A 3D-SCR model is established on the base of computational fluid dynamics and reaction kinetics. The reaction process is exactly reflected from time angles. Research indicates the physical and chemical concentration change of NO and NO2 in a spray cycle.%采用计算流体动力学与化学反应动力学结合的方法建立试验SCR催化器系统的三维模型,从时间的角度分析催化还原反应该过程.仿真研究表明了SCR系统在恒定工况条件下,一个喷射周期内反应物NO、NO2浓度分布随时间的推移而发生的物理、化学变化过程.
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