Study on a New Gasoline Particulate Filter Structure Based on the Nested Cylinder and Diversion Channel Plug

Mingfei Mu, Xinghu Li, Yong Qiu and Yang Shi
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Mingfei Mu: School of Transportation Science and Engineering, Beihang University, Beijing 100083, China
Xinghu Li: School of Transportation Science and Engineering, Beihang University, Beijing 100083, China
Yong Qiu: Propulsion System Department, Pan Asia Technical Automotive Center Co., Ltd., Shanghai 201201, China
Yang Shi: College of Mathematics & Statistics, Hebei University of Economics and Business, Shijiazhuang 050061, China

Energies, 2019, vol. 12, issue 11, 1-19

Abstract: Increasingly stringent emission regulations have imposed strict requirements on the particulate matter (PM) from gasoline direct injection (GDI) engines, and the gasoline particulate filters (GPFs) are considered one of the most promising devices for meeting these requirement. To reduce the flow resistance of the GPF, a type of nested cylinder and diversion channel plug (NC-DCP) GPF is designed. It is composed of nested foam metal cylinders and annular diversion channel plugs. The pressure drop and its influencing factors were theoretically studied. The results show that the structural parameters, such as the cylindrical layer spacing and the length-to-diameter ratio, and the pressure drop have trade-off relationships. Moreover, the filtration efficiency is analyzed, and the calculation formula is summarized. The internal flow field distribution and its influencing factors are discussed based on a 2-D axisymmetric simulation. The results show that the exhaust velocity affects the flow field uniformity but does not affect the flow field structure. The pressure drop gradually decreases as the number of nested layers increases, and the positive direction is beneficial to reduce the overall pressure drop. Under different velocities, there is an optimal length-to-diameter ratio to minimize the pressure drop, and the simicircular diversion plug greatly improves the flow uniformity index for the internal flow field of the filter element.

Keywords: foam metal; filter element; nested cylinder layer number; diversion channel plug cross section; pressure drop; flow field uniformity index (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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