Understanding of the Internal Crack Phenomenon Inside Diesel Particulate Filter During Regeneration - Part 1: Modeling and Experiments

摘要

This study deals with a coupled experimental and modeling approach of diesel particulate filter cracking. A coupled model (heat transfer, mass transfer, chemical reactions) is used to predict the temperature field inside the filter during the regeneration steps. This model consists of assembled 1D models and is calibrated using a set of laboratory bench tests. In this set of experiments, laboratory scale filters are tested in different conditions (variation of the oxygen rate and gas flow) and axial/radial thermal gradient are recorded with the use of thermocouples. This model is used to build a second set of laboratory bench tests, which is dedicated to the understanding of the phenomena of diesel particulate filter cracking.