CAJ | 학술논문

采用格子-Boltzmann方法(LBM)直接从介观层次数值模拟了质子交换膜燃料电池(PEMFC)阴极催化层的传质和电化学反应过程.开发了二维程序;为了验证所编程序的正确性,建立了一个理想的二维规则模型,模拟得到的极化曲线和已有文献的极化曲线吻合较好.处理PEMFC阴极催化层的电镜扫描图得到了二维实际计算模型,应用LBM模拟得到了二维的O_2浓度和电势分布.表明LBM是一有效的分析PEMFC阴极催化层中传递和电化学反应过程的数值模拟方法.
채용격자-Boltzmann방법(LBM)직접종개관층차수치모의료질자교환막연료전지(PEMFC)음겁최화층적전질화전화학반응과정.개발료이유정서;위료험증소편정서적정학성,건립료일개이상적이유규칙모형,모의득도적겁화곡선화이유문헌적겁화곡선문합교호.처리PEMFC음겁최화층적전경소묘도득도료이유실제계산모형,응용LBM모의득도료이유적O_2농도화전세분포.표명LBM시일유효적분석PEMFC음겁최화층중전체화전화학반응과정적수치모의방법.
In this work, the Lattice Boltzmann Method (LBM) was applied to the simulation of mass transport and electrochemical reaction in a proton exchange membrane fuel cell (PEMFC) cathode catalyst layer. 2 D program was developed and then an idealized 2 D regular model was established to validate the program. Polarization curves from simulation show a good agreement with the results from literature. Then, LBM was applied directly on a 2 D practical microstructure established from SEM image of a PEMFC cathode catalyst layer. 2 D distribution of oxygen concentration and potential was obtained. From the results of this simulation the LBM can be considered as a promising numerical scheme to analyze mass transport and electrochemical reaction in PEMFC cathode catalyst layer.