Abstract
An integrated DPF filtration model is proposed to study the properties of soot filtration and pressure drop, which includes deep bed filtration model, cake filtration model and pressure drop model. Research results show that the evolution of filtration can be divided into two stages named as deep bed filtration and cake filtration respectively. During deep bed filtration, soot is trapped in the filter wall, which results a rapid pressure drop gradient of 7.6 Pa/s. However, the soot quality only accounts for 1.6% of the total in whole filtration process. Compact soot layer is developed during soot filtration. And a linear increase of pressure drop with the gradient of 1.4 Pa/s during the stage. Besides, the pressure drop caused by the soot layer and cake layer are 54 and 38% respectively in the whole simulation duration.
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