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Visualization of Automotive Catalytic Converter Internal Flows
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1986 by SAE International in United States
Annotation ability available
Internal flow details of a prototype dual-bed monolith converter were determined in water-flow visualization tests run on a full-scale transparent acrylic model. Using steadily flowing water seeded with a small quantity of tracer particles, fluid motion within transparent sections of the flow model was deduced from particle pathlines illuminated with a thin plane of laser light. Flow in the inlet transition separated from the diffuser walls and impinged as a constant-diameter jet on the leading face of the first monolith. Velocity profiles from streak photographs showed that the level of flow maldistribution in the first monolith was a function of Reynolds number. Secondary air injected between the monoliths was uniformly distributed along the major axis of the converter under all flow conditions. At dilution ratios of 16% or more the jet penetration was adequate to provide a uniform, well-mixed diluent distribution.
|Technical Paper||Sources of Monolith Catalytic Converter Pressure Loss|
|Technical Paper||Reducing Catalytic Converter Pressure Loss with Enhanced Inlet-Header Diffusion|
CitationWendland, D. and Matthes, W., "Visualization of Automotive Catalytic Converter Internal Flows," SAE Technical Paper 861554, 1986, https://doi.org/10.4271/861554.
- Sovran G. Fluid Mechanics of Internal Flows Elsevier Publishing Company New York, N.Y. 1967
- Angele B. Kirchner K. “The Poisoning of Noble Metal Catalysts by Phosphorus Compounds - III: The Deposition of Catalyst Poisons in Honeycomb Catalysts,” Chemical Engineering Science 35 1980 2101 2105
- Howitt J. S. Sekella T. C. “Flow Effects in Monolithic Honeycomb Automotive Catalytic Converters,” S.A.E. Paper 740244 February 25 March 1 1974
- Comfort E. H. “Monolithic Catalytic Converter Performance as a Function of Flow Distribution,” A.S.M.E. Paper 74-WA/HT-30 November 17-22 1974
- Cochran D. L. Kline S. J. “Use of Short, Flat Vanes for Producing Efficient Wide-Angle Two-Dimensional Subsonic Diffusers,” N.A.C.A Technical Note 4309 January 1959
- McDonald, A. T. Fox, R. W. Van Dewoestine R. V. “Effects of Swirling Inlet Flow on Pressure Recovery in Conical Diffusers,” Paper 71-84, AIAA 9th Aerospace Sciences Meeting January 1971
- Lemme C. D. Givens W. R. “Flow Through Catalytic Converters - An Analytical and Experimental Treatment,” S.A.E. Paper 740243 February 25 March 1 1974
- Daily J. W. Harleman D. R. F. Fluid Dynamics Addison-Wesley Publishing Company, Inc. Massachusetts 1966
- Marko, K. A. Li, P. Rimai, L. Ma, T. Davies M. “Flow Field Imaging for Quantitative Cycle Resolved Velocity Measurements in a Model Engine,” S.A.E. Paper 860022 February 24-28 1986
- Rolke R. W. “Afterburner Systems Study,” Shell Development Company Report PB-212 560 August 1972