| 柴油机选择性催化还原后处理系统建模 |
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| 引用本文： | 温苗苗,吕林.柴油机选择性催化还原后处理系统建模[J].武汉造船,2009(3):68-71. |
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| 作者姓名： | 温苗苗 吕林 |
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| 作者单位： | 武汉理工大学能源与动力工程学院,武汉430063 |
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| 基金项目： | 国家自然科学基金项目（批准号：50876078）. |
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| 摘 要： | 采用计算流体动力学（CFD）与化学反应动力学结合的方法，建立了柴油机尿素选择性催化还原排气后处理系统的三维数值模型，包括尿素水溶液蒸发及热解、催化还原化学反应等过程。在该模型基础上计算研究了1600r／min不同负荷（33％，49％，72％，100％）条件下SCR后处理系统的特性。结果表明模拟与试验结果吻合较好。通过不同结构形式的对比计算，提出了该系统的改进方案。
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| 关 键 词： | 选择性催化还原 氮氧化物 计算流体动力学 模拟 尿素水溶液 |
Modeling of the Urea-SCR Exhaust Post-treatment System for Diesel |
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| WEN Miao-miao,LV Lin.Modeling of the Urea-SCR Exhaust Post-treatment System for Diesel[J].Wuhan Shipbuilding,2009(3):68-71. |
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| Authors: | WEN Miao-miao LV Lin |
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| Institution: | (School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China) |
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| Abstract: | A modeling approach to design optimization of selective catalytic reduction （SCR） system with the aid of CFD coupled with chemical reaction dynamics was present including evaporation of urea-water-solution, subsequent thermal decomposition and surface catalytic reactions in the monolith. The performance of SCR system under different loads （33%, 49%, 72%, 100% load） at 1600 r/min were investigated base on the model. The simulation results showed a good agreement with test bench results. The SCR systems with different structures were evaluated by calculating, and an improvement measure was put forward. |
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| Keywords: | SCR NOx CFD simulation urea water solution |
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