基于FBM模型的轴流泵空化流动特性CFD分析.docx

基于FBM模型的轴流泵空化流动特性CFD分析
Abstract
Inthispaper,theCavitationflowcharacteristicsofanaxialflowpumpbasedontheFBMmodelwillbeinvestigatedthroughCFDanalysis.Cavitationisacriticalphenomenonthatoccursinfluidflowsystemsandaffectstheperformanceandstabilityofthepump.TheFBMmodelisawidelyusedturbulencemodelinCFDsimulations,andithasbeenproventobeaccurateinpredictingthebehavioroffluidflowswithcomplexgeometriesandshearflows.Inthispaper,thecavitationflowcharacteristicsofanaxialflowpump,includingtheformationanddevelopmentofcavitationbubbles,theoccurrenceofcavitationinstabilities,andtheireffectsontheperformanceofthepump,willbeanalyzedusingtheFBMmodel.
Introduction
Axialflowpumpsarewidelyusedinvariousindustries,suchaswatersupply,powergeneration,andchemicalmanufacturing,duetotheirhighefficiencyandflowcapacity.However,theoccurrenceofcavitationinaxialflowpumpscanhaveadverseeffectsontheirperformanceandcausedamagetotheircomponents.Cavitationisaphenomenonthatoccurswhenthepressureofthefluidfallsbelowthevaporpressure,wherevaporbubblesareformedintheliquidflow.Whenthesebubblesmovetoaregionofhigherpressure,theycanimplode,leadingtohigh-pressureshockwavesanderosivedamagetothepumpcomponents.
CFDsimulationisaneffectivemethodforpredictingthebehavioroffluidflowsandtheoccurrenceofcavitationinpumps,whichcanhelpinthedesignandoptimizationofpumpcomponentsandimprovetheirreliabilityandefficiency.TheFBMmodelisawell-knownturbulencemodelthathasbeenproventobeaccurateinsimulatingfluidflowswithcomplexgeometriesandshearflows.
FluidDescription
Theflowthroughanaxialpumpismodeledbythethree-dimensional,incompressibleNavier-StokesequationsthataremodifiedbytheFBMturbulentmodel.Theflowisassumedtobeturbulentandthefluidisconsideredasasingle-phase,incompressiblefluid.Thefluidproperties,includingitsdensityandviscosity,areassumedtobeconstantthroughoutthedomain.
GeometryDescription
Thegeometryoftheaxialflowpumpismodeledasacylindricaldomainwithaninletandoutletsectionandanimpellersectioncomprisingthreeblades.Thedimensionsofthepumpare