DMFC阳极流道内气泡聚合过程的动力学分析  

Kinetics analysis of bubble coalescence in anode channel of DMFC

作　　者：陈海伦 孟庆然 田爱华[1] CHEN Hai-lun;MENG Qing-ran;TIAN Ai-hua(College of Mechanical and Electrical Engineering,Jilin Institute of Chemical Technology,Jilin Jilin 132022,China)

机构地区：[1]吉林化工学院机电工程学院

出　　处：《电源技术》2020年第1期59-61,79,共4页Chinese Journal of Power Sources

摘　　要：基于两相流理论,建立了水平直流道液相进料的直接甲醇燃料电池二维两相等温模型。研究了气泡大小、气泡间距、液相进口速度等因素对流道内CO2气泡聚合的影响,测量了在气泡聚合的整个过程中气泡的高度及位置,得到一些重要时刻气泡的形状,实现了对气泡聚合动态过程的捕捉。模拟分析表明,气泡高度及液相进口速度会影响气泡所受到的剪切力,从而影响气泡运动速度,气泡的聚合过程将加快气泡运动速度,有助于气体排出流道。A two-dimensional two-phase isothermal model of direct methanol fuel cell with liquid phase feeding in a horizontal and straight channel was established based on the two-phase flow theory.The effect of bubble size,bubble spacing,liquid inlet velocity and other factors on CO2 bubble coalescence in the flow channel was studied.The height and position of the bubble during the whole process of bubble coalescence were measured.The simulation analysis shows that the height of bubble and velocity of liquid phase inlet can affect the shear force on the bubble,thus affect the velocity of the bubbles discharge.

关 键 词：气泡聚合 气泡动力学分析 剪切力 

分 类 号：TM911.4[电气工程—电力电子与电力传动]