PARTICULATE DEPOSITION MODELING IN DIESEL FILTER

摘要

The objective of this work is to evaluate the possibility of extracting information about the filter loading status from the running history of the engine and to assess the interaction between spatial deposition of soot inside the porous wall and the engine operating conditions. The attention is drawn to the non-uniform particles distribution on the channels which may compromise the filter safety as during the thermal regeneration process, the evolution of particulate oxidation results in temperature differences in the soot layer and critical overheating phenomena may originate. CFD simulations are performed by means of a multi dimensional approach in which a two-step stationary calculation is used to simulate the soot loading; results concerning the correlation between the engine operative conditions and the deposition of particulate are presented.