The New Audi A1 – Aerodynamics, Aeroacoustics, Thermal Management and Air Conditioning

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1、AudiA1AerodynAmics

2、AeroAcousTicsTheNewAudiA1AerodynAmics,AeroAcoustics,thermAlmAnAgementAndAirconditioningThelowestpossiblefuelconsumptionandahighstandardofdrivingrefinementareamongAudi’sprimarydevelopmentobjectives.Theemphasisisthereforeonoptimalbodyaerodynamicswithlowairflownoiselevelsandthebest

3、possibleheating,ventilationandairconditioningsystemswithaviewtoachievinghighcustomerbenefit,comfortandconvenience.Thebasisforthisisthedevelopment,integrationandpursuitofnewtechnologiesandconceptsfromthedefinitionphasetoseries-productionreadiness.Thisworkisaidedbytheoperationofthermaltestrigsandthe

4、developmentenvironmentprovidedbyoneoftheworld’smostmodernwind-tunnelcentres.Theaimistoofferthecustomerthebestpossiblecom-fortandconvenienceandatthesametimethelowestpossiblefuelconsumption.64Customers’fuelConsumption–AuTHorsdevelopmenttArgetInaperiodinwhichthefocusoftechnicaldevelopmentisonreducing

5、vehicles’COemissions,newpathshavetobeexplored.2TheaimistotakemanysmallstepsforwardwiththeaimofachievingasinglemajorsteptowardCOreduction.Develop-2mentstepsandresultswithapositiveeffectoncustomers’fueldr.miChAelsChreflconsumptionaredescribedbelow.isresponsibleformodelseriesAerodynamics/Aeroacoustic

6、sdevelopmentontheA0modelseriesAerodynAmiCsatAudiAGiningolstadt(Germany).WhentheAudiA1’saerodynamicconceptwasdrawnup,thefocuswasonreducingaerodynamicdragwithoutadverselyaffectingexteriordesign.Topromoteagileroadbehaviourtheaimwastoensurelowaerodynamicliftatthefrontandrearaxles.Toachievethis,theprod

7、uctcreationprocessinAudi’saerodynamicdevelopmentareaisalwaysdividedintotwogeorgtentropmainphases:isresponsible,amongotherareas,:Intheearlyconceptphase,windtunneltestsareconductedfortheA0andAmodelserieswithinBodyThermalmanagementdesign/onquarter-scaleclaymodels.Thesemeasurementsarecom-Applicationde

8、velopmentatplementedbyCFD(ComputationalFluidDynamics)simula-AudiAGiningolstadt(Germany).tionsusing“OpenFOAM”software.Paralleluseenablestheadvantagesofbothmethodstobecombinedandthedraw-backscompensatedfor.WhereasC