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Study on Flow Characteristics of Automotive Catalytic Converters with Various Configurations
Technical Paper
2000-01-0208
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
A mathematical model of the flows in honeycomb monolith was established by an equivalent continuum approach, and the commercial code STAR-CD was utilized to simulate multi-dimensional steady turbulent room airflows in catalytic converters with different configurations. In order to verify the computing model, a pitot tube was used to measure the velocity distribution in the converter. Validations demonstrate that theoretical values agree well with experimental results.
Simulation results show that, the larger the inlet cone angle the more the pressure loss and maldistribution in converters, however, when the angle enlarges enough its effect on flows will be obviously decreased thereafter. An enhanced diffusion header has benefits to the flow characteristics. Compared with the inlet cone angle, the outlet cone angle has little influences on the performance of flows. The spherical shape of the front face of monoliths proposed by authors is capable of improving the flow distribution. The monolith location has no significant effects on the flow quality. In addition, the larger the gap between two monoliths the more uniform the flow distribution for the second monolith but the less for the first. These results offer a practical guide to the optimum design of automotive catalytic converters.
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Authors
- Shuai Shi-jin - State Key Laboratory of Automobile Safety and Energy Conservation, Tsinghua University
- Wang Jian-xin - State Key Laboratory of Automobile Safety and Energy Conservation, Tsinghua University
- Zhuang Ren-jun - State Key Laboratory of Automobile Safety and Energy Conservation, Tsinghua University
- Chen Jun-rui - State Key Laboratory of Automobile Safety and Energy Conservation, Tsinghua University
Citation
Shi-jin, S., Jian-xin, W., Ren-jun, Z., and Jun-rui, C., "Study on Flow Characteristics of Automotive Catalytic Converters with Various Configurations," SAE Technical Paper 2000-01-0208, 2000, https://doi.org/10.4271/2000-01-0208.Data Sets - Support Documents
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Also In
Exhaust Aftertreatment Modeling and Gasoline Direct Injection Aftertreatment
Number: SP-1533; Published: 2000-03-06
Number: SP-1533; Published: 2000-03-06
References
- Howitt J.S. Sekella T.C. “Flow effects in monolithic honeycomb automotive catalytic converters” SAE Paper 740244
- Wendland D.W. Matthes W.R. “Visualization of automotive catalytic converter internal flow” SAE Paper 861554
- Lai M.C. Kim J.Y. Cheng C.Y. Li P. Chui G. Pakko J.D. “Three-dimensional simulations of automotive catalytic converter internal flow” SAE Paper 910200
- Jeong S.J. Kim T.H. “CFD investigation of the 3-dimensional unsteady flow in the catalytic converter” SAE Paper 971025
- STAR-CD Manual 1999
- Zygourakis K. “Transient operation of monolith catalytic converter: A two-dimensional reactor model and the effects of radially nonuniform flow distributions” Chem. Eng. Sci. 44 1989 2075 2086
- Wendland D.W. Kreucher J.E. Andersen E. “Reducing catalytic converter pressure loss with enhanced inlet-header diffusion” SAE Paper 952398
- Shuai S.J. Wang J.X. Zhuang R.J. Chen J.R. “Effects of the structure of automotive catalytic converters on flow distributions” Journal of Chinese Automotive Engineering