江苏大学学报（自然科学版）2018，Vol.39Issue(2)：149-154,6.DOI:10.3969/j.issn.1671-7775.2018.02.005
V形凹槽对微通道流动沸腾临界热流密度的影响
Effects of V groove on critical heat flux of flow boiling in microchannel
摘要
Abstract
According to volume of fluid model and user defined function,the numerical simulation was performed to predict the flow boiling of water in 0.2 mm×20.0 mm microchannel with V grooves.The effects of the ratio of groove depth to width h/R and the groove number n on critical heat flux of flow boiling were analyzed.The results show that under the working conditions with inlet water temperature Tin of 369.00 K,velocity v of 0.2 m·s-1and a certain number of grooves n of 30,the critical heat flux (CHF)in microchannels is different by varying h/R with R of 0.02 mm.Setting h/R with different values of 1,2,3 and 4,the critical heat fluxes are 400,375,500 and 450 kW·m-2,respectively,and the highest CHF is 500 kW·m-2for h/R of 3.When h/R is given as 3,the critical heat flux is increased with the increasing of groove number.While n values are taken as 30,90 and 150,the critical heat fluxes are 500,525,575 kW·m-2,respectively.Under a certain condition,suitable groove structure with h/R of 3 and much more V grooves on heating wall can improve the critical heat flux in microchannel,which is helpful to maintain the reliability of flow boiling heat transfer.关键词
微通道/V形凹槽/流动沸腾/临界热流密度/数值模拟Key words
microchannel/V groove/flow boiling/critical heat flux/numerical simulation分类
能源科技引用本文复制引用
王迎慧,朱静,盛林弘毅..V形凹槽对微通道流动沸腾临界热流密度的影响[J].江苏大学学报（自然科学版）,2018,39(2):149-154,6.基金项目
国家自然科学基金资助项目(51576091) （51576091）
