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Simulation of the Unsteady Gas Flow through a Three-way Automotive Catalyst: A Preliminary Study
Technical Paper
2005-01-2216
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a model of a 1.8-litre four-cylinder four-stroke gasoline engine fitted with a close-coupled three-way catalyst (TWC). Designed to meet EURO 3 emissions standards, the engine includes some advanced emission control features in addition to the TWC, namely: variable valve timing (VVT), swirl control plates, and exhaust gas recirculation (EGR). Gas flow is treated as one-dimensional (1D) and unsteady in the engine ducting and in the catalyst. Reflection and transmission of pressure waves at the boundaries of the catalyst monolith are modelled. In-cylinder combustion is represented by a two-zone burn model with dissociation and reaction kinetics. A single Wiebe analysis of measured in-cylinder pressure data is used to determine the mass fraction burned as a function of crank angle (CA) at each engine speed. Measured data from steady-state dynamometer tests are presented for operation at wide open throttle (WOT) over a range of engine speeds. These results include CA-resolved traces of pressure at various locations throughout the engine together with cycle-averaged traces of gas composition entering the catalyst as indicated by a fast-response emissions analyser. Simulated engine performance and pressure wave action throughout the engine are well validated by the measured data.
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McMackin, M., McCullough, G., and McDowell, A., "Simulation of the Unsteady Gas Flow through a Three-way Automotive Catalyst: A Preliminary Study," SAE Technical Paper 2005-01-2216, 2005, https://doi.org/10.4271/2005-01-2216.Also In
References
- Liu Z. Benjamin S.F. Roberts C.A. Zhao H. Arias-Garcia A. “A Coupled 1D/3D Simulation for the Flow Behaviour Inside a Close-Coupled Catalytic Converter,” SAE paper 2003-01-1875
- Chow A. Wyszynski M.L. “Thermodynamic Modelling of Complete Engine Systems - A Review,” Proceedings - IMECHE Part D 213 403 415 1999
- McCartan C.D. McEntee P.T. Fleck R. Blair G.P. Mackey D.O. “Computer Simulation of the Performance of a 1.9 Litre Direct Injection Diesel Engine,” SAE paper 2002-01-0070
- Pontikakis G. Stamatelos A. “Mathematical Modelling of Catalytic Exhaust Systems for EURO-3 and EURO-4 Emissions Standards,” Proceedings - IMECHE Part D 215 1005 1016 2001
- Park S. Kim H. Cho K. Kim W. “Experimental and Computational Study of Flow Characteristics in Exhaust Manifold and CCC (Close-Coupled Catalyst),” SAE paper 980128
- Kim H. Park S. Myung C. Cho K. “A Study of Flow Characteristics Inside the Two Types of Exhaust Manifold and CCC Systems,” SAE paper 1999-01-0457
- Park S. Kim H.Y. Chung J.T. Cho Y. Chang H.G. “Simulation on the Characteristic of Gas Flow and Mixing for the Location of the Oxygen Sensor in the Exhaust System,” Proceedings - IMECHE Part D 216 161 169 2002
- Benjamin S.F. Roberts C.A. “Warm-Up of an Automotive Catalyst Substrate by Pulsating Flow: A Single Channel Modelling Approach,” International Journal of Heat and Fluid Flow 21 717 726 2000
- Benjamin S.F. Roberts C.A. “Warming automotive catalysts with pulsating flows,” Proceedings - IMECHE Part D 215 891 910 2001
- Arias-Garcia A. Benjamin S.F. Zhao H. Farr S. “A Comparison of Steady, Pulsating Flow Measurements and CFD Simulations in Close Coupled Catalysts,” SAE paper 01FL-335
- Benjamin S.F. Roberts C.A. “Automotive Catalyst Warm-Up to Light-Off by Pulsating Engine Exhaust,” International Journal of Engine Research 5 125 148 2004
- Bressler H. Rammoser D. Neumaier H. Terres F. “Experimental and Predictive Investigation of a Close Coupled Catalyst Converter with Pulsating Flow,” SAE paper 960564
- Jeong S.-. Kim W.-. “A Three-Dimensional Numerical Study of the Effect of Pulsating Flow on Conversion Efficiency Inside a Catalytic Converter,” Proceedings - IMECHE Part D 215 45 62 2001
- Baruah P.C. Benson R.S. Gupta H.N. “Performance and Emission Predictions for a Multi-Cylinder Spark Ignition Engine with Catalytic Converter,” SAE paper 780672
- Payri F. Benajes J. Galindo J. “One-Dimensional Fluid-Dynamic Model for Catalytic Converters in Automotive Engines,” SAE paper 950785
- Onorati A. Ferrari G. Errico G. D Montenegro G. “The Prediction of 1D Unsteady Flows in the Exhaust System of a S.I. Engine Including Chemical Reactions in the Gas and Solid Phase,” SAE paper 2002-01-0003
- Douglas R. Carberry B.P. “Modelling of Oxidation Catalysts for Two-Stroke Cycle Engines,” SAE paper 961807
- McCullough G. Douglas R. “Reaction Mapping during Light-Off in a Two-Stroke Oxidation Catalyst,” SAE paper 961808
- McCullough G. “An Investigation into the Deactivation and Characterisation of Two-Stroke Oxidation Catalysts,” QUB 1997
- McDowell A.P.N. Douglas R. McCullough G. Kee R.J. “Catalyst Deactivation on a Two-Stroke Engine,” SAE paper 982015
- McCullough G. Douglas R. McDowell A.P.N. Kenny R.G. “An Experimental Evaluation of the Oil Fouling Effects of Two-Stroke Oxidation Catalysts,” SAE paper 982014
- McCullough G. Douglas R. Cunningham G. Foley L. “The Development of a Two-Dimensional Transient Catalyst Model for Direct Injection Two-Stroke Applications,” Proceedings - IMECHE Part D 215 919 934 2001
- McCullough G. Douglas R. Cunningham G. Foley L. “The Validation of a Two-Dimensional Transient Catalyst Model for Direct Injection Two-Stroke Applications,” Proceedings - IMECHE Part D 215 935 956 2001
- Khossusi T. Douglas R. McCullough G. “Measurement of Oxygen Storage Capacity in Automotive Catalysts,” Proceedings - IMECHE Part D 217 727 734 2003
- Foley L. “Unsteady Gas Flow in Monolithic Catalysts,” QUB 1999
- www.optimum-power.com
- Blair G.P. Design and Simulation of Four-Stroke Engines SAE 1999
- McMackin M. McCullough G. McDowell A.N.P. “Computer Simulation of the Performance of a 1.8 Litre Gasoline Automotive Engine,” Proceedings of the International Conference on Vehicles Alternative Fuels & Environmental Protection (VAFSEP) 345 350 2004