| 柴油机Urea-SCR系统喷射雾化的数值模拟 |
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| 引用本文： | 谭理刚,何利华,寇传富,江俊豪,龚金科.柴油机Urea-SCR系统喷射雾化的数值模拟[J].环境工程学报,2014,8(4):1554-1560. |
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| 作者姓名： | 谭理刚 何利华 寇传富 江俊豪 龚金科 |
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| 作者单位： | 1. 湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082;1. 湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082;1. 湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082;2. 广西玉柴机器股份有限公司, 玉林 537000;1. 湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082;1. 湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082 |
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| 基金项目： | 国家自然科学基金资助项目（51276056）；湖南省科技计划资助项目（2012GK3155） |
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| 摘 要： | 为研究柴油机Urea-SCR系统喷射雾化规律,应用CFD软件建立喷射雾化模型,对喷嘴喷射距离、喷射位置与方向、喷孔数目与孔径对催化剂载体入口处的浓度分布情况的影响进行了数值模拟。结果表明,喷嘴距反应器距离为排气管直径5倍为宜;采用四喷孔、孔径为0.5 mm、喷嘴处于管道中心,喷射方向为径向时喷射雾化均匀性最好。通过台架实验,验证了采用喷距5D、径向、四孔、小孔径喷嘴方案可使NOx的转化率达到95%以上。
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| 关 键 词： | 柴油机 SCR 喷射雾化 数值模拟 |
Numerical simulation on spray atomization of diesel engine Urea-SCR system |
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| Tan Ligang,He Lihu,Kou Chuanfu,Jiang Junhao and Gong Jinke.Numerical simulation on spray atomization of diesel engine Urea-SCR system[J].Techniques and Equipment for Environmental Pollution Control,2014,8(4):1554-1560. |
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| Authors: | Tan Ligang He Lihu Kou Chuanfu Jiang Junhao and Gong Jinke |
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| Institution: | 1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;2. Guangxi Yuchai Machinery Co., Ltd, Yulin 537000, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China |
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| Abstract: | In order to investigate the spray atomization of diesel engine Urea-SCR system,the spray atomization model was set up and the performances were studied by using the CFD software.The influences of nozzle jet distance,jet position and direction,nozzle number and size on the concentration distribution of fluid drop at the entrance of catalyst carrier were simulated numerically.The results show that the best distance from the nozzle to the reactor is 5 times as the exhaust pipe diameter. Using four orifices,0.5 mm aperture,nozzle in the pipe center and spray direction for radial will have the best result of spray atomization.With bench test,the NOx conversion rate can be improved to 95% or more. |
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| Keywords: | diesel engine selective catalytic reduction spray atomization numerical simulation |
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