基于CFD的船用離心泵葉輪抗汽蝕優(yōu)化設(shè)計.pdf

1、大連海事大學(xué)碩士學(xué)位論文基于CFD的船用離心泵葉輪抗汽蝕優(yōu)化設(shè)計姓名：李毅申請學(xué)位級別：碩士專業(yè)：載運工具運用工程指導(dǎo)教師：鄒玉堂201206英文摘要ABSTRACTCentrifugalpumpiswidelyusedinmodemships，itaccountsforalargeproportionoftheship’smanufacturingandenergyconsumptionThecentrifugalpumpimpell

2、ercavitationhasbeenoneoftheimportantreasonsthataffecttheperformanceofthecentrifugalpumpInthispaper，theCFDmethodisusedtoanalysisandC—alculatheintemalflowfieldofthecentrifugalpump，anoptimizeddesigntoimprovethecavitationres

3、istanceofthecentrifugalpumpimpellerisproposed，whichisofgreatsignificanceinthestudyofthecentrifugalpumpInthispaper，threeparametersareselectedforouranalyzationandcalculatio‘n：thenumberofbladesofthecentrifugalpumpimpeller，w

4、idthofimportsandtheShapeofimport，themainworkisasfollows：1Studyingthestructuralcharacteristicsofthecentrifugalpump，analyzingthecausesandhazardsofthecentrifugalpumpcavitationknowaboutthepresentstatu—Sofresearchonthecavitat

5、ionresistanceofthecentrifugalpumpbothhomeandabroad；2Tomasterthethree—dimensionalmechanicaldesignsoftwareSolidWorksandrelatedmodelingmethods，modelingtheimpellerandvoluteflowusingSolidWorks；3Griddingtheimpellerandvoluteflo

6、wmodelwithusingpreprocessorforCFDsoftwareGAMBIT，includingimportandexportsettingsandinterfacesettings；4ImportgriddingflowmodelentitiesintothefluentsoftwareforinternalfloWfieldanalysis，includingsettingthephysicalproperties

7、ofthemedium，theboundaryconditionsandcalculationmethods；5ByanalyzingthepressureandvelocitymapsoftheimpellerandvolutefloWbynumericalsimulationcombinedwiththeanalysisofthecentrifugalpumpheadandefficiency，alloptimaldesignoft

8、hecentrifugalpumPimpellerisproposedThemainconclusionsdrawninthispaperareasfollows：theCFDanalysisshoWSthatincreasethenumberofimpellerbladesappropriately；increasethewidthOfimportsproperlyincentrifugalpump；suitableimpelleri

9、mportedshapecallimprov—ethecavitationresistanceofthecentrifugalpumpimpeller，whilekeepotherperformanceunaffectedevenimprovedWhenwedesignthemechanicalstructureofthecentrifugalpump，usingtheCFDmethodtocalculatetheflowfieldpe