This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Mid-Channel Ash Plug on DPF Pressure Drop
Technical Paper
2016-01-0966
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
It has been observed that a certain percentage of diesel particulate filters (DPFs) from the field form mid-channel ash plugs both in light duty and heavy duty applications. As revealed in a post mortem study, some field samples have ash plugs of 3-10 cm length in the middle of DPF inlet channels, which can potentially reduce the inlet channel volume by more than 50%. As a result, the mid-channel ash plug reduces the effective filtration area and decreases the effective channel open width in the middle of the channel. This explains why these filters are reported as having large increases in pressure drop. Moreover, the mid-channel ash deposits reduce the DPF service life and render the filter cleaning process ineffective.
In the present study, an open source CFD tool is applied to study the 3D flow crossing two representative inlet and outlet DPF channels where the inlet channels have mid-channel ash plugs. A systematic grid convergence study is conducted to ensure that the CFD results are grid independent. A heavy duty DPF is investigated and the mid-channel ash plug is assumed to be 6.8 cm long. Several cases ranging from 50% to 80% channel open width reduction are discussed. The simulations show that mid-channel plug can increase the DPF pressure by 30% to 80%. Meanwhile, the mid-channel deposits change the pressure and wall velocity distribution along the DPF length direction. In addition, an algorithm is introduced to calculate the entire DPF pressure drop when it has multiple types of mid-channel plugs. This paper presents a theoretical means to predict mid-channel ash plug effects on DPF pressure drop.
Recommended Content
Citation
Wang, Y. and Kamp, C., "The Effects of Mid-Channel Ash Plug on DPF Pressure Drop," SAE Technical Paper 2016-01-0966, 2016, https://doi.org/10.4271/2016-01-0966.Also In
References
- International Agency for Research on Cancer (IARC) 2012 Diesel engine exhaust carcinogenic, media release, IARC and World Health Organization (WHO) Lyon, France
- Brito , J. M. Acute Cardiovascular and inflammatory toxicity induced by inhalation of diesel and biodiesel exhaust particles Toxicological sciences 116 1 67 78
- DieselNet Technology Guide https://www.dieselnet.com/tech/emi_intro.php
- Dittler , A. Ash Transport in Diesel Particle Filters SAE Technical Paper 2012-01-1732 2012 10.4271/2012-01-1732
- Ishizawa , T. , Yamane , H. , Satoh , H. , Sekiguchi , K. et al. Investigation into Ash Loading and Its Relationship to DPF Regeneration Method SAE Int. J. Commer. Veh. 2 2 164 175 2010 10.4271/2009-01-2882
- Fukui , R. , Okamoto , Y. , Nakao , M. Experimental Analysis of Sudden Pressure Increase Phenomenon by Real-Time Internal Observation of Diesel Particulate Filter, The American Society of Mechanical Engineers Internal Combustion Engine Division Technical Article ICEF2015-1038
- Koltsakis G , Onoufrios H , Depcik C et al. Catalyzed diesel particulate filter modeling Reviews in Chemical Engineering 2013 29 1 61
- 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
- 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
- Wangard , W. , Egelja , A. , and Metwally , H. CFD Simulations of Transient Soot Trapping and Regeneration in a Diesel Particulate Filter SAE Technical Paper 2004-01-2658 2004 10.4271/2004-01-2658
- Yi , Y. Simulating the Soot Loading in Wall-flow DPF Using a Three-Dimensional Macroscopic Model SAE Technical Paper 2006-01-0264 2006 10.4271/2006-01-0264
- Hashimoto , S. , Miyairi , Y. , Hamanaka , T. , Matsubara , R. et al. SiC and Cordierite Diesel Particulate Filters Designed for Low Pressure Drop and Catalyzed, Uncatalyzed Systems SAE Technical Paper 2002-01-0322 2002 10.4271/2002-01-0322
- Masoudi , M. , Heibel , A. , and Then , P. Predicting Pressure Drop of Wall-Flow Diesel Particulate Filters - Theory and Experiment SAE Technical Paper 2000-01-0184 2000 10.4271/2000-01-0184
- Wang , 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 10.4271/2013-01-1584
- Sappok , A. PhD Thesis Massachusetts Institute of Technology 2009
- 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
- Roache , P.J. , Ghia K. , White F. Editorial Policy Statement on the Control of Numerical Accuracy ASME Journal of Fluids Engineering 108 1 March 1986 2
- Roache , P.J. Procedure for Estimation and Reporting of Uncertainty Due to Discretization in CFD Applications Journal of Fluids Engineering 130 7 078001 2008
- Sappok , A. , Govani , I. , Kamp , C. , Wang , Y. et al. In-Situ Optical Analysis of Ash Formation and Transport in Diesel Particulate Filters During Active and Passive DPF Regeneration Processes SAE Int. J. Fuels Lubr. 6 2 336 349 2013 10.4271/2013-01-0519
- Kim , K. , Mital , R. , Higuchi , T. , Chan , S. et al. An Investigative Study of Sudden Pressure Increase Phenomenon Across the DPF SAE Technical Paper 2014-01-1516 2014 10.4271/2014-01-1516