雾化器结构对超声雾化供给DMFC的性能影响研究  

Effect of atomizer structure on performance of ultrasonic atomization feed DMFC

作　　者：吴超群[1] 叶智 周奇 黄文健 曹诗宇 WU Chaoqun;YE Zhi;ZHOU Qi;HUANG Wenjian;CAO Shiyu(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《电源技术》2021年第7期841-843,876,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(51775394,51975445)。

摘　　要：建立了超声雾化供给DMFC雾化腔结构的几何模型,利用FLUENT软件分析了雾化腔高度、雾化片开孔范围对喷雾运动特性的影响。为了进一步研究喷雾运动特性对电池性能的影响,搭建了电池性能测试平台。仿真结果表明:通过调整雾化腔的高度和雾化片的开孔范围可以控制雾滴供给速率,进而影响燃料在阳极流场的分布。实验结果与仿真结果一致,当甲醇浓度一定时,改变雾化腔高度和雾化片开孔范围可以在一定程度上缓解甲醇渗透,提高电池的性能。A geometric model of atomization cavity for ultrasonic atomization feed DMFC was established,and the effect of atomization cavity height and the perforation range of atomization sheet on the motion characteristics of spray was analyzed by FLUENT.In order to study the influence of spray motion characteristics on cell performance,the cell performance test system was built.The simulation results show that by adjusting the height of the atomization cavity and the perforation range of atomization sheet,the droplet supply rate can be controlled,which in turn affects the distribution of the fuel in anode flow field.The experimental results are consistent with the simulation results,when the methanol concentration is constant,changing the height of atomizing cavity and the perforation range of atomization sheet can alleviate methanol crossover and improve cell performance.

关 键 词：超声雾化 直接甲醇燃料电池 运动特性 仿真分析 开路电压 

分 类 号：TM911.4[电气工程—电力电子与电力传动]