海水泵内部空化可视化测试研究.docx

海水泵内部空化可视化测试研究
Abstract:
Cavitationinsidetheseawaterpumpisacommonprobleminthemarineindustrywhichcausesseveredamagestothepumpsystem.Inthisstudy,avisualizationtestwasconductedonthecavitationphenomenoninsideaseawaterpumptounderstandthemechanismofcavitationanditsimpactonthepumpperformance.Theexperimentwascarriedoutusingatransparentpumpandahigh-speedcameratocapturethecavitationbubbleformationandcollapse.Theanalysisoftheobtaineddatarevealedthatthecavitationinsidethepumpresultsinvariousnegativeeffects,suchaserosion,noise,vibration,andreducedpumpperformance.
Introduction:
Marinepumpsplayavitalroleinvariousapplicationssuchascooling,bilgeevacuation,ballastsystem,firefighting,andothers.Seawaterpumps,inparticular,arewidelyusedinmarineapplicationssincetheyhelptosupplywaterfordifferentpurposes.However,oneofthemainchallengeswithseawaterpumpsisthecavitationphenomenon.Thisphenomenonistheformationofcavitiesorbubblesintheliquidduetopressurechanges,whichsubsequentlyimplodeandcreatehigh-pressurewavesthatdamagethepumpcomponents.
Tocounteractthenegativeeffectsofcavitation,researchersfocusonstudyingitsmechanismanddevelopingnewtechnologiestominimizeitsimpactonthepumpperformance.Inthisstudy,theobjectivewastovisualizethecavitationphenomenoninsideaseawaterpumpandanalyzeitseffectsonthepumpperformance.
Methodology:
Theexperimentwasconductedusingatransparentseawaterpump,whichallowedtheresearcherstoobservethecavitationphenomenoninsidethepump.Thepumpwasconnectedtoawatertank,andtheflowratewasadjustedto2.5m3/h.Ahigh-speedcamerawasusedtocapturethecavitationbubbleformationandcollapseataframerateof1000fps.
Theexperimentwascarriedoutatdifferentflowrates,namely2.5,3,3.5,and4m3/h.Foreachflowrate,thecavitationnumberandthesuctionheadweremeasuredtoensurethatthepumpwasoperatingundercavitationconditions.Thecavitationnumberwascalculatedusingthefollowingformula:
σ=(P-Pv)/(1/2*rho*V²)
whereσisthecavitationnumber,Pisthepressureinsidethepump,Pvisthevaporpressureofthewater,rhoisthewaterdensity,andVistheflowvelocity.