单液滴撞击球形表面的涂覆效果  

Coating and the Impact of Single Droplet on the Spherical Surface

作　　者：徐庆[1] 李占勇[1] 王瑞芳[1] 朱曙光[1] 

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《天津科技大学学报》2013年第1期50-54,共5页Journal of Tianjin University of Science & Technology

基　　金：国家高技术研究发展计划(863计划)项目(2012AA021303)

摘　　要：液滴与球形表面的碰撞为喷雾包衣等工程应用的基础.以单液滴与球形光滑表面为研究对象,采用高速相机,分析了在液滴不同撞击速度(0.88～4.43 m/s)和不同直径的球面(5～15mm)实验条件下涂覆率的变化.研究了液滴与球面发生碰撞时发生的铺展震荡、涂覆球面、破碎飞溅现象.最后,建立了K值、球面直径与碰撞现象之间的关系图,为理论分析和数值模拟提供依据.Droplet-spherical surface collision is a fundamental issue in the application of spray coating. Under the experi- mental conditions of different impact velocity（0.88-4.43 m/s）and different outer diameters of the spherical surface（5- 15 mm）, the impact of a single droplet on a spherical surface at room temperature was investigated by analyzing the changes of coating with the help of a high-speed camera. When contacting the spherical surface, the droplet spreads, retracts, relaxes or splashes on the surface. Consequently, the relationship between the K value, sphere diameter and impacting phenomena was established for theoretic analysis and numerical simulation.

关 键 词：单液滴 撞击速度 球形表面 涂覆 

分 类 号：TQ051[化学工程]