This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Flow Uniformity Optimization for Diesel Aftertreatment Systems
Technical Paper
2006-01-1092
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In 2007 emissions regulations for on-road light to heavy duty Diesel trucks will require the use of Diesel Particulate Filters (DPFs). The uniform distribution of soot on the DPF is critical for adequate long term performance of these DPFs. This is especially true when cordierite is used instead of silicon carbide for the DPF substrate, due to the reduced thermal conductivity and reduced peak temperature capability of cordierite. In addition to flow uniformity, an inverted flow pattern where more of the flow is forced radially outward on the substrate face could be beneficial to counteract thermal losses in the converter.
This paper describes a dispersion device that can improve flow geometry with a low backpressure penalty. Computational fluid dynamics (CFD) results and experimental data are presented for this device. Additionally, cone design options are explored, and CFD analysis results of the cone design are presented. A parametric study is also described showing the boundary conditions that have the highest impact on CFD results of flow uniformity. This research has shown that substantial improvements in flow uniformity for large diameter substrates can be made through cone optimization. Further improvements in flow distribution can be made with the use of a dispersion device with little to no backpressure penalty if the device is optimized.
Recommended Content
Authors
Topic
Citation
Girard, J., Lacin, F., Hass, C., and Hodonsky, J., "Flow Uniformity Optimization for Diesel Aftertreatment Systems," SAE Technical Paper 2006-01-1092, 2006, https://doi.org/10.4271/2006-01-1092.Also In
References
- Weltens, H. Bressler, H. Terres, F. Neumaier, H. Rammoser, D. 1993 “Optimization of a Catalystic Converter Gas Flow Distribution by CFD Prediction,” SAE Paper Number 930780
- Bressler, H. Rammoser, D. Neumaier, H. Terres, F. 1996 “Experimental and Predictive Investigation of a Close Coupled Catalytic Converter with Pulsating Flow,” SAE Paper Number 960564
- FLUENT 2002 “Flow Through a Catalytic Converter,” Application Brief from Fluent, EX185
- Schwiedernoch, R. Tischer, S. Correa, C. Deutschmann, O. 2003 “Experimental and Numerical Study on the Transient Behavior of Partial Oxidation of Methane in a Catalytic Monolith,” Chemical Engineering Science 58 633 642
- Wendland, D.W. Kreucher, J.E. Andersen, E. 1996 “Reducing Catalytic Converter Pressure Loss,” Automotive Engineering June 1996 69 74
- Will N. S. Cornet P. 1998 “Effect of Flow Distribution on Emissions Performance of Catalytic Converters” SAE Paper Number 980936