孔道结构对GPF工作特性的影响分析

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中图分类号：TK413 文献标识码：A 文章编号：2095-2953（2026）01-0079-08

Abstract：In thispaper，a three -- dimensional simulation model of gasoline particulate filter（GPF）was established based on AVL-Fire software，and the influenceof support structure parameters such as cell density，wallthickness and asymmetric cellsize ratioon GPF pressure dropandcapture eficiency was systematically studied.The pressure drop characteristicsand trapping eficiencyof GPFunder diferent structural parameters were analyzed by combining numerical simulation and experimental verification. The results show that increasing the cell density（ 100～300 CPSI） can significantly reduce the pressure drop （by up to 50.6% ），and slightly improve the capture efficiency. The increase in wall thickness （ 0.10～0.30mm ）leads to a linear increase in pressure drop （an increase of 40.7% ）， but it can improve the capture efficiency. The increase in the asymmetric cell size ratio （1.0～1.4） can reduce the pressure drop （17.2%） ），but the capture efficiency decreases slightly （ from99.45% to 98.72% ）．Therefore，the effct of reducing GPF pressure drop can be achieved byappropriately increasing the celldensity，reducing the wall thickness and increasing thecell sizeratio；increasing the cell density，increasing the wallthicknessand decreasing the cell size ratio within a reasonable range can help improve the GPF capture eficiency.

Key words：gasoline particulate filter;cell density；wall thickness；cell size ratio；pressure drop；capture efficincy

汽油机凭借优异的动力性能与出色的燃油经济性优势，深受市场青睐[1]，其市场占有率呈现持续增长的态势[2]。（剩余9038字）