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Prediction of Pressure Drop in Diesel Particulate Filters Considering Ash Deposit and Partial Regenerations
Technical Paper
2004-01-0158
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Published investigations on the calculation of pressure drop of diesel particulate filters consider the contribution of substrate, soot, channel flow and inertial effects at the inlet and outlet of the channels. The model presented in this work considers further contributions as the oil ash and additive ash and their effects on the DPF pressure drop. It is shown that different types of ash deposit which are caused by different driving cycles and different regeneration modes, will result in a significantly different pressure drop even at the same total amount of ash. It will be shown that in the case without soot load the ash deposit at the wall will result in a higher pressure drop than the same amount of ash being deposited at the rear end of the channels. It is also shown that at a higher soot load this behaviour will be inverted. In addition this work considers a variable permeability of the soot layer varying with the soot load of the filter. Using the model described the effects of different ash distributions on the pressure drop are discussed. In a further point it is shown how the ash distribution affects the optimum filter design.
A further feature of the model is the calculation of the pressure drop of partially regenerated filters. It is shown that a local regeneration even in a small part of the filter will result in significant reduction in pressure drop.
In a further extension the pressure drop model is linked to CFD calculation data. The resulting system of equations is integrated over time. This allows the calculation of the evolution of soot and ash distribution over the cross section of the particulate filter.
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Citation
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, https://doi.org/10.4271/2004-01-0158.Also In
Diesel Emissions on CD-ROM from the SAE 2004 World Congress
Number: SP-1835CD; Published: 2004-03-08
Number: SP-1835CD; Published: 2004-03-08
References
- Konstandopoulos, A.G. Johnson, J.H. Wall flow diesel particulate filters - their pressure drop and collection efficiency SAE 890405
- Konstandopoulos, A.G. Skaperdas, E. Warren, J. Allanson, R. Optimzed filter design and selection criteria for continueously regenerating diesel particulate traps SAE 1999-01-0468
- Konstandopoulos, A. Kostoglou, M. Skaperdas, E. Papaioannou, E. Zarvalis, D. Kladopoulou, E. Fundamental Studies of Diesel Particulate Filters: Transient Loading, Regeneration and Aging SAE 2000-01-1016
- Konstandopoulos, A. Skaperdas, E. Masoudi, M. Inertial contributions to the pressure drop of diesel particulate filters SAE 2001-01-0909
- Opris, C.N. Johnson, J.H. A 2-D computational model describing the flow and filtration characteristics of a ceramic diesel particulate trap SAE 980545
- Springer Verlag Berlin 2003
- Flörchinger, P. Ebner, S.
- Konstandopoulos, A.G. Skaperdas, E. Masoudi, M. Microstructural properties of soot deposits in diesel particulate traps SAE 2002-01-1015
- Majewski, A. DieselNet www.dieselnet.com
- Mucha, P Gaiser, G. Soot layer development and regeneration in diesel particulate filters under transient conditions and different driving cycles
- Gaiser, G. Oesterle; J. Braun, J. Zacke, P. The progressive spin inlet - homogeneous flow distributions under stringent conditions SAE 2003-01-0840
- Oesterle, J. Gaiser, G. Zacke, P. Homogeneous Loading and Regeneration of Diesel Particulate Filters using Progressive Spin Elements SAE 2004-01-1424
- Piesche, M. Bargende, M. Deuschle, T. Hitzler, G. Janoske, U. Weitk, W. 2003 2003
- Gege, I. Typical damage phenomena of particulate filters Minimierung der Partikelemissionen aus Verbrennungsmotoren Haus der Technik München 2003