powerflow空气动力学教程.ppt

AerodynamicOptimizationofHeavyTrucks,Agenda,ProjectProcessPowerFLOWIntroduceApplicationExamplesCustomers,ExaCorporationConfidential,ExaConfidential,PS,P1,P2,P3,P4,M1D,P5,J1,Design/Styling,VehicleEngrg/Development,Body/ChassisEngrg,PrototypeBuild&Manuf.,MultipleThemesNarrowedto3,ReferenceModel,SingleTheme,DesignConcepts,DesignIntentCAD,FinalSurfaceSign-off,UpperBody-AeroDesignSensitivity,ReferenceVehicleTesting,M1PrototypeTesting/Development,VPPrototypeTesting/Development,Benchmarking,ClayModel/PrototypeTesting/Development,UpdateCoolingModule,UnderbodyPanels,ComponentDetailTuning,Wheels/Tires,MirrorDesign,Preparation&M1Build,Preparation&VPBuild,ProductionProcess&Tooling,StartMassProduction,VP,M1,SurfaceFreeze,DesignFreeze,EngrgComplete,VehicleAerodynamicsProductDevelopmentProcess,VehicleEvaluation&Development,Design,TargetSetting,StrategyDevelopment,DevelopmentofProductionFacilities/Tooling,3,UpperBody-SolveAeroProblemstoMeetTargets,AeroDevices/Deflectors,GrilleOpeningsProvideSufficientCoolingFlow,ExasAerodynamicsDigitalSimulationProcess,ThemeSelected,UpperBodyFreeze,ModelFreeze,Agenda,ProjectProcessPowerFLOWIntroduceApplicationExamplesCustomers,ExaCorporationConfidential,UniqueTechnology,DIGITALPHYSICS,DENSITYMOMENTUMENERGY,ExtendedLattice-BoltzmannBasedSolverMoreFundamentalApproachWiderRangeofPhysicalValiditythanNavier-StokesComplexfluidsFrommicrotomacroscalesTimeDependentInherentlyunsteadyfluidmechanicsBenefitsEfficiency&scalabilityNosignificantartificialdissipationFast,timedependentsolverRobust&physicalrealizationofboundaryconditionsFullyautomatedgridgeneration,“PowerFLOWcontainsastate-of-the-artturbulencemodelthathassignificantadvantages.Withthismodel,PowerFLOWgivesextraordinaryresultsforthemostcomplexturbulentflows”Prof.SteveA.Orszag,PerceyF.SmithProfessorofMathematics,YaleUniversity,ExaCorporationConfidential,SimulationProcess,GeometryPreparation,CaseSetup,Simulation,ResultsAnalysis,ModifyGeometry,TypicalProcess,FacetedModel&Setup,Results,CAD,PowerFLOW,Grid,Setup,Simulation,5to6daysfor1stresult1dayperoptimization,Simulation,CAD&CFDModules,CADCFD,Agenda,ProjectProcessPowerFLOWIntroduceApplicationExamplesCustomers,ExaCorporationConfidential,ExaCorporationConfidential,AreasofInterestforAerodynamicOptimization,CabinfrontwithcornervanesandbumperapronRoofspoilerTrimtabSideextenderTractorsidepanelsTrailerflowguideTrailersidepanels,FlowImpingementIncreasesDrag,ExaCorporationConfidential,ApplicationExamples,3%FuelSavingfromSidePanels5%FuelSavingfromBoat-tailing,ExaCorporationConfidential,ExternalAerodynamicsCabinOptimization(latePre-SOP),WhyPowerFLOWwaschosen/usedTraditionalWTtestinghigheffortandtoolateinprocessDNWWindtunnel250kperweek+MANmandays+logisticsObjectivesSelectbestpossibleDeflectorshapeCoverthetractor/trailorgapbestGetbest-in-classTGAtruckImpactMultipledeflectorvariantsDragreducedby30counts,KambizSalari,etalDOEHeavyVehicleSystemsReviewApril18-20,2006,ExaCorporationConfidential,ExternalAerodynamicsCabinOptimization(latePre-SOP),Savingsandbenefits5%FuelSavingsSaving1:Fuel35l/100km150.000km/p.a.52.500l5%=2.625l3.000p.a.3.000,-*7years=21.000totalSaving2:Time800l/fueltank2.200-2.400km3-4stopsrefuelsp.a.+extendedrange100km,Motivation,Tyreswithextralowrollingresistance3-5%,Electronicallycontrolledcoolingfan0.5-1.2%,Sideairdeflectors0.2%,Revisedairconditioning0.5%,Improvedairpressuresupply0.5-1.0%,Frontunderrunprotection(FUP)0.2%,Modifiedretarder0.5%,Roofairdeflectorforhighbodywork3%,KenworthTruck,Partof$15BPACCARGroupFocusonDeliveringValuetoFleetOwnersReliantonTechnologyforCompetitiveEdgeEXA/IBMCloudComputingEarlyStageAerodynamicOptimizationAverageFleetSaves$1M/Year,Weexclusivelydoourengineeringandaerodynamicsworkindigital,Feightsays.Putanotherway,theyreinitforthelonghaul.,PeterbiltTruck,AlsopartofPACCARGroupAchieved12%improvedfueleconomyImplementationofnew“aerodynamicpackage”Each1%fuelsaving=$5,600savingsinfuelperye