基于COMSOL多物理场固体颗粒对天然气管道弯管冲蚀影响研究

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Abstract：Astheconstructionof naturalgaspipelinesrapidlydevelops，erosion-inducedleakageandrupturerisksduringpipeline operationbecomeicreasinglyprominent.Basedonthetracking interfaceofCOMSOLmulti-physicsfieldparticles，thispaperadopts the k-ω turbulencemodel toconductnumericalsimulationsontheerosionconditionof thepipelineelbow，andcompares andanalyzes theinfluencinglawsofsveralfctors，cludingtefuidmdia，pipebendingangleurvaturetoametertiondfloloityon elbowerosion.Theresultsshow thatthelargermassdensityoffluid medialeadstoasmalermaximumerosionrate butalarger maximumerosionincidenceacuteangle，withthemaximumerosionratedecreasing withtherisingcurvature-to-diameterratioof pipe bending.Additionallundertheincreasingpipebendingangle，themaximumerosionratepresentsaparabolicangetrend，acing the largest value at 45∘ . The rising flow velocity of the media leads to a significantly increasing maximum erosion rate.The study provides a quantitative basis for erosion-resistant design and operation management of natural gas pipelines.

Keywords：multi-physics field; solid particle; pipe bending; erosion law; numerical simulation

气流携带固体颗粒（如砂粒、铁锈）撞击管壁，因切削、变形或剥离作用导致材料表面磨损的现象称为“冲蚀”Ⅲ。（剩余7711字）