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1、“ExtendedSpotlight”aboutAeroacousticsDec.2014©2014CD-adapco™-Allrightsreserved–Distributionprohibited1Outline•Introduction:afewwordsaboutAeroacoustics...•Aeroacoustics:acompletechainoftoolsforacompleteanalysis–Preprocessingandsteady-stateanalysis–Unsteadyanalysis–P
2、ost-processingandanalysisoftheresults•Examplesofapplications–Ductedproblems(exhaustsystems,HVACducts,pipes...)–Rotatingdevices(fans,blowers,propellers)–ExternalAerodynamics(Landinggear,sunroofbuffeting)–Aero-Vibro-AcousticsAVA(side-mirrorapplications)•Someconclusio
3、ns©2014CD-adapco™-Allrightsreserved–Distributionprohibited2Outline•Introduction:afewwordsaboutAeroacoustics...•Aeroacoustics:acompletechainoftoolsforacompleteanalysis–Preprocessingandsteady-stateanalysis–Unsteadyanalysis–Post-processingandanalysisoftheresults•Examp
4、lesofapplications–Ductedproblems(exhaustsystems,HVACducts,pipes...)–Rotatingdevices(fans,blowers,propellers)–ExternalAerodynamics(Landinggear,sunroofbuffeting)–Aero-Vibro-AcousticsAVA(side-mirrorapplications)•Someconclusions©2014CD-adapco™-Allrightsreserved–Distrib
5、utionprohibited3Introduction:afewwordsaboutAeroacoustics...•Aeroacoustics:flow-inducednoise–CAAmeans“ComputationalAero-Acoustics”–Thenoiseistheresultofaveryweakpressurefluctuation–Itisacompressible,unsteadyphenomenon–Challengesinclude•Verydifferentwavelengthstoreso
6、lve•FarfieldNon-ReflectiveBoundaryConditions•Dispersionanddissipationerrors•Largefrequencybandwidthmeanslongtimeseriesandsmalltimesteps•Largecomputationaldomainsrequired•Interpretationoftheresults•Highcomputationalcost©2014CD-adapco™-Allrightsreserved–Distributionp
7、rohibited4Outline•Introduction:afewwordsaboutAeroacoustics...•Aeroacoustics:acompletechainoftoolsforacompleteanalysis–Preprocessingandsteady-stateanalysis–Unsteadyanalysis–Post-processingandanalysisoftheresults•Examplesofapplications–Ductedproblems(exhaustsystems,H
8、VACducts,pipes...)–Rotatingdevices(fans,blowers,propellers)–ExternalAerodynamics(Landinggear,sunroofbuffeting)–Aero-Vibro-AcousticsAVA(side-mirro
