摘要
基于多尺度耦合模拟的思想,采用格子玻尔兹曼方法建立管式固体氧化物燃料电池(SOFC)电化学反应扩散数学模型,采用质量、动量、能力守恒方程建立CFD数学模型,并以反应放热量作为边界条件输入CFD模型中计算传热、流动问题。结果表明,H2的浓度和反应时间随反应温度逐渐降低,电流密度随反应温度逐渐增加,空气流道中的气体温度和管壁温度沿着流动方向逐渐升高,流道内部的温度随空气流速的增加而逐渐降低。表明多尺度耦合方法模拟管式SOFC是行之有效的,在一定程度上解决了管式SOFC介观尺度和宏观尺度多物理场耦合的问题。
Based on the idea of multi-scale coupling simulation, the tubular SOFC electrochemical reaction-diffusion mathematical model was established by using the lattice Boltzmann method, and the CFD mathematical model was established by using the conservation equations of mass, momentum and capacity. The results showed that the concentration and reaction time of H2 gradually decreased with the reaction temperature, and the current density gradually increased with the reaction temperature. The gas temperature and wall temperature in the air passage gradually increased along the flow direction. The faster the air velocity was, the more heat was taken away, and the lower the overall temperature of the battery. It is proved that the multi-scale coupling method is effective to simulate the tubular SOFC, and solves the problem of the mesoscopic and macroscopic coupling of the tubular SOFC to some extent.
作者
马旭
杨晨
MA Xu;YANG Chen(Zhuhai City Polytechnic,Guangdong Zhuhai 519090,China;School of Engergy and Power Engineering Chongqing University,Chongqing 400044,China)
出处
《计算机仿真》
北大核心
2021年第5期70-74,共5页
Computer Simulation
