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1、ARTICLEINPRESSJournalofWindEngineeringandIndustrialAerodynamics96(2008)1320–1331ContentslistsavailableatScienceDirectJournalofWindEngineeringandIndustrialAerodynamicsjournalhomepage:www.elsevier.com/locate/jweiaRotationalandturbulenceeffectsonawindturbinebla
2、de.Investigationofthestallmechanisms,1C.Sicot,P.Devinant,S.Loyer,J.HureauLaboratoiredeMe´caniqueetd’Energe´tique,Polytech’Orle´ans,8rueLe´onarddeVinci,45072Orle´ans,Cedex02,FrancearticleinfoabstractArticlehistory:Theaimofthisstudywastoevaluateexperimentally
3、rotationandReceived12July2006turbulenceeffectsonawindturbinebladeaerodynamics,Receivedinrevisedformfocusingparticularlyonstallmechanisms.Thewindtunneltests24April2007consistedinsurfacepressuremeasurementsonahorizontalaxisAccepted18January2008windturbineairfo
4、ilsubjectedtofreestreamturbulencelevelsAvailableonline23April2008varyingfrom4.5%to12%.AmethodtodeterminethepositionofKeywords:theseparationpointontherotatingblade,basedonthechordwiseWindturbinebladepressuregradientintheseparatedarea,isproposed.TheresultsAero
5、dynamicsshowedaninfluenceofthefreestreamturbulencelevelontheTurbulenceseparationpointposition.ExperimentalresultsintheliteratureRotationaleffectsWindtunnelshowedliftaugmentationforarotatingblade.Inourcase,theStallmechanismsstudyoftheseparationpointpositioncou
6、pledwiththepressuredistributionsontheairfoilshowsthatthisliftaugmentationseemsrelatedtoalowervalueofthepressureintheseparatedarearatherthantoastalldelayphenomenon.&2008ElsevierLtd.Allrightsreserved.1.IntroductionThisinvestigationispartofageneralstudyoftheeff
7、ectsofhighturbulencelevelsontheaerodynamicsofhorizontalaxiswindturbines(HAWTs).ThisisacontinuationoftheworkalreadycarriedoutinthelaboratorybyDevinantetal.(2002)andSicotetal.(2006a).TheflowfieldsencounteredbyHAWTbladesarehighlycomplexduetothesimultaneouspresenc
8、eofunsteadiness,three-dimensionality,rotationalandturbulenceinfluences.Thiscomplexityleadstothelackofaccurateandreliablemethodsformodellingwindturbinebladesaerodynamics(SchreckandRobinson,2002).
