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基于流固耦合的低水头混流式水轮机转轮叶片静力分析 Title:StaticAnalysisofMixed-FlowTurbineBladesBasedonFluid-StructureInteractionwithLowHead 1.Introduction: Theutilizationofmixed-flowturbinesinlowheadhydropowerplantshasgainedsignificantattentionduetotheirefficientenergyconversioncapabilities.Thedesignandanalysisoftheturbinebladesarecrucialforensuringthesafeandreliableoperationoftheseturbines.Thispaperaimstopresentastaticanalysisofmixed-flowturbinebladesusingafluid-structureinteractionapproachinalowheadscenario. 2.Fluid-StructureInteraction: Fluid-structureinteraction(FSI)isacoupledanalysistechniquethatconsidersthedynamicinteractionbetweenthefluidflowandthestructuralresponse.Inthecaseofmixed-flowturbines,FSIanalysisisessentialasthemotionofthefluiddirectlyimpactsthebladeperformanceandviceversa.ByconsideringtheFSIeffect,amoreaccurateassessmentoftheblade'sstructuralintegrityandoperationalcharacteristicscanbeachieved. 3.LowHeadOperation: Lowheadturbinesaredesignedtooperateunderrelativelysmallwaterheads,typicallyupto30meters.Thelowheadoperationposeschallengesintermsofthedesignandperformanceoftheturbineblades.Thelowerwaterheadresultsinlowerfluidvelocities,requiringspecializedbladeprofilesandgeometriestoeffectivelycaptureenergyfromthewater.Thestaticanalysisoftheturbinebladesiscrucialtodeterminetheirstrengthandstabilityundertheappliedloads. 4.BladeDesign: Thedesignofmixed-flowturbinebladesinvolvesconsiderationsofbothhydraulicandstructuralaspects.Thebladeprofileisoptimizedtoensureefficientenergyconversionandminimallosses.Thestructuraldesignfocusesonbladestrength,stability,andtheabilitytoresisttheappliedfluidforces.Thebladematerialselectionisalsoessentialtowithstandtheharshhydraulicenvironment. 5.StaticAnalysisMethodology: Thestaticanalysisoftheturbinebladescanbeperformedusingfiniteelementanalysis(FEA)techniques.Inthisstudy,theFSIsimulationsareconductedtocapturethefluidpressureactingonthebladesurfacesandhowitaffectstheblade'sstructuralresponse.TheFSIanalysisconsidersthefluidpressureandthecorrespondingf