Browse Publications Technical Papers 2006-01-3011
2006-09-14

1D Modeling of the Hydrodynamics and of the Regeneration Mechanism in Continuous Regenerating Traps 2006-01-3011

The present work focuses on the simulation of the hydrodynamics, transient filtration/loading and catalytic/NO2-assisted regeneration of Diesel after-treatment systems. A 1D unsteady model for compressible and reacting flows for the numerical simulation of the behavior of Diesel Oxidation Catalysts (DOCs) and Diesel Particulate Filters (DPFs) has been developed. The numerical model is able to keep track of the amount of soot in the flow; the increasing of back-pressure through the exhaust system (mainly due to the Diesel Particulate Filter) can be predicted by the calculation of the permeability variation of the porous wall, as the soot particles goes inside the DPF. A sub-model for the regeneration of the collected soot has been developed: the collected particulate is oxidized by the Oxygen (O2) and by the Nitrogen Dioxide (NO2). The new approach allows to study the devices' behavior under unsteady state operating conditions, when the thermo-fluid dynamic characteristics of the pulsating flow induced by the cylinders are imposed at the inlet section of the exhaust system. The after-treatment system of a 1.9L JTD FIAT turbocharged diesel engine has been modeled. The numerical code has been calibrated and validated by an extensive set of experimental data (filter pressure drop, exhaust temperatures, exhaust mass flow rate and gaseous emissions) provided by Elasis: data were referred to steady state experiments, which covered a wide range of operating conditions. Deposition and regeneration (both thermal and fuel-additive) were predicted satisfactorily.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 18% 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

Low Pressure EGR Calibration Strategies for Reliable Diesel Particulate Filter Regeneration on HDD Engines

2002-01-2780

View Details

TECHNICAL PAPER

Experimental Testing of a Low Temperature Regenerating Catalytic DPF at the Exhaust of a Light-Duty Diesel Engine

2018-01-0351

View Details

TECHNICAL PAPER

Porous Silicon Nitride Ceramics with High Performance for Diesel Exhaust After-Treatment System

2012-01-0849

View Details

X