基于FLUENT的管道内壁表面状态对流体摩擦阻力的影响研究-付宜风

20145395LUBＲICATIONENGINEEＲINGMay2014Vol.39No.5DOI10.3969/j.issn.0254－0150.2014.05.00551379166.2013－08－231990—[e-mail]*112113131.4300632.NSW20063.430063檿檿檿檿檿檿檿檿檿、。FLUENT、。。FLUENTTE973A0254－01502014檿檿檿檿檿檿檿檿檿5－023－5EffectsofPipelineInnerSurfaceFeaturesonFluidFrictionalＲesistanceUsingFLUENTAnalysisFuYifeng1LeiChengwang12ZhangXuan1BaiXiuqin13YuanChengqing131.SchoolofEnergyandPowerEngineeringWuhanUniversityofTechnologyWuhanHubei430063China2.SchoolofCivilEngineeringTheUniversityofSydneySydneyNSW2006Australia3.KeyLaboratoryofMarinePowerEngineering＆TechnologyMinistryofTransportWuhanUniversityofTechnologyWuhanHubei430063ChinaAbstractTheinternalsurfacefeaturesofthelong-pipelineduringitsrunningprocesswillchangesignificantlybytheinfluenceofcor-rosionandfoulingandthusitsflowfieldwillchangetoresultinthechangeofthefluidfrictionalresistancecorrespondingly.Currentlytherearefewstudiesinthisfield.ThefrictionalresistanceofinnerpipelineaftercorrosionandfoulingoccurwasanalyzedthroughnumericalsimulationbyFLUENT.Thesimulationresultsshowthatthecirculationareaofthepipeisdecreasedafterfoulingandthedragcoefficientalongthepipelinebecomessmallerbutthepressuredropperunitlengthandthetotalenergylossareincreased.Inthecaseofcorrosionthedragcoefficientalongthepipelineandpressuredropperunitlengtharedecreasedindicatingthatthepipewithirregularsurfacemayhavethepositioneffectofdragreductionafteraddingcorrosionpits.Theresearchprovidesareferenceforpipelinedragreductionbasedonsurfacetexturedesign.KeywordsFLUENTfrictionalresistancecorrosionfouling1/2～1/31。。。、2。、。FLUENT3、。、。1。1%～2%1。。FLUENTλ。24z1+p1ρg+v122g=z2+p2ρg+v222g+hf1hf=λLdv22g212λ=2ΔpdLρv23Δpvλ、λ。22.1。。ρ=860kg/m3v=2×105mm2/sμ=0.0172Pa·s。L=2mD=0.3me=0.10mm1。1Fig1Thegeometrymodelofthepipe2.2DirectNumericalSimulation。LargeEddySimulation、Ｒeynolds。。LES。ＲANSＲANS。ＲANSＲNGk－ε。33.1、、。。。5。4239。1∑uixi=042ρuit+xiρuiuj－μ+μtujxi+uix()[]j=pxi+ρfi53kρkt+xiρuik－μ+μtδ()kkx()[]i=G－ρε64ερεt+xiρuiε－μ+μtδ()kεx()[]i=Cε1Gεk－Cε2ρε2k7Cμ=0.09δk=1.0δε=1.3Cε1=1.44Cε2=1.926。3.212m/s233。GAMBIT。。SIMPLE7。0.30.7。10－3。44.1FLUENT。23、。2x=03x=0Fig2Contourofvelocityatx=0ofpipewithoutfoulingFig3Contourofpressureatx=0ofpipewithoutfouling81cm。2m/s2.3m/s。FLUENT45。4x=05x=0Fig4Contourofvelocityatx=0offoulingpipeFig5Contourofpressureatx=0offoulingpipe5220145FLUENT2cm12。。1ZTable1AveragespeedandpressurealongZofthepipewithoutfoulingandfoulingpipex/mmv/m·s－1p/Pa10002.00－288.57919002.00－496.61110002.30－373.66419002.30－643.731。2。2Table2ComparisonofthepressurecalculatedwithdifferentgridZ=1mp/PaZ=1.9mp/PaΔp/Paλ184672－288.579－496.611208.0320.0403336144－279.342－484.463205.1210.0398500288－274.382－477.755203.3730.0394。λ=2ΔpdLρv2=2×208.032×0.30.9×860×22=0.0403λ=2ΔpdLρv2=2×270.066×0.30.9×860×2.32=0.0397Ｒe=vdυ=4Qπdυd。λ=0.3164Ｒe－0.25。。。。。4.2。GAMBIT。300mm10mm8mm。67。67Fig6PipewithcorrosionpitsFig7Meshedcomputationalzone6239。FLUENT、893。8x=09x=0Fig8Contourofvelocityatx=0offoulingpipeFig9Contourofpressureatx=0offoulingpipe3ZTable3AveragespeedandpressurealongZofcorrosionpipex/mmv/m·s－1p/Pa10001.99－206.94219001.99－384.147λ=2ΔpdLρv2=2×177.205×0.30.9×860×22=0.03430.0403。。。10。。BearmanHarvey94×104～3×1050.009。10。11。10Fig10Flowfiledofcorrosionpipealongtheinnersurface51。2FLUENT。3。1．M．2008．2．M．20086－10．3．CFDD．2011．1077220145FLUENT4490N·cm319N·cm。。。42Fig4Tappingtorquetestresultsofsample254Fig5Tappingtorquetestresultsofsample441MicroTap、、。。2、、、。1.J．2004295131－132.ZhuJiarongChenJiugen.TheresearchstatusanddevelopmentcurrentofmetalcuttingfluidJ．LubricationEngineering2004295131－132.2.J．200126268－69.SunJianguoLiuZhenchang.TheessentialityandfeasibilityofgreencuttingfluidsJ．LubricationEngineering200124268－69.3.J．200025565－68.GongQingyeYuLaigui.ThetribologyenvironmentalfriendlylubricantsandadditivesJ．LubricationEngineering200025565－68.4SkoldＲolf.MethodofproducinganamideproductmixtureanamideproductmixtureandtheusethereofUS5523431P．1994－03－16.5.J．201025239－44.HongJing.StudyonreplacementofchlorinatedparaffinwithpolymericesterinmetalcuttingfluidsJ．LubricatingOil201025239－44.6.L-MHEC22J．20063569－11.YuXiangLiuXiaojun.DevelopmentofL-MHEC22cuttingoilJ．ShandongChemicalIndustry20063569－11.274．M．2001134－137．5．M．20047－13．6KaushikVVＲ．CFDsimulationofcoreannularflowthroughsuddencontractionandexpansionJ．JournalofPetroleumSci-enceandEngineering．201286－87153－164．7．FLUENTM．2012243－253．8．M．2005．9BearmanPWHarveyJK．ControlofcircularcylinderflowbytheuseofdimplesJ．AIAAJ1993311753－1756．10．D．20124－6．11GhoshSDasGDasPK．SimulationofcoreannulardownflowthroughCFDAcomprehensivestudyJ．ChemicalEngineer-ingandProcessing2010491222－1228．70120145