液滴撞击固体表面过程的实验研究  

Experimental study of droplets impacting on a solid surface

作　　者：陈烽 王登飞[2] 蔡子琦[1] 高正明[1] 刘新卫[3] CHEN Feng;WANG DengFei;CAI ZiQi;GAO ZhengMing;LIU XinWei(College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029;Daqing Chemical Research Center, Petrochemical Research Institute, China National Petroleum Corporation, Daqing 163714;College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国石油天然气股份有限公司石油化工研究院大庆化工研究中心,大庆163714 [3]北京化工大学机电工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2019年第4期14-23,共10页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(21676007);中国石油天然气股份有限公司科学研究与技术开发项目(2016B-2605)

摘　　要：对液滴撞击固体表面的过程进行实验研究,考察液滴的物性和操作条件对撞击过程的影响,结果表明:随着液滴黏度的增加、或表面张力系数的增大、或撞击速度的减小,液滴的铺展直径、铺展速度和铺展面积均减小,液滴的能量在黏性中的耗散主要发生在撞击的初始阶段,随着液滴黏度的增加、或表面张力系数的减小、或撞击速度的增大,黏性耗散的速率均增加。本文得到的关于液滴雷诺数和韦伯数的关联式可用于预测液滴的最大铺展直径和最大铺展面积。An experimental study of droplets impacting on a solid surface had been carried out in order to investigate the influence of the physical properties of the droplets and operating conditions on the impact process.The results show that as the viscosity of the droplet increases,the surface tension coefficient increases,or the impact velocity decreases,the spreading diameter,spreading speed and spreading area of the droplet all decrease.The dissipation of the energy of the droplet mainly occurs in the initial stage of the impact.As the viscosity of the droplet increases,the surface tension coefficient decreases,or the impact velocity increases,the rate of viscous dissipation increases.The correlations with the Reynolds number and the Weber number of the droplets obtained in this work can be used to predict the maximum spreading diameter and the maximum spreading area of the droplet.

关 键 词：液滴 撞击 铺展特性 黏性耗散 

分 类 号：TQ021.1[化学工程]