The optimization and design of DPF channel structure parameter was carried out to reduce the flow resistance. GTPower was used to establish DPF simulation model which was applied to study the influence of the asymmetrical channel side length ratio, cell density and filter wall thickness on DPF pressure drop performance and collection efficiency during the particle collection process. Then DPF channel structure parameter was further optimized with quadratic programming algorithm according to the above mentioned design parameters and the collection efficiency constraint. The study results show that the asymmetric channel structure that the channel side length of inlet is larger than that of outlet can decrease the pressure drop during the collection process of particle cake layer, but decreases the collection efficiency of DPF. The increase of cell density can decrease the pressure drop in a certain range and increase the collection efficiency. The decrease of filter wall thickness can decrease the pressure drop, but the collection efficiency also decreases. Accordingly, when the ratio of inlet and outlet channel side length is 1.024 8, the cell density is 400 cpsi, and the filter wall thickness is 0.333 mm, the pressure drop of DPF decreases by more than 26% and the particulate collection efficiency keeps higher than 98%.
PENG Meichun
,
LIN Junyan
,
XIE Huanning
,
LI Jilong
. Optimal and Design of DPF Channel Structure Parameters[J]. Vehicle Engine, 2019
, 0(1)
: 41
-46
.
DOI: 10.3969/j.issn.1001-2222.2019.01.007
