This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Role of Computational Fluid Dynamics in Exhaust System Design and Development
Annotation ability available
Sector:
Language:
English
Abstract
Three dimensional simulations of the non reacting flow field within two different designs of close coupled catalytic converters have been performed. Close coupled catalytic converters are, by design, mounted very close to the engine exhaust manifold and the two components selected for this work are typical of the two approaches to manifold design namely cast and pressed. Block structured grids were developed from a combination of CAD data and paper drawings using both I-DEAS™ and PATRAN™ geometry modelling and meshing software. The flow-field was then calculated using the STAR-CD™ Finite Volume Computational Fluid Dynamics (CFD) software using an HP-720 workstation. Using the results of the CFD calculations the two exhaust designs were compared by calculating maldistribution indices of the velocity distribution within the monolith region. The results show that the component with the pressed manifold has on average a 28% lower maldistribution index than the component with the cast manifold.
Recommended Content
| Technical Paper | THE EXHAUST DISCHARGE AND PROPER MANIFOLD DESIGN |
| Technical Paper | Effect of Exhaust System Design on Engine Performance |
| Technical Paper | Exhaust System Design for a Four Cylinder Engine |
Authors
Citation
Baxendale, A., "The Role of Computational Fluid Dynamics in Exhaust System Design and Development," SAE Technical Paper 931072, 1993, https://doi.org/10.4271/931072.Also In
References
- Gosman A.D. “Computer Fluid Dynamics Applications to Automobile Design: Progress and Prospects” ATA - Ingegneria Automotoristica, Guigno-Luglio 1988 41 6-7 446 453
- Jasper T.S. Benjamin S.F. Girgis N.S. Cuttler D.H. “Computational Fluid Dynamics and its Application to Catalyst Exhaust Systems” Proceedings of the 25th ISATA Silver Jubilee International Symposium on Automotive Technology and Automation Florence, Italy June 1st - 5th 1992 169 176
- Abthoff J. Schuster H.D. “New Developments in Catalytic Converter Technology as Demonstrated by Mercedes-Benz 300 SL and 300 CE” SAE Paper 900267 1990
- Pearce T.C. Davies G.P. “The Efficiency of Automotive Exhaust Catalysts and the Effects of Component Failure” UK Transport and Road Research Laboratory Report 287 1990
- Bella G. Rocco V. Maggiore F. Stella F. Succi S. “Automotive Catalytic Converters Performance Evaluation: A Computational Approach” ATA - Ingegneria Automotoristica 44 4 April 1991 242 249
- Wendland D.W. Matthes W.R. “Visualization of Automotive Catalytic Converter Internal Flows” SAE Paper 861554 1986
- Charles D.L. Givens W.R. “Flow Through Catalytic Converters - An Analytical and Experimental Treatment” SAE Paper 740243 1974
- Lai M.C. Kim J.Y. “Three-Dimensional Simulations of Automotive Catalytic Converter Internal Flows” SAE Paper 910200 1991