不同流道结构质子交换膜燃料电池内传递现象的三维模拟

应用计算流体力学方法，建立了用于模拟质子交换膜燃料电池（PEMFC）传递特性和电化学性能的稳态、等温的三维数学模型。计算了传统流道和交叉梳状流道燃料电池的流场、电流密度和组分浓度等的多维分布。与传统流道的燃料电池相比，交叉梳状流道所产生的电极内强烈的强制对流机理提高了反应物和产物的传输速率，从而改善了电池的极限电流和极化性能等。利用模型估算的极化特性和文献实验结果吻合较好。

Three-dimensional modeling of transport phenomena in proton exchange membrane fuel cell with different fluid channel

Applying computational fluid dynamics method, a steady-state, three-dimensional mathematical model was developed for simulating transport characteristics and electrochemical performance of proton exchange membrane fuel cell (PEMFC). The multidimensional flow structure, reactant concentration distribution and current density of the fuel cell were computed. Comparison with a conventional flow field design fuel cell showed that interdigitated flow field provided higher transport rate of reactants to the catalyst layer and products from the catalyst layer; and enhanced limited current density and polarization performance by forced convective flow fields through the electrode. The performance curves predicted by this numerical modeling agreed well with the known experimental results.