为减少焦炉煤气燃烧室数值模拟的计算时长，基于直接关系图法和敏感性分析法对GRIMech 3.0详细机理进行简化，通过理想反应器计算和二维数值模拟验证简化机理的有效性。结果表明：在较宽的参数范围内（初始温度300~800 K，压力0.1~2 MPa和当量比0.5~1.4），含25组分、134步反应的简化机理可以精确计算焦炉煤气的层流火焰传播速度、点火延迟时间、火焰温度以及中间燃烧组分；得到的简化机理能够有效模拟射流火焰的反应物消耗、产物生成、温度以及中间产物分布等特征，在保证计算精度的前提下，大幅减少了数值模拟的计算时长。

In order to decrease the calculation time of numerical simulation of combustion chamber using coke oven gas (COG),the detailed mechanism of GRIMech 3.0 was simplified based on direct relation graph (DRG) and sensitivity analysis (SA) methods.The validity of simplified mechanism was verified via the ideal reactor calculation and 2D numerical simulation.The results show that the simplified mechanism including 25 components and 134 elementary reactions can accurately calculate the laminar flame propagation speed,ignition delay time,flame temperature and the intermediate combustion components of COG in the wider ranges of the initial temperature(300 K to 800 K),pressure (0.1 MPa to 2 MPa) and equivalence ratio (0.5 to 1.4).The achieved simplified mechanism can effectively simulate the characteristics of reactant consumption,product generation,temperature and the intermediate product distribution of the jet flame.On the premise of ensuring the calculation accuracy,the simplified mechanism greatly decreases the calculation time of numerical simulation.

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