电源技术2018，Vol.42Issue(2)：226-229,293,5.
μDMFC流场板润湿特性对气液输运的影响
Effect of μDMFC flow field plate wetting properties on gas-liquid transportation
摘要
Abstract
Miniaturization of μDMFC flow channel increases the flow resistance of fluid in the channel.It is easy to make CO2 bubbles block channel.It not only affects the transporting of methanol solution,but also hinders the mass transfer of methanol to the catalyst layer,and decreases electrochemical reaction efficiency.Therefore,it is necessary to improve the transporting properties of gas-liquid in tμDMFC anode channel.The effects of double flow field plate trench sidewall surface wetting properties on gas-liquid two-phase distribution were studied based on the VOF method,and gas-liquid two-phase flow of μDMFC anode channel was simulated by using CFD software FLUENT.It is shown that gas-liquid two-phase in single flow field plate channel renders segmented flow phenomena,and gas-liquid two-phase in double flow field plate channel presents stratified flow phenomena;containing gas rate in double flow field plate is lower than that in the single layer flow field plate channel and pressure drop characteristics of the former is better than the latter.At the same time,the upper layer of the two-layer flow field plate trench sidewalls is hydrophobic,and the lower is hydrophilic,not only good for gas and liquid transportation,but also conducive to the methanol mass transfer.It provides a kind of effective method to enhance the performance of μDMFC.关键词
阳极流场/润湿特性/μDMFC/气液输运/数值模拟Key words
anode flow field/wetting properties/μDMFC/gas-liquid transportation/numerical simulation分类
信息技术与安全科学引用本文复制引用
李苗苗,时均浩..μDMFC流场板润湿特性对气液输运的影响[J].电源技术,2018,42(2):226-229,293,5.基金项目
江苏省自然科学基金青年基金项目(BK20130804) （BK20130804）
国家自然科学基金青年基金项目(51505215) （51505215）
南京航空航天大学研究生创新基地(实验室)开放基金资助项目(kfjj20160513) （实验室）
