基于试验数据拟合的甲烷反应器流动仿真分析

田新娜¹，陈世林²，李泽宇¹，李姣秀³

1.中船动力研究院有限公司，上海  201208；2.上海中船三井造船柴油机有限公司，上海  200120；

3.上海海事大学商船学院，上海  201306

摘要：为研究甲烷反应器压降影响因素，基于某船舶发动机甲烷反应器试验测试数据，拟合多孔介质流体惯性阻力系数和黏性阻力系数，利用STAR-CCM+建立反应器模型并进行仿真计算，研究反应器内部流场均匀性及压降。结果表明：流体惯性阻力系数为340.82 kg/m⁴，流体黏性阻力系数为1 437.27 kg/（m³·s）时,仿真模型取得最优拟合结果；反应器压降主要由催化剂层的压降导致；催化剂入口废气流速均匀性达97%，废气分布均匀；催化剂废气温度影响平均流速，使试验压降与仿真压降有一定偏差。

关键词：甲烷反应器；多孔介质；催化剂；压降

Simulation of methane reactor flow based on experimental data fitting

TIAN Xinna¹, CHEN Shilin², LI Zeyu¹, LI Jiaoxiu³

1.China Shipbuilding Power Engineering Institute Co., Ltd., Shanghai 201208, China;

2.CSSC-MES Diesel Co., Ltd., Shanghai 200120, China;3.Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China

Abstract：Based on the experimental data of a certain ship engine methane reactor, the inertia resistance coefficient and viscosity resistance coefficient of porous media fluid are fitted. A reactor model is established using STAR-CCM+ and simulations are conducted to study the uniformity of the internal flow field and pressure drop in the reactor. The results show that when the fluid inertia resistance coefficient is 340.82 kg/m⁴ and the fluid viscosity resistance coefficient is 1 437.27 kg/(m³·s), the simulation model achieves the best fitting result. The pressure drop in the reactor is mainly caused by the pressure drop in the catalyst layer. The uniformity of exhaust gas flow rate at the catalyst inlet reaches 97%, which indicates a uniform distribution of exhaust gas. The temperature of catalyst exhaust gas affects the average flow rate, causing a certain deviation between the experimental pressure drop and the simulated pressure drop.

Keywords:methane reactor; porous media; catalyst; pressure drop