NDLI: A Modelling Approach to the Design Optimization of Catalytic Converters of I.C. Engines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chen, Ming Schirmer, Karen
Copyright Year	2003
Abstract	In this paper, a modelling approach to the design optimization of catalytic converters is presented. The first step of the optimization is the model-assisted sizing of catalysts. For a given inlet exhaust condition, a semi-empirical, experimentally calibrated, 0-D steady state catalyst model is employed to sort through a data base of catalysts under given restraints, yielding few successful candidates. Following this screening process, a 1-D transient plug-flow catalyst model is used to analyze the species concentrations and the temperature variation across the catalyst. The second step deals with the flow optimization of the catalyst converter under the given geometric restraints. A commercially available CFD package is employed to simulate isothermal flow and to evaluate flow uniformity characteristics in the catalytic converter. The substrate is modelled as porous media, where viscous and initial resistances are specified via empirical formula. With the help of the CFD tool, the flow in the converter can be optimized using appropriate boundary layer control methods. In a specific example, the effects of perforated plate on the flow separation in a wide-angle diffuser are demonstrated. This paper also addresses the issue of flow resistance of perforated plates.
Sponsorship	Internal Combustion Engine Division and Rail Transportation Division
Starting Page	201
Ending Page	207
Page Count	7
File Format	PDF
ISBN	0791841618
DOI	10.1115/ICEF2003-0729
Volume Number	Design and Control of Diesel and Natural Gas Engines for Industrial and Rail Transportation Applications
Conference Proceedings	ASME 2003 Internal Combustion Engine and Rail Transportation Divisions Fall Technical Conference
Language	English
Publisher Date	2003-09-07
Publisher Place	Erie, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Catalysts Computational fluid dynamics Flow separation Porous materials Catalytic converters Modeling Flow (dynamics) Steady state Engines Optimization Exhaust systems Transients (dynamics) Design Databases Plates (structures) Diffusers Boundary layers
Content Type	Text
Resource Type	Article

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