基于多尺度耦合的管式SOFC数值模拟  

Numerical Simulation of Tubular Solid Oxide Fuel Cell Based on Multi-Scale Coupling

作　　者：马旭[1] 杨晨[2] MA Xu;YANG Chen(Zhuhai City Polytechnic,Guangdong Zhuhai 519090,China;School of Engergy and Power Engineering Chongqing University,Chongqing 400044,China)

机构地区：[1]珠海城市职业技术学院,广东珠海519090 [2]重庆大学能源与动力工程学院,重庆400044

出　　处：《计算机仿真》2021年第5期70-74,共5页Computer Simulation

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.

关 键 词：管式固体氧化物燃料电池 多尺度耦合 格子玻尔兹曼方法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]