化工学报2025，Vol.76Issue(11)：5574-5583,10.DOI:10.11949/0438-1157.20250452
考虑扩散层表面润湿性的流道内两相流对燃料电池性能影响研究
Study on influence of two-phase flow in channels considering surface wettability of gas diffusion layers on fuel cell performance
摘要
Abstract
The two-phase flow within flow channels of proton exchange membrane fuel cells is a critical factor affecting the performance,but the multi-physics coupling research considering detailed two-phase flow characteristics such as the evolution of the gas-liquid interface is still insufficient.By constructing a fuel cell model coupled with the volume of fluid model,this study quantitatively analyzes the impact of the surface wettability of the gas diffusion layer(GDL)on mass transfer and performance in fuel cells.The results show that neglecting the detailed two-phase flow in channels can overestimate both the fuel cell performance and the uniformity of physical quantity distribution.As the hydrophobicity of the GDL surface increases,the coverage area of liquid water on the GDL surface decreases,which initially enhances oxygen transport and fuel cell performance.However,this also leads to slower water drainage,causing slower performance recovery in the later stage.In this study,the fuel cell performance is best when the contact angle of the GDL surface is 160°,while the performance is lowest when the contact angle is 110°.The study provides theoretical and model support for understanding the mechanisms underlying the influence of two-phase flow within flow channels and for the design of high-performance fuel cells.关键词
燃料电池/流道/气液两相流/性能/均匀性/计算流体力学Key words
fuel cell/flow channel/gas-liquid flow/performance/uniformity/computational fluid dynamics分类
信息技术与安全科学引用本文复制引用
张晓卿,马骁,帅石金..考虑扩散层表面润湿性的流道内两相流对燃料电池性能影响研究[J].化工学报,2025,76(11):5574-5583,10.基金项目
中国博士后科学基金项目(2023TQ0170,2024M751668) （2023TQ0170,2024M751668）
