同轴式微通道内气泡生成特性数值模拟及试验验证  

Numerical Simulation and Experimental Verification of Bubble Formation Characteristics in Coaxial Microchannels

作　　者：王月[1] 徐博 王艳丽 WANG Yue;XU Bo;WANG Yan-li(College of Mechanical Engineering, Beihua University, Jilin, Jilin 132021;School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004;Jilin Institute of Industrial Technicians, Jilin, Jilin 132021)

机构地区：[1]北华大学机械工程学院,吉林吉林132021 [2]燕山大学机械工程学院,秦皇岛河北066000 [3]吉林省工业技师学院,吉林吉林132021

出　　处：《液压与气动》2021年第7期95-100,共6页Chinese Hydraulics & Pneumatics

基　　金：吉林省科技发展计划项目(20200301044RQ);吉林市科技创新发展计划(20190104187)。

摘　　要：粒径在百微米量级的微细气泡相比于常规尺寸气泡具有传质效率高、存留时间长等优势,常用于污水处理、食品清洁等领域。基于二相流理论和水平集方法,利用COMSOL Multiphysics流体仿真软件,通过数值模拟研究同轴式微通道内微细气泡形成的机理及影响因素。搭建了微细气泡生成特性试验系统,探究恒定液体流量下不同气体压力对微细气泡生成频率与体积的影响。对比实际试验值与数值模拟值,结果表明:不同气体压强下,微细气泡生成频率和体积的模拟值与试验值具有良好的相关性。Compared with the conventional size bubbles,the micro bubbles with the particle size of 100μm have the advantages of high mass transfer efficiency and long retention time,which has always been used in the fields such as sewage treatment and food cleaning.Based on the two-phase flow theory and level set method,the COMSOL Multiphysics fluid simulation software is used to research the mechanism and influencing factors of the formation of microbubble in the coaxial microchannel.An experimental system for the generation of microbubble is set up,and the effect of different gas pressures on the frequency and volume of microbubble generation at a fixed liquid flow rate is explored.The actual experimental value is compared with the simulation value,and the results show that the simulation value of the frequency and volume of microbubbles generated under different gas pressures has a good correlation with the experimental value.

关 键 词：二相流 水平集方法 微细气泡 数值模拟 

分 类 号：TH137[机械工程—机械制造及自动化] TH122