Abstract Uneven flow resistance can cause a cell to have uneven distributions of temperature and current density. In this study, a three-dimensional (3-D) model with modified parallel flow field patterns is constructed, and simulation is performed to study the reactant distribution and cell performance. Two different modified parallel flow fields are applied to the cathode and anode. The flow characteristics and current density, temperature, and water distributions are analyzed with computational fluid dynamics (CFD). The results indicate that the hydrogen and air reactants are uniformly distributed in a gas diffusion layer (GDL) and gradually decrease from the inlet to the outlet for all channels. The numerical results show that modified parallel flow fields provide evenly distributed current density generation, where the reactant is uniformly distributed in the flow field. This property reduced the likelihood of forming hot spots and consequently enhanced the PEMFC performance.

中文翻译：

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三维改进平行流场设计对质子交换膜燃料电池性能影响的数值研究

摘要 不均匀的流阻会导致电池的温度和电流密度分布不​​均匀。在本研究中，构建了具有改进的平行流场模式的三维 (3-D) 模型，并进行了模拟以研究反应物分布和电池性能。两个不同的修正平行流场被施加到阴极和阳极。使用计算流体动力学 (CFD) 分析流动特性和电流密度、温度和水分布。结果表明，氢气和空气反应物均匀分布在气体扩散层 (GDL) 中，并从所有通道的入口到出口逐渐减少。数值结果表明，修正的平行流场提供了均匀分布的电流密度生成，其中反应物在流场中均匀分布。这种特性降低了形成热点的可能性，从而提高了 PEMFC 的性能。