基于飞机翼型低流阻的灵感,提出一种新型的翼型交叉流场（ACFF）。首先,通过正交试验对ACFF的几何形状进行优化,确定最佳的几何参数和水平组合;随后,利用三维数值解析方法,研究优化后的ACFF（ACFF-49）对PEMFC输出性能的影响;最后,使用电池净功率密度这一性能指标来权衡流场中压降和有效功率的平衡问题。结果表明：ACFF具有较好的传质能力和较低的泵送功率损失,且气体扩散层（GDL）和催化剂层（CL）界面的压强和温度分布均匀。此外,通过增加温度、压强和氧质量分数分布的均匀程度,PEMFC中出现局部热点和水淹现象的可能性会降低。
Abstract
Based on the inspiration of low flow resistance of aircraft airfoil, a new type of airfoil cross flow field （ACFF） is proposed. Firstly, the geometry of the ACFF is optimized through the utilization of orthogonal tests, to determine the combination of optimal geometric parameters and levels. Subsequently, the impact of the optimized ACFF （ACFF-49) on the output performance of the PEMFC is investigated through the implementation of a three-dimensional numerical analysis method. Finally, the net power density of the cell as a performance metric, is employed to assess the equilibrium between the pressure drop and the effective power within the flow field. The findings demonstrate that the ACFF exhibits enhanced mass transfer proficiency and diminished pumping power loss. Furthermore, the pressure and temperature distributions at the interface of the gas diffusion layer （GDL） and the catalyst layer （CL） are found to be uniform. Additionally, by enhancing the homogeneity of temperature, pressure, and oxygen mass fraction distributions, the probability of local hot spots and water flooding in the PEMFC is diminished.
关键词
质子交换膜燃料电池 /
水热管理 /
数值模拟 /
正交试验 /
翼型交叉流场
Key words
PEMFC /
hydrothermal management /
numerical simulation /
orthogonal test /
airfoil cross flow field
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基金
内蒙古自治区高等学校科学研究项目（NJZZ23075）; 自治区直属高校基本科研业务费项目（JY20220267）
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