14 FFT AeroAcoustics

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1、ACTRAN/Aero-Acoustics+L.HZZZKLNHWHFKFRPJulienManeraContentMainobjectives/targetapplicationsMihllMainchallenges/i/ingreditdientsICFDingeneralICFDingeneral–keyfeatureskeyfeaturesNewingredientsinrecentreleasesNewingredients+L.HinrecentZZZKLNHWHFKF

2、RPreleasesApplicationsPerspectives2Mainobjectives/targetapplicationsMainobjectives/targetapplicationsReplacesmodulepreviouslyknownas:Applications:–ACTRAN/LA–FanContainsalladvancedfeaturesfor–HVAC,coolingsystems,Ductsaero-acousticsmodeling–Sidemirror,rai

3、ngutters,sunroof–InterfacetoCFDcodesbuffetting,A-pillar,etc–HandlingofLighthillsourceterm–LandingGear–HandlingofMöhringsourceterm–MoregenerallyalltheapplicationswhhterethhiidtenoiseisduetoRequiresturbulenceACTRANAcousticsasapre-requisite+L.HZZZKLNHWHFK

4、FRP3ContentMainobjectives/targetapplicationsMihllMainchallenges/i/ingreditdientsICFDingeneralICFDingeneral–keyfeatureskeyfeaturesNewingredientsinrecentreleasesNewingredients+L.HinrecentZZZKLNHWHFKFRPreleasesApplicationsPerspectives4Mainchallenges/

5、ingredientsMainchallenges/ingredientsEasyprocedure:CFDandacousticcomputationalchainsaredecoupledEfficientprocedure:mappingstrategy(integrationtechnique)Apureacoustic(integrationtechnique).Apureacousticmeshingcriterionissufficient:thereisnoneedforarefinemen

6、tofthemeshinthesourceszoneRobustprocedure:ACTRANdirectlyreadsnativeCFDfilesPossibilitytoeasilystudy:+L.HZZZKLNHWHFKFRP–Designinfluence:comparisonofthenoisegeneratedbydifferentgeometries–Acoustictreatmentinfluence:ACTRANcanaccuratelymodelglasswool,rock

7、wool,etc…thankstotheACTRANporouselementsoradmittanceboundaryconditionboundarycondition5Mainchallenges/ingredientsMainchallenges/ingredientsParallelcomputation:–Sources–Acousticpropagation–ScalabilityisalmostlinearSideMirrorNoiseAero-vibro-acousticcomputati

8、ons:–Thestructurecanbemodeledbyavisco-elasticshell–Thedamping/absorbingmaterialscanbemodeledusingtheBiotmodld/deland/oradittdm+L.Hittance,ettcZZZKLNHWHFKFRP–Differentstrategiesarepossible•U