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Visualization of Automotive Catalytic Converter Internal Flows
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English
Abstract
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.
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Authors
Citation
Wendland, D. and Matthes, W., "Visualization of Automotive Catalytic Converter Internal Flows," SAE Technical Paper 861554, 1986, https://doi.org/10.4271/861554.Also In
References
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