The objective of this study is to study the soot layer density and permeability in wall-flow diesel particulate filters. Knowledge of the soot morphology as function of the operating conditions is important for the design and on-board control of Diesel Particulate Filters (DPFs).The experimental set-up relies on a specially designed soot loading procedure on single-channel cordierite filters. The experimental conditions simulate real-world as close as possible regarding the filtration velocity, temperature and soot quality, since the sampling is done in real exhaust. By cutting, weighing and imaging the single channel filters it is possible to measure with accuracy the soot layer thickness as deposited under different operating conditions. Combined with pressure drop measurements and modeling, it is further possible to evaluate the soot layer permeability.The density values obtained ranged between 25 and 100 kg/m3 and were found to depend on flow velocity, pressure drop and soot loading. In order to de-couple the above effects on soot morphology, an intra-layer model able to account for locally variable soot properties and soot compressibility was developed. After calibration of the main parameters based on the single channel results, the model was integrated in a previously developed full-scale DPF model and validated under transient soot compression testing.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Measurement and Intra-Layer Modeling of Soot Density and Permeability in Wall-flow Filters


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2006 World Congress & Exhibition ; 2006



    Publication date :

    2006-04-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Measurement and intra-layer modeling of soot density and permeability on wall-flow filters

    Koltsakis,G.C. / Konstantinou,A. / Haralampous,O.A. et al. | Automotive engineering | 2006


    The optimum cell density for wall-flow monolithic filters: effects of filter permeability, soot cake structure and ash loading

    Konstandopoulos,A.G. / Kladopoulou,E. / CERTH/CPERI,GR | Automotive engineering | 2004