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Effects of structural parameters on trapping characteristics of diesel particulate filter |
School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract A model of diesel particulate filter(DPF) was established to simulate inside and in expansion tube area gas flow and particulate trapping process with different diameter ratios and CPSI. The effects of diameter ratio on the gas flow at axial and radial directions and particulate distribution were investigated. The influence of channel density on fluid flow and trapping efficiency in DPF was also investigated. The results show that proper decrease of diameter ratio can improve flow uniformity and decrease particle cluster in central axis, which is beneficial to reduce the load in the central axis of DPF. The flow fluctuation in the expansion tube area is reduced for small diameter ratio, which is good for the flow and particulate to enter into DPF and improve the collection efficiency. Increasing CPSI can increase flow resistance in DPF and affect flow uniformity, which is beneficial to improve collection efficiency.
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Received: 26 January 2016
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