Article(id=1324806269709726113, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1324806227083002341, articleNumber=null, orderNo=null, doi=10.16236/j.cnki.nrjxb.202506054, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736870400000, receivedDateStr=2025-01-15, revisedDate=1745251200000, revisedDateStr=2025-04-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1793788028409, onlineDateStr=2026-11-04, pubDate=1764000000000, pubDateStr=2025-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793788028409, onlineIssueDateStr=2026-11-04, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793788028409, creator=13701087609, updateTime=1793788028409, updator=13701087609, issue=Issue{id=1324806227083002341, tenantId=1146029695717560320, journalId=1205116786560364546, year='2025', volume='43', issue='6', pageStart='481', pageEnd='568', issueExtLink='null', onlineDate='null', pubDate='1764000000000', pubDateStr='2025-11-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1793788018246, creator='13701087609', updateTime=1793959617886, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1325525968575812368, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1324806227083002341, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1325525968575812369, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1324806227083002341, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=481, endPage=489, ext={EN=ArticleExt(id=1324806271601357218, articleId=1324806269709726113, tenantId=1146029695717560320, journalId=1205116786560364546, language=EN, title=Numerical simulation of filtration performance and mechanism of gasoline particulate filter, columnId=null, journalTitle=Transactions of CSICE, columnName=null, runingTitle=null, highlight=null, articleAbstract=
A dynamic filtration model of the gasoline particulate filter(GPF) was developed,considering both pore and wall scales,with the addition of radial porosity heterogeneity in the porous media. The impact of internal structural changes in the GPF on particle filtration performance was investigated from the perspectives of filtration mechanisms and microscopic size. It is found that the primary filtration mechanisms in the GPF are Brownian diffusion and interception,which correspond to the filtration of small particles(<30nm) and large particles(>200nm),respectively. When the mean pore size in the GPF decreases or the pore size variance increases,the proportion of collectors with diameters smaller than 10μm increases. This results in a higher number of collectors achieving more than 50% filtration efficiency for particles in the range of 10—300nm,thereby enhancing the total filtration efficiency of the GPF. After 20minutes of particle filtration,the filtration efficiency of GPF increases and the particles adhere to the area of the lowest porosity,where the porosity reduces. However,the efficiency of Brownian diffusion and interception slightly decreases,indicating that porosity plays a dominant role in influencing filtration efficiency during the dynamic filtration process.
, authors=Yuxin Hu
1, Fan Zhang
1, Dongxia Yang
2, Wenzheng Xia
2, Xinbo Yuan
2, Qiang Ren
3, authorsList=Yuxin Hu, Fan Zhang, Dongxia Yang, Wenzheng Xia, Xinbo Yuan, Qiang Ren, authorCompany=null, correspAuthors=Fan Zhang, Dongxia Yang, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1324806276399641015, articleId=1324806269709726113, tenantId=1146029695717560320, journalId=1205116786560364546, language=CN, title=GPF捕集性能及机理的数值模拟, columnId=null, journalTitle=内燃机学报, columnName=, runingTitle=null, highlight=null, articleAbstract=
从孔隙、壁面两个维度,搭建汽油机颗粒捕集器(GPF)的动态捕集模型,考虑了多孔介质孔隙率径向不均匀,从捕集机制和微观尺寸的角度研究GPF内部结构变化对颗粒捕集性能的影响.结果表明:GPF的捕集机制主要是布朗扩散和拦截捕集,分别对应小粒径(<30nm)和大粒径(>200nm)的颗粒物捕集.当GPF中平均孔径减小或孔径方差增加,直径小于10μm收集器的比例增加,使得更多收集器对10~300nm范围颗粒物的捕集效率为50%以上,进而导致GPF总捕集效率增加.经过20min颗粒捕集,GPF捕集效率不断增大,颗粒物主要附着在孔隙率最低处,进一步降低孔隙率,但此时布朗扩散和拦截捕集效率略有降低,因而动态捕集过程中捕集效率主要受孔隙率影响.
, authors=胡雨馨
1, 张帆
1, 杨冬霞
2, 夏文正
2, 袁新波
2, 任强
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Schematic of multi-scale filtration model, figureFileSmall=yMOafOOKZtbbmtnzlWvl0Q==, figureFileBig=iDTQaz5/jgGuMTsw+VxPmw==, tableContent=null), ArticleFig(id=1325514538086433659, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图1, caption=
多尺度捕集模型示意, figureFileSmall=yMOafOOKZtbbmtnzlWvl0Q==, figureFileBig=iDTQaz5/jgGuMTsw+VxPmw==, tableContent=null), ArticleFig(id=1325514539827069820, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.2, caption=
Results of model validation, figureFileSmall=/jry2ihy5BLgo/4i/LTylw==, figureFileBig=+Fqz8uDkaTSTmPgP6pR+uQ==, tableContent=null), ArticleFig(id=1325514539915150205, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图2, caption=
模型验证结果, figureFileSmall=/jry2ihy5BLgo/4i/LTylw==, figureFileBig=+Fqz8uDkaTSTmPgP6pR+uQ==, tableContent=null), ArticleFig(id=1325514539978064766, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.3, caption=
Total filtration efficiency and the efficiency of each filtration mechanism, figureFileSmall=nvYrd87KDx6y+sDdlFDYKA==, figureFileBig=n3+SQuBy2uLbdHRfyX5nQQ==, tableContent=null), ArticleFig(id=1325514540082922367, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图3, caption=
总捕集效率及各捕集机制效率, figureFileSmall=nvYrd87KDx6y+sDdlFDYKA==, figureFileBig=n3+SQuBy2uLbdHRfyX5nQQ==, tableContent=null), ArticleFig(id=1325514540191974272, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.4, caption=
PDF corresponding to different mean pore sizes and pore size variances, figureFileSmall=xYlL1MBB9kzqQu3gMXNUOA==, figureFileBig=px5LfIFYa03LhgEMAzcB/w==, tableContent=null), ArticleFig(id=1325514540288443265, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图4, caption=
不同平均孔径和孔径方差对应的PDF, figureFileSmall=xYlL1MBB9kzqQu3gMXNUOA==, figureFileBig=px5LfIFYa03LhgEMAzcB/w==, tableContent=null), ArticleFig(id=1325514540363940738, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.5, caption=
Filtration efficiency corresponding to different mean pore sizes and pore size variances, figureFileSmall=tueZYfNBNDiGaqo8TgURMQ==, figureFileBig=sLq3yuqjXTayAqUXKSuEkw==, tableContent=null), ArticleFig(id=1325514540439438211, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图5, caption=
不同平均孔径和方差对应的捕集效率, figureFileSmall=tueZYfNBNDiGaqo8TgURMQ==, figureFileBig=sLq3yuqjXTayAqUXKSuEkw==, tableContent=null), ArticleFig(id=1325514540514935684, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.6, caption=
Total filtration efficiency of different mean pore sizes, figureFileSmall=Nq+6a0kK9epguzmPNBbSIQ==, figureFileBig=tJ1xz+m+Zuu9K6LeSt+i9A==, tableContent=null), ArticleFig(id=1325514540582044549, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图6, caption=
不同平均孔径的总捕集效率, figureFileSmall=Nq+6a0kK9epguzmPNBbSIQ==, figureFileBig=tJ1xz+m+Zuu9K6LeSt+i9A==, tableContent=null), ArticleFig(id=1325514540657542022, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.7, caption=
Total filtration efficiency of different pore size variances, figureFileSmall=dVLoS98n/4XDo8w8Yg6aIQ==, figureFileBig=KvCTMoQ0IM0ULq5MN3I+JQ==, tableContent=null), ArticleFig(id=1325514540737233799, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图7, caption=
不同孔径方差的总捕集效率, figureFileSmall=dVLoS98n/4XDo8w8Yg6aIQ==, figureFileBig=KvCTMoQ0IM0ULq5MN3I+JQ==, tableContent=null), ArticleFig(id=1325514540812731272, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.8, caption=
Particle distribution along the radial direction at different times, figureFileSmall=vf1zmecMI5ri7AbuZznKAQ==, figureFileBig=JKutMTwW+O65bnwHyNy4hg==, tableContent=null), ArticleFig(id=1325514540875645833, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图8, caption=
不同时刻颗粒物径向分布, figureFileSmall=vf1zmecMI5ri7AbuZznKAQ==, figureFileBig=JKutMTwW+O65bnwHyNy4hg==, tableContent=null), ArticleFig(id=1325514540955337610, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.9, caption=
Filtration efficiency of Brownian diffusion and interception from 0 to 20minutes, figureFileSmall=WpzmFD/G29k9/e66fva6nA==, figureFileBig=56X3+zajsyXvS8tiJpJNmg==, tableContent=null), ArticleFig(id=1325514541022446475, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图9, caption=
0~20min下布朗扩散和拦截捕集效率, figureFileSmall=WpzmFD/G29k9/e66fva6nA==, figureFileBig=56X3+zajsyXvS8tiJpJNmg==, tableContent=null), ArticleFig(id=1325514541106332556, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Fig.10, caption=
Dynamic filtration efficiency of particles with different sizes, figureFileSmall=HjGHvyuk3PQTUGk9sgK4Mg==, figureFileBig=RGkFwYPLsd4PDad7aPkxGA==, tableContent=null), ArticleFig(id=1325514541181830029, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=图10, caption=
不同粒径颗粒物动态捕集效率, figureFileSmall=HjGHvyuk3PQTUGk9sgK4Mg==, figureFileBig=RGkFwYPLsd4PDad7aPkxGA==, tableContent=null), ArticleFig(id=1325514541295076238, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Tab.1, caption=
Working conditions of model validation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 平均孔径dm/µm | 9.4,11.7,17.7 |
| 孔径方差dv/µm | 7,15,30 |
| 厚度h/mm | 0.31 |
| 初始孔隙率 | 0.56 |
| 壁面渗透速率/(m·s-1) | 0.025,0.050,0.100 |
| 粒径dp/nm | 10~300 |
| 颗粒物密度/(kg·m-3) | 1000 |
| 气体温度/℃ | 200 |
), ArticleFig(id=1325514541362185103, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=表1, caption=
模型验证工况
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 平均孔径dm/µm | 9.4,11.7,17.7 |
| 孔径方差dv/µm | 7,15,30 |
| 厚度h/mm | 0.31 |
| 初始孔隙率 | 0.56 |
| 壁面渗透速率/(m·s-1) | 0.025,0.050,0.100 |
| 粒径dp/nm | 10~300 |
| 颗粒物密度/(kg·m-3) | 1000 |
| 气体温度/℃ | 200 |
), ArticleFig(id=1325514541441876880, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=EN, label=Tab.2, caption=
Parameters of modeling
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 平均孔径dm/µm | 15 |
| 孔径方差dv/µm | 35 |
| 厚度h/mm | 0.31 |
| 平均孔隙率 | 0.56 |
| 最低孔隙率 | 0.45 |
| 壁面速率U/(m·s-1) | 0.05 |
| 入口颗粒数/(个·min-1) | 1×1011 |
| 粒径dp/nm | 10~300 |
), ArticleFig(id=1325514541525762961, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1324806269709726113, language=CN, label=表2, caption=
模拟参数设定
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 平均孔径dm/µm | 15 |
| 孔径方差dv/µm | 35 |
| 厚度h/mm | 0.31 |
| 平均孔隙率 | 0.56 |
| 最低孔隙率 | 0.45 |
| 壁面速率U/(m·s-1) | 0.05 |
| 入口颗粒数/(个·min-1) | 1×1011 |
| 粒径dp/nm | 10~300 |
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