壁流式陶瓷颗粒过滤器结构特性分析(3)
时间:2025-07-08
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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