Abstract:

Based on the pyrogenation regeneration model for a channel of diesel particulate filter , the distribution laws of soot combustion and wall temperature in the axial direction during the pyrogenation regeneration process , as well as the effect of regeneration condition on pyrogenation regeneration process , are investigated by numerical simulation. The results indicate that the wall temperature gradually increase from the front-end to the rear-end of the monolith , with a maximum value at the rear-end; and that , with the increase in the initial temperature of the monolith and with the appropriate increase in the gas mass flux , the gas oxygen content and the soot deposit mass , the regeneration process can be effectively speeded up. However , too much oxygen and soot deposit willlead to a much higher wall temperature , and a much larger gas mass flux may slow down the regeneration process.

Key words: diesel, particulate filter, pyrogenation regeneration, regeneration condition, numerical simulation