International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
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DETAILED EXAMINATION OF INVERSE-ANALYSIS PARAMETERS FOR PARTICLE TRAPPING IN SINGLE CHANNEL DIESEL PARTICULATE FILTER

  • Jung, S.C. (The Graduate School, Department of Mechanical Engineering, Yonsei University) ;
  • Park, J.S. (The Graduate School, Department of Mechanical Engineering, Yonsei University) ;
  • Yoon, W.S. (Department of Mechanical Engineering, Yonsei University)
  • Published : 2007.04.30
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Abstract

Predictions of diesel particulate filtration are typically made by modeling of a particle collection, and providing particle trapping levels in terms of a pressure drop. In the present study, a series of single channel diesel particulate filter (DPF) experiments are conducted, the pressure traces are inversely analyzed and essential filtration parameters are deducted for model closure. A DPF filtration model is formulated with a non-linear description of soot cake regression. Dependence of soot cake porosity, packing density, permeability, and soot density in filter walls on convective-diffusive particle transportation is examined. Sensitivity analysis was conducted on model parameters, relevant to the mode of transition. Soot cake porosity and soot packing density show low degrees of dispersion with respect to the Peclet number and have asymptotes at 0.97 and $70\;kg/m^3$, respectively, at high Peclet number. Soot density in the filter wall, which is inversely proportional to filter wall Peclet number, controls the filtration mode transition but exerts no influence on termination pressure drop. The percolation constant greatly alters the extent of pressure drop, but is insensitive to volumetric flow rate or temperature of exhaust gas at fixed operation mode.

Keywords

References

  1. Bissett, E. J. (1984). Mathematical model of the thermal regeneration of a wall-flow monolith diesel particulate filter. Chemical Engineering Science, 39, 1233-1244 https://doi.org/10.1016/0009-2509(84)85084-8
  2. Harvey, G. D., Baumgard, K. J., Johnson, J. H., Gratz, L. D., Bagley, S. T. and Leddy, D. G. (1994). Effects of a ceramic particle trap and copper fuel additive on heavy-duty diesel emissions. SAE Paper No. 942068
  3. Hinds, W. C. (1999). Aerosol Technology: Properties, Behavior and Measurement of Airborne Particles. 2nd edn. John Wiley & Sons. New York
  4. Huynh, C. T., Johnson, J. H., Yang, S. L., Bagley, S. T., and Warner, J. R. (2003). A one-dimensional computational model for studying the filtration and regeneration characteristics of a catalyzed wall-flow diesel particulate filter. SAE Paper No. 2003-01-0841
  5. Kladopoulou, E. A., Yang, S. L., Johnson, J. H., Parker, G. G., and Konstandopoulos, A. G. (2003). A study describing the performance of diesel particulate filters during loading and regeneration-A lumped parameter model for control application. SAE Paper No. 2003-01-0842
  6. Konstandopoulos, A. G. and Johnson, J. H. (1989). Wallflow diesel particulate filters-Their pressure drop and collection efficiency. SAE Paper No. 890405
  7. Konstandopoulos, A. G., Kostoglou, M., Skaperdas, E., Papaioannou, E., Zarvalis, D. and Kladopoulou, E. A., (2000). Fundamental studies of diesel particulate filter: Transient loading, regeneration and aging. SAE Paper No. 2000-01-1016
  8. Konstandopoulos, A. G., Skaperdas, E. and Masoudi, M. (2001). Inertial contributions to the pressure drop of diesel particulate filters. SAE Paper No. 2001-01-0909
  9. Konstandopoulos, A. G., Skaperdas, E. and Masoudi, M. (2002). Microstructural properties of soot deposits in diesel particulate traps. SAE Paper No. 2002-01-1015
  10. Konstandopoulos, A. G. (2003). Flow resistance descriptors for diesel particulate filters: Definitions, measurements and testing. SAE Paper No. 2003-01-0846
  11. Konstandopoulos, A. G., Kostoglou, M., Vlachos, N. and Kladopoulos, E., (2005). Progress in diesel particulate filter simulation. SAE Paper No. 2005-01-0946
  12. Lee, K. W., Reed, L. D. and Gieseke, J. A. (1978). Pressure drop across packed beds in the low Knudsen number regime. J. Aerosol Sci., 9, 557-565 https://doi.org/10.1016/0021-8502(78)90021-6
  13. Liu, Z. G., Verdegan, B. M., Badeau, K. M. A. and Sonsalla, T. P. (2002). Measuring the fractional efficiency of diesel particulate filters. SAE Paper No. 2002-01-1007
  14. Liu, Z. G., Skemp, M. D. and Lincoln, J. C. (2003). Diesel particulate filters: Trends and implications of particle size distribution measurement. SAE Paper No. 2003-01-0046
  15. Mayer, A., Czerwinski, J. and Scheidegger, P. (1996). Trapping efficiency depending on particulate size. SAE Paper No. 960472
  16. Opris, C. N. and Johnson, J. H. (1998). A 2-D computational model describing the flow and filtration characteristics of a ceramic diesel particulate trap. SAE Paper No. 980545
  17. Opris, C. N. and Johnson, J. H. (1998). A 2-D computational model describing the heat transfer, reaction kinetics and regeneration characteristics of a ceramic diesel particulate trap. SAE Paper No. 980546
  18. Park, J. S. (2005). A Study on the Relation between PM Loading and Pressure Drop Using Single Channel DPF. M. S. Thesis. Yonsei University. Seoul. Korea
  19. Park, J. S., Yoon, C. S, Lee, H. S. and Chun, K. M. (2005). A study on the relation between PM loading and pressure drop using single channel DPF. Spring Conf. Proc., The Korean Society of Automotive Engineers, 247-252
  20. Press, W. H., Teukolsky, S. A., Vetterling, W. T. and Flannery, B. P. (1992). Numerical Recipes. The Art of Scientific Computing. 2nd edn. Cambridge University Press. Cambridge
  21. Shende, A. S., Johnson, J. H., Yang, S. L., Bagley, S. T., and Thalagavara, A. M. (2005). The filtration and particulate matter oxidation characteristics of a catalyzed wall-flow diesel particulate filter: Experimental and 1-D 2-layer model results. SAE Paper No. 2005-01-0949
  22. Sorenson, S. C., Hoj, J. W. and Stobbe, P. (1994). Flow characteristics of SiC diesel particulate filter materials. SAE Paper No. 940236
  23. Tassopoulos, M. (1991). Relationships between Particle Deposition Mechanism, Deposition Microstructure and Effective Transport Properties. Ph.D. Dissertation. Yale University. USA