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某两栖车绕流场数值模拟研究及外形优化分析.docx

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某两栖车绕流场数值模拟研究及外形优化分析 Abstract Asamphibiousvehicleshavebecomeanincreasinglyimportantmeansoftransportation,theirdesignmustbeoptimizedtoimprovetheiraerodynamicperformance.Thisstudyusesnumericalsimulationstoinvestigatetheflowfieldaroundanamphibiousvehicleandoptimizeitsshapeformaximumefficiency.Thesimulationsarebasedoncomputationalfluiddynamicsandinvestigatetheeffectsofdifferenthullshapes,waterdepths,andflowvelocitiesonthevehicle'shydrodynamicperformance.Theresultsdemonstratethattheoptimizedhullshapeproducessignificantlyreduceddragandincreasedlift,makingitmoreefficientinwater. Keywords:amphibiousvehicle,computationalfluiddynamics,flowfield,hullshapeoptimization,hydrodynamicperformance. Introduction Amphibiousvehicleshavegainedincreasingimportanceinrecentyearsastheyprovideaconvenientmeansoftransportationthatcantravelbothonlandandwater.However,theaerodynamicdesignofthesevehiclesiscriticaltotheirperformance,particularlyinwater.Tooptimizeavehicle'sshapeformaximumefficiency,itisnecessarytounderstandtheflowfieldaroundthevehicleanditseffectsonthevehicle'shydrodynamicperformance. Inthisstudy,weusecomputationalfluiddynamics(CFD)toinvestigatetheflowfieldaroundanamphibiousvehicleandtooptimizeitsshapeformaximumefficiency.Weanalyzetheeffectsofdifferenthullshapes,waterdepths,andflowvelocitiesonthevehicle'shydrodynamicperformanceandcomparetheresultsofsimulationwithexperiments.Finally,weproposeamodifiedhullshapedesignthatprovidessignificantimprovementsinthevehicle'sefficiencyinwater. Methods WeusedANSYSFluentsoftwaretoperform3Dsimulationsoftheflowfieldaroundanamphibiousvehicle.Thevehicle'shullgeometrywasmodeledbasedonreal-lifespecifications,andthematerialswereassumedtobeconstantandhomogeneous.Thesimulationswereconductedusingak-omegaSSTturbulentmodelwithstandardwallfunctions.Thevehiclewassimulatedatdifferentwaterdepths,flowvelocities,andwithdifferenthullgeometries.Thesimulationsweconductedincludedresistanceandliftcoefficientscalculations. Toverifytheaccuracyofthesimulationresults,weperfo