SOFC多孔阳极内微尺度流动的Lattice-Boltzmann模拟

摘要

为了模拟阳极支撑固体氧化物燃料电池多子阳极内的微尺度流动,利用Lattice-Boltzmann方法建立了多组分气体流动模型,结合多孔介质的数值构造方法,验证了复杂多孔介质内微尺度流动模型的有效性,研究了多孔阳极微结构和燃料组分对质量传递和浓差极化的影响.计算结果表明:Lattice-Boltzmann方法适用于多孔电极内的微尺度流动模拟,阳极浓差极化与燃料组分、电流密度以及阳极微结构相关.%in order to simulate the micro-scale flow in porous anode of anode-supported solid oxide fuel cell, a multi-component gas flow model was built through Lattice-Boltzmann method and the porous media was reconstructed by numerical technique. Based on the validation of micro-scale flow model of complex porous media, the effect of microstructure and fuel component on mass transport and concentration polarization was analyzed. Conclusions are drawn out: Lattice-Boltzmann method is competent for the simulation of micro-scale flow in porous electrode, and the concentration polarization of SOFC anode is highly related to fuel component, current density and anode microstructure.