An effective regeneration is needed to remove the accumulated soot in a Diesel Particulate Filter (DPF). However, the sudden heat release by soot oxidation during an uncontrolled thermal regeneration process may cause the substrate of a DPF to overheat. The consequent thermal stress could even result in structural failure. In this paper, a cone-dimensional transient model was employed to describe the exhaust flow, heat transfer, and chemical reaction processes within the DPF substrate during regeneration. The model was validated preliminarily against the experimental data of previous researchers. By using this mode, a variety of uncontrolled regeneration processes were simulated to analyze the different mechanisms of DPF overheating. The results show that the exhaust temperature, oxygen concentration, and PM loading are three major factors that effect DPF overheating. Furthermore, the tendency of uncontrolled thermal runaway could be reduced by changing either the thermal runaway could be reduced by changing either the thermal properties or the structure of the DPF substrate.
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ASME 2004 Internal Combustion Engine Division Fall Technical Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
0-7918-3746-7
PROCEEDINGS PAPER
A Numerical Study on Uncontrolled Regeneration Processes in Diesel Particulate Filters
Dong Wang,
Dong Wang
University of Windsor, Windsor, Ontario, Canada
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Meiping Wang,
Meiping Wang
University of Windsor, Windsor, Ontario, Canada
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Graham T. Reader,
Graham T. Reader
University of Windsor, Windsor, Ontario, Canada
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Ming Zheng
Ming Zheng
University of Windsor, Windsor, Ontario, Canada
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Dong Wang
University of Windsor, Windsor, Ontario, Canada
Meiping Wang
University of Windsor, Windsor, Ontario, Canada
Graham T. Reader
University of Windsor, Windsor, Ontario, Canada
Ming Zheng
University of Windsor, Windsor, Ontario, Canada
Paper No:
ICEF2004-0860, pp. 131-136; 6 pages
Published Online:
December 11, 2008
Citation
Wang, D, Wang, M, Reader, GT, & Zheng, M. "A Numerical Study on Uncontrolled Regeneration Processes in Diesel Particulate Filters." Proceedings of the ASME 2004 Internal Combustion Engine Division Fall Technical Conference. ASME 2004 Internal Combustion Engine Division Fall Technical Conference. Long Beach, California, USA. October 24–27, 2004. pp. 131-136. ASME. https://doi.org/10.1115/ICEF2004-0860
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