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大攻角水下航行体自然空泡流的数值模拟研究(英文).docx

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大攻角水下航行体自然空泡流的数值模拟研究(英文) Abstract: Inthisstudy,weperformednumericalsimulationsofthenaturalbubbleflowaroundanunderwatervehicleatahighangleofattack.ThesimulationswerecarriedoutusingtheOpenFOAMcode,whichisbasedonthefinitevolumemethod.Theobjectiveofthisstudyistoinvestigatetheeffectsofthebubbleflowonthehydrodynamiccharacteristicsoftheunderwatervehicleathighanglesofattack.Theresultsshowedthatthenaturalbubbleflowcancausesignificantchangesinthesurfacepressuredistributionandtheliftanddragcoefficientsofthevehicle.Thestudyprovidesvaluableinsightsintotheflowpatternsaroundunderwatervehiclesandcanhelpinthedesignandoptimizationofsuchvehicles. Introduction: Underwatervehicleshavebecomeincreasinglyimportantinvariousfields,suchasoceanresourceexploration,militaryoperations,andscientificresearch.Designingandoptimizingthesevehiclesforhighmaneuverabilityandefficiencyrequireagoodunderstandingofthehydrodynamiccharacteristicsofthevehicles,particularlyathighanglesofattack.Highanglesofattackarecommoninunderwatervehicleoperations,especiallyinchallengingenvironmentswheremaneuverabilityandstabilityarecrucial.Theflowaroundanunderwatervehicleathighanglesofattackiscomplexandinvolvesmanyphenomena,includingtheformationofnaturalbubblesonthevehiclesurface.Thesebubblescansignificantlyaffectthevehicle'shydrodynamiccharacteristics,leadingtochangesintheliftanddragcoefficientsandthesurfacepressuredistribution. NumericalMethod: Forthisstudy,weusedtheOpenFOAMcode,whichisapopularopen-sourcesoftwarepackageforcomputationalfluiddynamics(CFD).Thecodeisbasedonthefinitevolumemethodandiscapableofsimulatingawiderangeoffluidflows,includingmultiphaseflowsandturbulence.Thesimulationswereperformedonameshedgeometryofanunderwatervehicleatahighangleofattack.ThemeshwascreatedusingtheblockMeshutilityinOpenFOAM,andthesimulationswerecarriedusingtherhoPisoFoamsolver,whichiswell-suitedforsimulatingmultiphaseflows. Results: Thenumericalsimulationsshowthatthenaturalbubbleflowsignificantlyaffectsthehydrodynamiccharacteristicsoftheund