SCR催化转化器内置引射器CFD设计优化
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- 英文论文题名：CFD Design Optimization for the Built-in Ejector of SCR Converter
- 论文作者：张运 ; 余皎 ; 王乾
- 英文论文作者：Zhang Yun Yu Jiao Wang Qian Suzhou Powergreen Emission Solution System Co.ltd
- 年：2013
- 作者机构：苏州派格丽减排系统有限公司;
- 论文关键词：SCR ; CFD ; 优化设计 ; 引射
- 英文论文关键词：SCR ; CFD ; Optimal design ; Ejector
- 会议召开时间：2013-11-26
- 会议录名称：2013中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2013 SAE-China Congress
- 语种：中文
- 分类号：U464.134.4
- 学会代码：QCGC
- 会议名称：2013中国汽车工程学会年会
- 会议地点：中国北京
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：6
- 文件大小：2153k
- 原文格式：O
- 会议级别：全国
摘要
采用CFD技术,对四种设计方案的箱式SCR催化转化器与其内置引射器所组成的排气引射系统进行了整场离散、整场求解,得到了各自在不同发动机转速下的流场分布特性。以催化转化器压力损失、载体前端面流动均匀性系数和引射压力为评价指标,对四种引射器结构设计方案进行可行性判断,并对其进行优化设计。在试验测试阶段,基于优化设计方案制作的样件对发动机性能无影响,在目标工况点下其平均排灰效率达到了87%,满足不低于80%的设计指标,最终得到了符合设计要求的排气引射系统。
The paper is used the CFD simulation analysis technology.The flow field for the four design objects of exhaust ejector system which consists of SCR converter and its built-in ejector is researched in the different speed case of the Automotive engine.The whole running pressure loss of SCR converter,the flow uniformity coefficient of the intake face of catalyst carrier and ejector pressure is used the quality assessment index.In order to estimate,if the four ejector design objects satisfy the design requirement and optimize for the exhaust ejector structure.The sample of ejector system has been made based on optimized CAD model.After verified by rig-test,the optimized ejector system has no effect on engine performance,and its average ash-discharge rate in the target operating point up to 87 percent meets design requirements of no less than 80 percent.Finally,get the exhaust ejector system which meets design target.
The paper is used the CFD simulation analysis technology.The flow field for the four design objects of exhaust ejector system which consists of SCR converter and its built-in ejector is researched in the different speed case of the Automotive engine.The whole running pressure loss of SCR converter,the flow uniformity coefficient of the intake face of catalyst carrier and ejector pressure is used the quality assessment index.In order to estimate,if the four ejector design objects satisfy the design requirement and optimize for the exhaust ejector structure.The sample of ejector system has been made based on optimized CAD model.After verified by rig-test,the optimized ejector system has no effect on engine performance,and its average ash-discharge rate in the target operating point up to 87 percent meets design requirements of no less than 80 percent.Finally,get the exhaust ejector system which meets design target.
引文
[1]张保成,莫丽东,李保集.重载车辆排气引射抽尘器设计[J].北京理工大学学报,2010,30(6):665-669.
[2]毕小平,杨雨.坦克排气流场与温度场的计算流体力学分析[J].兵工学报,2008,29(9):1025-1028.
[3]李东明,王林,闻雪友.船用燃机排气引射器的数值模拟及试验研究[J].热能动力工程,2002,17(3): 226-230.
[4]武文豪,马成荫,张保成.废气引射抽尘流场数值模拟[J].装备制造技术,2006,(4):41-43.
[5]谷芳,刘伯潭,李洪亮,潘书杰.基于CFD数值模拟的汽车排气系统结构分析[J].内燃机学报,2007,25 (4):358-364.
[6]Min - Ho Kim.Three - Dimensional Numerical Study on the Pulsating Flow Inside Automotive Muffler With Complicated Flow Path[C].SAE Paper 2001 -01 -0944,2001.
[7]Kiminobu Hirata,Nobuhiko Masaki,Hiroki Ueno.Development of Urea - SCR System for Heavy - Duty Commercial Vehicles [C].SAE Paper 2005 -01-1860,2005.
[8]Daniel Chatterjee,Thomas Burkhardt,Brigitte Bandl - Konrad.Numerical Simulation of Aammonia SCRcatalytic Converters:Model Development and Application[C]. SAE Paper 2005 -01 -0965,2005.
[9]刘伟,范爱武,黄晓明.多孔介质传热传质理论及应用[M].北京:科学出版社,2006.
[2]毕小平,杨雨.坦克排气流场与温度场的计算流体力学分析[J].兵工学报,2008,29(9):1025-1028.
[3]李东明,王林,闻雪友.船用燃机排气引射器的数值模拟及试验研究[J].热能动力工程,2002,17(3): 226-230.
[4]武文豪,马成荫,张保成.废气引射抽尘流场数值模拟[J].装备制造技术,2006,(4):41-43.
[5]谷芳,刘伯潭,李洪亮,潘书杰.基于CFD数值模拟的汽车排气系统结构分析[J].内燃机学报,2007,25 (4):358-364.
[6]Min - Ho Kim.Three - Dimensional Numerical Study on the Pulsating Flow Inside Automotive Muffler With Complicated Flow Path[C].SAE Paper 2001 -01 -0944,2001.
[7]Kiminobu Hirata,Nobuhiko Masaki,Hiroki Ueno.Development of Urea - SCR System for Heavy - Duty Commercial Vehicles [C].SAE Paper 2005 -01-1860,2005.
[8]Daniel Chatterjee,Thomas Burkhardt,Brigitte Bandl - Konrad.Numerical Simulation of Aammonia SCRcatalytic Converters:Model Development and Application[C]. SAE Paper 2005 -01 -0965,2005.
[9]刘伟,范爱武,黄晓明.多孔介质传热传质理论及应用[M].北京:科学出版社,2006.