微通道内流动沸腾气泡生长特性数值研究  

Numerical Investigation on Bubble Growth Characteristics of Flow Boiling in a Microchannel

作　　者：卢伟[1] 杨震[1] 段远源[1] LU Wei;YANG Zhen;DUAN Yuanyuan(Institute of Engineering Thermophysics,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学能源与动力工程系工程热物理研究所,北京100084

出　　处：《工程热物理学报》2023年第6期1612-1616,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51736005,No.51876101)。

摘　　要：利用FLUENT软件,采用VOF多相流模型对水在矩形微通道内流动沸腾过程中气泡的生长进行了数值模拟,分析了壁面热流密度、入口质量通量和接触角对气泡生长速率的影响,并得到了气泡周围的温度和压力分布。结果表明,壁面热流密度和质量通量的增大导致气泡生长速度的增加,而最小的接触角有最大的气泡生长速度,气泡边界上的温度梯度和压力梯度都较大。VOF multiphase fow model was used to simulate the bubble growth of water during flow boiling in rectangular microchannel by using FLUENT.The effects of wall heat flux,inlet mass fux and contact angle on the growth rate of bubble were analyzed,and the temperature and pressure distributions around bubbles were obtained.The results show that the increase of wall heat flux and mass fux leads to the increase of bubble growth rate.Furthermore,the smallest contact angle has the largest bubble growth rate,while the temperature and pressure gradient on the bubble boundary arelarger.

关 键 词：流动沸腾 微通道 气泡生长 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]