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The Sensitivity of DPF Performance to the Spatial Distribution of Ash Inside DPF Inlet Channels
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 08, 2013 by SAE International in United States
Annotation ability available
Ash inside a honeycomb-configured diesel particulate filter (DPF) inlet channel accumulates both as a cake layer along the channel walls and as a “plug” towards the back of the channel. Experimental studies of DPF ash distribution have shown both an axial variation of deposits along channels and accumulation towards the end plugs. This study evaluates the sensitivity of DPF pressure drop on ash axial distribution and the potential to reduce flow restrictions by controlling and optimizing the spatial distribution of ash inside DPF channels.
A computational model has been used in conjunction with experimental data to illustrate the sensitivity of ash spatial distribution on DPF performance. The classical constant-thickness DPF one-dimensional models have substantially been updated to include layer thickness axial variations.
Material properties, such as ash characteristics, are provided by recent experiments at the authors' laboratory. The experiments tested six types of lubricant formulations with different additives and determined their effects on DPF performance. By analyzing the DPF pressure-drop variations with ash loading, the ash cake-layer permeability and the substrate wall permeability can be estimated using the information contained in the DPF pressure drop data. With these experimental ash properties data, simulations are conducted to study the ash distribution effects.
The simulation results show that DPF pressure drop is not very sensitive to the specific shape of the cake-layer profile along the filter channel. However, accumulating ash along the channel walls versus accumulating ash at the end plug does make noticeable differences. Hence detailed dimensional analyses have been conducted to illustrate the subtle effects of the controlling physical parameters.
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CitationWang, Y., Wong, V., Sappok, A., and Munnis, S., "The Sensitivity of DPF Performance to the Spatial Distribution of Ash Inside DPF Inlet Channels," SAE Technical Paper 2013-01-1584, 2013, https://doi.org/10.4271/2013-01-1584.
- Sappok , A. and Wong , V. Ash Effects on Diesel Particulate Filter Pressure Drop Sensitivity to Soot and Implications for Regeneration Frequency and DPF Control SAE Int. J. Fuels Lubr. 3 1 380 396 2010 10.4271/2010-01-0811
- Bissett , E. J. Mathematical Model of the Thermal Regeneration of a Wall-Flow Monolith Diesel Particulate Filter Chemical Engineering Science 39 1233 1244 1984
- Konstandopoulos , A. , Skaperdas , E. , Warren , J. , and Allansson , R. Optimized Filter Design and Selection Criteria for Continuously Regenerating Diesel Particulate Traps SAE Technical Paper 1999-01-0468 1999 10.4271/1999-01-0468
- Opris , C. and Johnson , J. A 2-D Computational Model Describing the Flow and Filtration Characteristics of a Ceramic Diesel Particulate Trap SAE Technical Paper 980545 1998 10.4271/980545
- Gaiser , G. and Mucha , P. Prediction of Pressure Drop in Diesel Particulate Filters Considering Ash Deposit and Partial Regenerations SAE Technical Paper 2004-01-0158 2004 10.4271/2004-01-0158
- Konstandopoulos , A. , Skaperdas , E. , and Masoudi , M. Inertial Contributions to the Pressure Drop of Diesel Particulate Filters SAE Technical Paper 2001-01-0909 2001 10.4271/2001-01-0909
- Sappok , A. , Rodriguez , R. , and Wong , V. Characteristics and Effects of Lubricant Additive Chemistry on Ash Properties Impacting Diesel Particulate Filter Service Life SAE Int. J. Fuels Lubr. 3 1 705 722 2010 10.4271/2010-01-1213
- Sappok , A. , Munnis , S. , and Wong , V. Individual and Synergistic Effects of Lubricant Additive Components on Diesel Particulate Filter Ash Accumulation and Performance ASME ICES2012-81237 2012
- Dullien F. A. L. Porous Media Academic Press Inc. San Diego 1979
- Ogyu , K. , Ohno , K. , Hong , S. , and Komori , T. Ash Storage Capacity Enhancement of Diesel Particulate Filter SAE Technical Paper 2004-01-0949 2004 10.4271/2004-01-0949