BM 帶小葉片的高壓比壓氣機葉輪設計BladeGen實例

BladeGen

HPCompressorImpellerwithSplitter帶小葉片的高壓比壓氣機葉輪Concepts

概念Inthistutorialwewill:InputinitialdesignparametersInputinitialangle/thicknessparametersOptimizethemeridionalviewAdjustthebladeanglesDefinetheshapeofLEandTESaveyourworkInitialDesignParameters

初始化設計參數(shù)CFX-BladeGenallowstheusertocreateabladesystemfromscratch,usingoneofsixstandardinitialconfigurationtypes.Forthisexample,aRadialImpellerisused.SelecttheFile|New|CFX-BladeGenModelmenucommandortoolbarbuttonwhichwilldisplaytheInitialMeridionalConfigurationDialogSelecttheRadialImpellertabEntertheparametersfortheinitialbladelayout(shownonthefollowingslide).BesuretoselectAng/ThkmodeinthebottomrightcornerPressEnterorselecttheOKbuttontocontinueDesignParameters

設計參數(shù)定義DesignparameterstobeenteredfortheRadialImpellerTemplate:InitialAngle/Thickness

葉角和厚度初始定義EnterInitialAngle/ThicknessParameters:Nominalwrapangleof85°包角85°Thicknessof3mmNumberofblades:6ClickOKMeridionalViewOptimization

子午面視圖優(yōu)化OptimizingtheMeridionalView優(yōu)化子午面視圖InletandOutletlocation(points)havetobeadjustedinordertoextendtheinletinupstreamandtheoutletindownstreamdirection延長進出口InletandOutletModification

進出口修改Doubleclicktheshroudinletpoint(topleft)

Enter-45and69forthehorizontalandverticalvalues.ClickOK.Forthehubinletpoint(bottomleft),enter:-45and30ClickOKFortheshroudoutletpoint(topleft),enter:82and175ClickOKForthehuboutletpoint(topright),enter:86.5and175ClickOK

BladeAnglesattheHub

輪轂葉角TheHubLayerisactivebydefault(reddot)Right-clickintheAngleviewandselect:AdjustBladeAnglesIntheLeadingEdgetab,enter40ofortheBetavalue.Tang.Betaautomaticallybecomes50o.Leavealltheothervaluesastheyare.IntheTrailingEdgetab,enteraBetaangleof30o.LeaveThetaangle85oClickOKBladeAnglesattheShroud

機匣葉角ActivatetheShroudLayerbyclickingtheblackdotatthetopofthelayercolumn(itwillbecomered)Right-clickintheAngleviewandselect:AdjustBladeAnglesIntheLeadingEdgetab,enter62.5ofortheBetavalue.Leavealltheothervaluesastheyare.IntheTrailingEdgetab,enteraBetaangleof30oandThetavalueto84o.Leaveallothervaluesastheyare.ClickOKBladeAngleDistribution

葉角分布Afterthebladeangleadjustments,theangledistributiononthehubandshroudwilllooklikeaspresentedbelow:HubShroudBladeThicknessProfile

葉片厚度剖面BladeThicknesscanbedefinedintheThicknessview.Inthisexample,thethicknesswillbeconsideredconstantwiththevalueof3mm.Nomodificationwillberequired.ShapeofLeading/TrailingEdge

導緣和尾緣形狀ToprescribetheLeading/TrailingEdgeShape:SelectBlade|PropertiesmenucommandsorthetoolbarbuttonlocatedonthelefthandsideoftheCFX-BladeGenwindowtosetthebladeproperties.SetthevaluesonLE/TEEllipse（橢圓）tabasshownonthenextslideAllothervaluescanremainunchanged.

BladePropertyDialog

葉片屬性對話框SelectLETypetobeEllipsewithappropriateEllipticRatiosSelectTETypetobeCut-offAddingSplitterBlade

增加分離葉片SelecttheBlade>AddSplittermenucommandorthetoolbarbuttontogetBladePropertyDialogueDefaultvaluesintheLocation/Definitiontabwillbeused,sothatthesplitterwillbeplacedatthemainblademid-pitchThisisobtainedbyselectingOffset(PitchFraction)tobe0.5indefinitionoftheSplitterAngularOffset

SplitterBladeLE/TEshape

分離葉片導緣/尾緣形狀SelecttheLE/TEEllipsetabandsettheLEEllipticRatioto4forbothhubandshroudIntheLE/TECut-Off,enabletheLEoptionandenter0.35forthehuband0.4fortheshroud.ClickOKAfterAddingtheSplitterBladeAfterthesplitterbladehasbeencreated,therearesomenewfeaturesintheGUItonote,asshowninthenexttwoslides.IntheMeridionalview,thesplitterLeadingEdgewillbeshown.IntheAuxiliaryview,thesplitterbladewillbeshownlocatedatthemid-pitchbetweenmainblades.ThelocationofthesplitterLeadingEdgewillalsobeshowninangleviewandThicknessview.GraphicalLayoutattheHubGraphicalLayoutattheShroudModelPropertiesDialogSetthemodelproperties:Model>PropertiesEnsureModelUnitsareSetSavingtheFileSavethefileFile>SaveAsortheSaveAsiconFilename:HPCompressorImpeller.bgdGobacktotheProjectpageandopenDesignModeler(clickNewgeometry)UsethesameunitsthatweredefinedinBladeGen(mm)BladeEditorClicktheBladeEditoriconAcceptthedefaultfileHPCompressorImpeller.bgdWewantthefluiddomainforaCFDanalysisIntheDetailsViewChangeHubOffsetto2mmSetCreateBladesto1ClickGenerateSavethemodelHPCompressorImpeller.agdbSuggestionsforExtr