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학술저널
저자정보
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한국자동차공학회 International journal of automotive technology International journal of automotive technology Vol.8 No.2
발행연도
2007.4
수록면
165 - 177 (13page)

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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 convectivediffusive particle transportation is examined. Sensitivity analysis was conducted on model parameters, relevant to themode 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 ㎏/㎥, 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.

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ABSTRACT
1. INTRODUCTION
2. PRESSURE DROP MODEL
3. SINGLE CHANNEL DPF EXPERIMENTS
4. INVERSE-ANALYSIS FOR MODEL PARAMETERS
5. PM LOADING CHARACTERISTICS
6. SENSITIVITIES OF FILTRATION PARAMETERS TO MODE TRANSITION
7. CONCLUSIONS
ACKNOWLEDGEMENT
REFERENCES

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