4-Jinli Feng_Computational Aeroacoustics in STAR-CCM+_CD-adapco

《4-Jinli Feng_Computational Aeroacoustics in STAR-CCM+_CD-adapco》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ComputationalAeroacousticswithSTAR-CCM+Industries&ApplicationsPowerGenerationAerospace•Pipe/duct/cavityresonancesAutomotive•HighLiftDevices•Compressor/turbine/combustor•Wingmirror•LandingGear•Sunroofnoise•Jetnoise•HVACsystems•Turbochargers•Coolingfans•TransmissionlossBuildingEnviron

2、mentElectronicscooling•HVACducting•Fannoise•Fannoise•AirconditioningMarine•Propellernoise•Hull/propeller/rudderinteractionSomeCharacteristicFlowNoiseIssuesHVACUnitsLandinggearsFlow-ductresonancesSunroofbuffetingCompressorsTrailingedgenoiseAeroacousticsinSTAR-CCM+ComputationalAeroaco

3、usticsDirectNoiseCalculationHybridMethods•Dividethesimulationintoseveral•Simulatesallflowandacousticsstepswithinonesinglesimulation•CFDiscarriedouttocapturesoundsources•AdditionalsimulationstepspropagatesthesourcestoanobserverlocationAeroacousticsinSTAR-CCM+ComputationalAeroacoustic

4、sDirectNoiseCalculationHybridMethods•Dividethesimulationintoseveral•Simulatesallflowandacousticsstepswithinonesinglesimulation•CFDiscarriedouttocapturesoundsources•AdditionalsimulationstepspropagatesthesourcestoanobserverlocationDirectNoiseCalculationsSolvenoisesourcegenerationandso

5、undpropagationsimultaneously–SinglenumericalmethodUnsteady,compressibleCFD–LES/DESWhentouseDNC?–Shortsoundpropagationdistance–Strongfluid-acoustictwo-waycoupling–Whennohybridmethodsareavailable/applicableSunroof/side-windowbuffetingWallComplianceandInternalDamping–ImplicitandCorrela

6、tedtreatmentsLeakagetreatmentsUncorrectedCorrelatedRef:SAE2013-01-1012WhistlinginpipesystemsRef:AIAA-2012-2171Flow-excitedpipevibrations–Experimentshowsvibrationstohaveafrequencyof~100HzTransientLEScalculationtomodeltheflowinthissystem.Usespectralanalysisandfilteringtoidentifywhichf

7、eaturesoftheflowcouplewiththestructuretoinducevibrations.DuctFlowNoiseAnalysisHVACductanalysisatJaguarLandRover–Studyofnoisesourceswithinaductandpropagationtotheoutside–Simulationresultscomparedtoexperiments–Goodagreementseenbothinsideandoutsidetheduct10dBSoundpressurelevelsinside(t

8、op)andoutside(botto