气动噪声模型使用指南

ANSYSFluentANSYSFluent.........................................................................................11ANSYSFluent...................................................................................1.....................................................................................................1.............................................................2.........................................................................................22ANSYSFluent...........................................................................................4.........................................................................................4.....................................................................................................7...................................................................................................163ANSYSFluent.............................................................................................22.........................................................................................................................22.............................................................................................................26.............................................................................................................311ANSYSFluentANSYSFluentCAACAAANSYSFluentN-SDNSRANSDESLESCAACAAAPUCAAANSYSFluentCAALESANSYSFluentLighthillCAAANSYSFluentCAADESLESANSYSFluentFfowcsWilliamsandHawkingsFW-HFW-HLighthillANSYSFluentURANSLESDESANSYSFluentANSYSFluentFW-HANSYSFluentANSYSFluentFW-HFFTANSYSFluentSPLANSYSFluentFW-HFW-HANSYSFluentRANSProudmanEulerLilleyANSYSFluent1)ProudmanüProudman1952ProudmanüANSYSFluentAcousticPowerAcousticPowerLeveldB2)TurbulentBoundaryLayerNoiseüANSYSFluentSurfaceAcousticPower[W/m^2]SurfaceAcousticPowerLeveldBüTurbulentBoundaryLayerNoiseüTurbulentBoundaryLayerNoise3)SourceTermsinLinearizedEulerEquations(LEE)EulerüN-SüShearnoiseSelfnoiseüANSYSFluentStochasticNoiseGenerationandRadiationSNGR4)LilleyLilleyLilleyShearnoiseSelfnoiseShearnoiseSelfnoiseüANSYSFluentStochasticNoiseGenerationandRadiationSNGRBroadbandCAABroadbandRANS2ANSYSFluent1231SSTSADESSASLESANSYSFluentDESSASDESANSYSCFXSASLESLESF-WHASDCGNS2.5D5D10D3Zones220020045PlotFFTAutoprunedthesignalatreceiver-1.OverallSoundPressureLevelindB(referencepressure=2.000000e-05)=1.156805e+02Autoprunedthesignalatreceiver-2.OverallSoundPressureLevelindB(referencepressure=2.000000e-05)=1.043936e+02PSDCAACAACAAFluentSASSASCAA1Fluent2options3plotFFT3ANSYSFluentRevell,J.D.,Prydz,R.A.,andHays,A.P.,\ExperimentalStudyofAirframeNoisevs.DragRelationshipforCircularCylinders,LockheedReport28074,Feb.1977.FinalReportforNASAContractNAS1-1440333223Cell1LESAir:Density1.225ViscousModel:LESSmagorinsky-LillyP-VCoupling:FractionalStepSpatial-Discretization:Green-GaussNodeBased,PRESTO,BoundedCentralDifferencingTransientFormulation:SecondOrderImplicit,Non-IterativeTime-AdvancementTimeStepSize:5E-6TotalTime:0.03s2SASAir:Density1.225ViscousModel:Scale-AdaptiveSimulationP-VCoupling:FractionalStepSpatial-Discretization:Green-GaussNodeBased,PRESTO,BoundedCentralDifferencing,SecondOrderUpwindTransientFormulation:SecondOrderImplicit,Non-IterativeTime-AdvancementTimeStepSize:5E-6TotalTime:0.03sAcousticsModel:Ffowcs-Wiliams&Hawkings110[1/s]10000[1/s]23dBSASLESEXPReceiver1115.68115.96117Receiver2104.39104.671004SASLESPeng,S.-H.,Leicher,S.,andHaase,W.,DESandHybridRANS-LESModellingofUnsteadyPressureOscillationsandFlowFeaturesinaRectangularCavity,2ndSymposiumonHybridRANS-LESMethods,Corfu,Greece,17-18June200719414CellSASAir:ideal-gasViscousModel:Scale-AdaptiveSimulationP-VCoupling:FractionalStepSpatial-Discretization:LeastSquaresCellBased,SecondOrder,BoundedCentralDifferencing,SecondOrderUpwindTransientFormulation:SecondOrderImplicitCourantNumber:50MomentumERF:0.4PressureERF:0.5TimeStepSize:5E-5TotalTime:0.4sAcousticsModel:Ffowcs-Wiliams&Hawkings+CAA12101000034ANSYSFluentK20K29K20GregK20ANSYSFluentSASGregK29ANSYSFluentSASGregNACA0012ICEMCFD34268Cell1E41.3E7Ma=0.50.8Alpha850m0mairfoilTypewallinterfaceinteriorreceiver1receiver2Compute/Writereceiver-1.ardreceiver-2.ardSPLMa0.5SPLreceiver-18.367013e+01receiver-27.770380e+01Ma0.8SPLreceiver-11.137277e+002receiver-27.618446e+001SPL