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The Progressive Spin Inlet - Homogeneous Flow Distributions Under Stringent Conditions
Technical Paper
2003-01-0840
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new concept for achievement of homogeneous flow distributions in catalytic converters and particulate traps is presented. New applications such as NOx-adsorbers, SCR-catalysts and diesel particulate filters call for more homogeneous flow distributions. The new concept of the progressive spin inlet serves for homogeneous flow distribution within a short inlet cone. A spin is imposed on the flow at the outer radius of the catalyst inlet using helical-type flow elements. It is essential that the centre part of the flow is almost free of spin.
Best results can be obtained when the spin elements are designed to impose a progressive spin. The combination of a progressive slope angle and a progressive height serves for a relative minimum in pressure drop.
It is shown, that the progressive spin element also proves very good results with eccentric arrangements of the catalyst inlet cone. The parameters are optimised using CFD-calculations. The results agree well with velocity profile measurements and with flow visualisation in the catalyst inlet.
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Citation
Gaiser, G., Oesterle, J., Braun, J., and Zacke, P., "The Progressive Spin Inlet - Homogeneous Flow Distributions Under Stringent Conditions," SAE Technical Paper 2003-01-0840, 2003, https://doi.org/10.4271/2003-01-0840.Also In
Diesel Emission Measurement, Modeling, & Control from the SAE 2003 World Congress on CD-ROM
Number: SP-1754CD; Published: 2003-03-03
Number: SP-1754CD; Published: 2003-03-03
References
- Zygourakis, K. Transient operation of monolithic catalytic converters: a two-dimensional reactor model and the effects of radially nonuniform flow distributions Chemical Engineering Science 44 2075 2086 1989
- Bella, G. Rocco, V. Maggiore, M. A study of flow distortion effects on automotive catalytic converters Journal of engineering for gas turbines and power 113 419 426 1991
- Howitt, S. Sekella, T.C. Flow effects in monolithic automotive catalytic converters SAE 1974
- Gaiser, G. Design of the inlet region of automotive catalytic converters for a uniform flow distribution 8 th International Symposium on Flow Visualization 1998 Sorrento
- Maus, W. Brück, R. The conical converter and its potential use for future close-coupled converter concepts SAE 980414 1998
- Corning contura substrate Corning auto emissions magazine 11 1998