Browse Publications Technical Papers 2007-01-0045
2007-01-23

One Dimensional Backpressure Model for Asymmetrical Cells DPF 2007-01-0045

The development of the Diesel Particulate Filter (DPF) cell geometry and DPF size for new applications requires specific tools to predict the pressure drop as a function of filter characteristics, mass flow and filter loading. A 1-D permeability model is most useful for this type of work.
This paper presents the development of a 1-D physical model of DPF permeability. This model includes the symmetric and asymmetric channel shape and is able to simulate various functional phases of the DPF through its lifetime: with or without soot and with or without ash.
This kind of model needs several physical coefficients, in order to describe the flow behavior. This work explains the determination of the physical coefficients of the 1-D model. The large disparity of the literature is shown. Therefore, it is necessary to carefully determine these coefficients. Several methods were used for each functional phase of the DPF life:
  • 1-D model and experimental measurements identification
  • 3-D model
  • Specific prototypes
Various methods have shown a good correlation.
The 1-D model and the physical validation were made by comparing numerical and experimental results for a different asymmetrical geometry DPF that was not used for the 1-D model establishment. This comparison is performed with and without soot and with and without synthetic ash.
The main result of the work consists in demonstrating the existence of a non-linear permeability coefficient for the soot layer.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Flow Uniformity Optimization for Diesel Aftertreatment Systems

2006-01-1092

View Details

TECHNICAL PAPER

Measurement of Soot Mass and Pressure Drop Using a Single Channel DPF to Determine Soot Permeability and Density in the Wall Flow Filter

2007-01-0311

View Details

TECHNICAL PAPER

Modeling of the Catalyzed Continuously Regenerating Diesel Particulate Filter (CCR-DPF) System: Model Development and Passive Regeneration Studies

2007-01-0043

View Details

X