壁流式陶瓷颗粒过滤器结构特性分析(3)

时间:2025-07-08

壁流式陶瓷颗粒过滤器结构特性分析

AnalysisoftheStructureCharacteristicsfortheCeramic

FilterWallFlow

Abstract

CeramicWallflowfilterisalleffectivecarbonparticulatematterpurificationdeviceonthedieselenginevehicle.Alongwithautomobileemissionstandardrequestmorestrict,inthecraftmicro—structureandtheperformance,strengthenrequirementgradually,achieveshighere佑ciency,lowerexhaustresistance.

Ceramicwallflowfiltermodelincludesmanynarrawmicrochannels.Theusualflowfieldanalysisonthecompmerconsidertheentirefilter勰porous

PM

analysis

porouszone,cannotgetcharacteristicparametersofthemicrochannelflowdistributionandTlliSarticlefocusesondepositiondensity.interiorflowqualityandofthelongandnarrowmicrochannelselectedfour1/4channels

onthefourWalls弱thecalculation,analysisofmicro.channelwall

channelstructure

respectivelyisbothsidesoftheflowparameters.seekoptimumvalueofthemicroofthreekindofmodelswhichwidthofchannlsFLUENTsoftware,thethree

thesimulationwithsize.MainlYconsider1.2mm,1.0mm,0.8mm,usingtheondimensionalhexahedronbodymeshstructure.haScarried

analysisonk.£turbulencemodel,itsstaticpressurefield,velocityfieldandthecarbonparticaldensityfield.

Computionresultsofthedifferentwidthofsidemicrochannelindicatethathalfwidthofthe1.2mmmodelhaSlowexhaustresistance,goodcarbonpelletdepositioncharacteristic,

byhalfathenselectedhalfwidthofthe1.2mmmodel.Followedlengthof1.2mmonthe

modelselectedoftheinletvelocityof20m/S,30m/S,40m/Sfor

showsthat20m/smodelwith

certainstructuresizefilterasimulationtorespectively,betterflowcharacteristics.Accordingtheidealresultundertheaboveobtains,quality.

totheCanonlYobtaincertainflowIncreasesthewidthofchannelandtheitemofnumbertobeadvantageousfilter

e硒ciency

widthenhancement.In

toacertainCROSS.sectionalarea,numberoffilter'sitemwithchannelandthewallthicknessofthesquareisinreverseproportion.Therefore,toimprovetheitemortoincreaSethewidthofsideis

contradictory.纬西enCannotgetbothofthem。increaSeanitemofnumbertobecometheusualchoice,thequestionistheenhancementofthetechnolo …… 此处隐藏:247字,全部文档内容请下载后查看。喜欢就下载吧 ……

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