Liu Zhaliang;Wang Yujie(Jiangsu Maritime institute,Maritime institute,Nanjing,211112)

机构地区：[1]江苏海事职业技术学院,南京211112

出　　处：《制冷与空调（四川）》2020年第2期283-288,共6页Refrigeration and Air Conditioning

摘　　要：采用Level Set-VOF模拟单液滴撞击壁面的铺展行为及液滴初速度、初始直径及液膜厚度对液滴撞壁传热特性的影响。研究表明:液滴初始速度较大,撞击壁面后发生强烈反弹,液滴在表面回缩破碎及铺展破碎能力加强,导致表面传热系数随之增大;随着液滴初始直径增大,液滴铺展破碎的发生,将对表面传热起促进作用;初始液膜越厚,撞击后液滴溅射能力被削弱且在表面铺展趋势延缓,因此不利于热量迅速传递。In this paper,in order to study the dynamic of liquid droplet impacts on surface the coupled Level Set-VOF is used.The effects of initial velocity,initial diameter and thickness of liquid film on the spreading process of droplet impinging on wall surface are mainly studied.The results show that the droplet with smaller velocity and diameter have smaller kinetic energy and rebounds after impacts on the wall surface.With the increase of droplet diameter and velocity,the the heat transfer coefficient increases.The increase of liquid film accelerates the spread of droplets on the wall,and the spreading factor decreases accordingly.

关 键 词：液滴 撞击行为 Level Set-VOF模拟 传热系数 

分 类 号：V229.5[航空宇航科学与技术—飞行器设计]