Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Numerical Study on the Effect of Volume Change of Light-Off Catalyst on Light-Off Performance

저온활성촉매변환기의 체적변화가 활성화 성능에 미치는 영향에 관한 수치적 연구

  • 정수진 (회원, 한양대학교 대학원) ;
  • 김우승 (회원, 한양대학교 기계공학과)
  • Published : 2000.11.01
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Abstract

HC and CO emissions during the cold start contribute the majority of the total emissions in the legislated driving cycles. Therefore, in order to minimize the cold-start emissions, the fast light-off techniques have been developed and presented in the literature. One of the most encouraging strategies for reducing start-up emissions is to place the light-off catalyst, in addition to the main under-body catalyst, near the engine exhaust manifold. This study numerically consider three-dimensional, unsteady compressible reacting flow in the light-off and under body catalyst to examine the impact of a light-off catalyst on thermal response of the under body catalyst and tail pipe emission. The effect of flow distribution on the temperature distribution and emission performance have also been examined. The present results show that flow distribution has a great influence on the temperature distribution in the monolith at the early stage of warm-up process and the ultimate conversion efficiency of light-off catalyst is severly deteriorated when the space velocity is above $100,000hr^{-1}$.

Keywords

References

  1. Prog. Energy Combust. Sci. v.23 Catalytic Automotive Exhaust After treatment Grigoris C. Koltsakis;Anastasios M. Stamatelos
  2. 自動車原動機 環境對應技術 井上悳太;近村銅可
  3. SAE Paper 960797 Study of Divided Converter Catalytic System Satisfying Quick Warm-up and High Heat Resistance Toshihiro Takada(et al.)
  4. SAE Paper 922338 Distribution of Warm-up and Underfloor Catalyst Volumes Douglas J. Ball
  5. SAE Paper 932765 A Warm-up and Underfloor Converter Parametric Study Douglas J. Ball
  6. SAE Paper 930386 Use of Light-Off Catalysts to Meet the California LEV/ULEV Standards J.C. Summers(et al.)
  7. 自動車技術會論文集 v.29 no.3 低公害自動車のためのCCC(Close-Coupled Catalyst)ツステムの評價 崔炳喆;金大中;孫建奭;李貴榮
  8. SAE Paper 961905 A Warm-Up-Underfloor Converter Parametric Study;Effects of Catalyst Technology on Emission Performance Douglas J. Ball
  9. 實用觸媒の 學理的 基磯硏究會 第9回 セミナ要旨集 自動車用三元系觸媒における 老化機構とみの對策 山田貞
  10. SAE Paper 710289 Mathematical Modeling of CO and HC Catalytic Converter Systems Kuo, J.C.(et al.)
  11. Ind. Eng. Chem. Production Research and Development v.21 Transients of Monolithic Catalytic Converters;Response to Step Changes in Freesream Temperature as Related to Controlling Automobile Emissions S. H. Oh;J.C. Cavendish
  12. Chemical Engineering Science v.53 no.13 Mass Transfer in Monolith Catalysts-CO Oxidation Experiments and Simulations Anna Holmgren;Bengt Andersson
  13. J. of Engineering for Gas Turbines and Power v.113 A Study of Inlet Flow Distortion Effects on Automotive Catalytic Converters G. Bella(et al.)
  14. SAE Paper 971025 CFD Investigation of the 3-Dimensional Unsteady Flow in the Catalytic Converter S-J Jeong;T-H Kim
  15. 自動車技術會論文集 v.27 no.3 觸媒暖機科程における昇溫及ぴ淨化擧動の解析 馬場直樹;大澤克幸
  16. Chem. Eng. Sic. v.44 no.9 Transient Operation of Monolith Catalytic Converters, A Two-Dimensional Reactor Model and the Effects of Radially Non-uniform Flow Distributions K. Zygourakis
  17. SAE Paper 880282 A Three-Dimensional Model for the Analysis of Transient Thermal and Conversion Characteristics of Monolithic Catalytic Converters D.K.S., Chen;S.H. Oh;E.J. Bissett;D. L. Van Ostram
  18. SAE Paper 980881 A Numerical Approach to Investigate Transient Thermal and Conversion Characteristics of Automotive Catalytic Converter S-J Jeong;W.S. Kim
  19. 대한기계학회논문집 B권 v.23 no.7 자동차용 촉매변환기의 최적설계를 위한 열 및 유동특성에 대한 수치적 연구 정수진;김우승
  20. 자동차공학회논문집 v.7 no.5 유동특성을 고려한 촉매변환기의 활성화(Light-Off) 성능에 관한 연구 정수진;김우승
  21. Ph.D Thesis Modeling and Simulation of Monolith Reactors Paul Victor keller
  22. The Preperties of Gases and Liquids(4th Ed) Reid, R.C.(et al.)
  23. Ind. Eng. Chem. Res. Dev. v.24 Reaction Kinetics on a Commercial Three-Way Catalyst;The CO-NO-O2-H2O System B. Subramaniam;A. Varama
  24. Ind. Eng. Chem. Prod. Res. Dev. v.12 no.4 Kinetic Study of Carbon Monoxide and Propylene Oxidation on Platinum Catalysts Voltz S. E.;Morgan C. R.;Lieberman D.;Jacob S. M.
  25. Trans. ASME v.75 An Investigation of Heat Transfer from an Inclined Flat Plate in Free Convection B. R. Rich
  26. SAE Paper 912372 Three-dimensional Simulation of Automotive Catalytic Converter Internal Flow M. C. Lai;J. Y. Kim
  27. SAE Paper 9300780 Optimization of Catalytic Converter Gas Flow Distribution by CFD Prediction H. Welten;H. Bresseler;F. Terres;H. Neumajer;D. Rammoser
  28. STAR-CD Ver. 3.0 Mannual Computational Fluid Dynamics Ltd.
  29. Catalytic Reactor Design M. Orhan Tarhan
  30. Paper No. F2000H206, FISITA World Automotive Congress Numerical Analysis of Light-off Performance and Thermo-Fluid Characteristics in a Three-Way Monolithic Catalytic Converter S-J Jeong;W. S. Kim