| 排气系统的数值模拟及优化设计 |
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| 引用本文： | 谷芳,刘伯潭,潘书杰.排气系统的数值模拟及优化设计[J].汽车工程,2007,29(11):950-953,957. |
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| 作者姓名： | 谷芳 刘伯潭 潘书杰 |
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| 作者单位： | 1. 天津大学内燃机研究所,天津,300072;天津市机动车尾气催化与净化工程中心,天津,300457
2. 天津市机动车尾气催化与净化工程中心,天津,300457 |
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| 摘 要： | 建立了汽车排气系统的三维计算流体力学模型,并采用并行计算方法对某排气系统的5款设计方案进行了模拟计算。以排气背压为评判准则,方案3背压最大,方案2背压最小,方案1、4和5的背压基本接近。通过对5种设计方案的催化转化器、消声器等部件进行详细的流场分析,找到了各款排气系统背压产生的主要原因,并提出了进一步的改进措施,确定了排气系统的最佳方案。
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| 关 键 词： | 排气系统 计算流体力学 并行计算 优化设计 |
| 修稿时间： | 2006-10-082006-12-29 |
Numerical Simulation and Optimal Design for Automotive Exhaust Systems |
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| Gu Fang,Liu Botan,Pan Shujie.Numerical Simulation and Optimal Design for Automotive Exhaust Systems[J].Automotive Engineering,2007,29(11):950-953,957. |
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| Authors: | Gu Fang Liu Botan Pan Shujie |
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| Institution: | 1. Tianjin Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072; 2. Tianjin Engineering Center for Catalytic Purification of Vehicle Exhaust, Tianjin 300457 |
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| Abstract: | A three-dimensional computational fluid dynamics(CFD) model for automotive exhaust system is established and a simulation calculation on 5 design schemes of exhaust system is performed by adopting parallel computing.Then taking exhaust back pressure as judging criterion,the flow field of catalytic converter,muffler and other components of exhaust system in 5 design schemes are analyzed in detail,and the main causes of back pressure generation in each design scheme of exhaust system are found.Finally some measures for further improvement are brought forward,and the best scheme of exhaust system is determined. |
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| Keywords: | Exhaust system CFD Parallel computing Optimal design |
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