powerflow空氣動力學教程.ppt
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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 GrilleOpenings ProvideSufficientCoolingFlow Exa sAerodynamicsDigitalSimulationProcess 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 5to6daysfor1stresult 1dayperoptimization Simulation CAD CFDModules CADCFD Agenda ProjectProcessPowerFLOWIntroduceApplicationExamplesCustomers ExaCorporationConfidential ExaCorporationConfidential AreasofInterestforAerodynamicOptimization CabinfrontwithcornervanesandbumperapronRoofspoilerTrimtabSideextenderTractorsidepanelsTrailerflowguideTrailersidepanels FlowImpingementIncreasesDrag ExaCorporationConfidential ApplicationExamples 3 FuelSavingfromSidePanels5 FuelSavingfromBoat tailing ExaCorporationConfidential ExternalAerodynamicsCabinOptimization latePre SOP WhyPowerFLOWwaschosen usedTraditionalWTtestinghigheffortandtoolateinprocessDNWWindtunnel 250k perweek MANmandays logisticsObjectivesSelectbestpossibleDeflectorshapeCoverthetractor trailorgapbestGetbest in classTGAtruckImpactMultipledeflectorvariantsDragreducedby30counts KambizSalari etalDOEHeavyVehicleSystemsReviewApril18 20 2006 ExaCorporationConfidential ExternalAerodynamicsCabinOptimization latePre SOP Savingsandbenefits 5 FuelSavingsSaving1 Fuel35l 100km150 000km p a 52 500l5 2 625l 3 000 p a 3 000 7years 21 000 totalSaving2 Time800l fueltank 2 200 2 400km3 4stopsrefuelsp a extendedrange 100km 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 they reinitforthelonghaul PeterbiltTruck AlsopartofPACCARGroupAchieved12 improvedfueleconomyImplementationofnew aerodynamicpackage Each1 fuelsaving 5 600savingsinfuelperyearpertruck 2 30 galat130 000miles yr Agenda ProjectProcessPowerFLOWIntroduceApplicationExamplesCustomers ExaCorporationConfidential ExaCustomers ExaCustomers ExaCorporationConfidential ChineseCustomers
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