【摘要】 阴极流道形状对质子交换膜燃料电池阴极室气体分布、微孔层排水性能及输出性能具有重要影响。本文通过构建单流道三维非等温两相流模型，研究了渐扩流道和三维波浪形流道结构对燃料电池输出性能的影响规律；提出了渐扩型三维波浪流道的双重强化方案，并研究该流道结构对质子交换膜燃料电池内部反应气体扩散运输、微孔层内液态水的排除以及输出性能的影响。结果表明：渐扩流道和三维波浪流道均能提升电池输出性能，功率密度最大分别可增加4%、1.13%；双重强化的渐扩型三维波浪流道在促进氧气扩散运输的同时，还使液态水的排除能力得到提升，排水性能最高提升了4.6%，增强了电池的输出特性，功率密度最大可提升4.04%。更多还原

【Abstract】 The shape of the cathode flow channel has a significant impact on the gas distribution, drainage performance of the microporous layer, and output performance of proton exchange membrane fuel cell. In this study, a three-dimensional non-isothermal two-phase flow model was developed to investigate the influence of expanding flow channels and three-dimensional wavy flow channel structures on the output performance of fuel cell. A dual enhancement scheme for an expanding three-dimensional wavy flow channel was proposed. The study also explored the effects of this channel structure on the diffusion and transport of reaction gases inside the PEMFC, the elimination of liquid water in the microporous layer, and the output performance. The results indicate that both expanding flow channels and three-dimensional wavy flow channels can enhance the output performance of the fuel cell, with maximum power density increases of 4% and 1.13%, respectively.The dual-enhanced expanding three-dimensional wavy flow channel not only promotes oxygen diffusion transport but also improves the ability to eliminate liquid water, resulting in a maximum 4.6%enhancement in drainage performance. This enhances the output characteristics of the cell, with a maximum power density increase of 4.04%.更多还原