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1、ComputedeffectsofthenumberofguidevanesonperformanceofimpulseturbineforOWCsystemCUIYingi,LIUZhen1,2,JINJiyuana,SHIHongdai,2(1.CollegeofEngineering,OceanUniversityofChina,Qingdao266100;2.ShandongProvincialKeyLaboratoryofOceanEngineering,Qingdao266100;3.KoreaIn
2、stituteofOceanScienceandTechnology,Daejon305-343)Abstract:Theimpulseturbine,asanimportantcomponenttorthesecondenergyconversionofOscillatingWaterColumn(OWC)waveenergyconverter,iscapableofconvertinglowpressurepneumaticenergyintomechanicalshaftpowerinthecon-dit
3、ionofbi-directionalflow.Asispresentedinthepreviousreports,theeffectsofguidevanesandrotorgeometries,tipclearanceandhubradiohavebeeninvestigatedwithbothexperimentalmethodandnumericalanalysis,exceptingtheeffectsofthenumberofguidevanes.Thepresentpaperaimstobench
4、markthenumericalsimulationresultswiththeexperimentaldataandtoexploretheeffectsofthenumberofguidevanesonperformanceofimpulseturbinewithfixedguidevanesforstructureoptimizationwiththeapplicationofthrcc-dimcnsionalComputationalFluidDynamics(CFD)analysis.Inthiswo
5、rk,Gambit2.4andFluent14.5arcemployedtobuild3-Dmodelsoftheturbincwithdifferentnumbersofguidevanes・Asaresult,thecohereneebctwccncomputedandexperimentaldataissatisfactory,andtheturbinewith30guidevanesispredictedtoobtainahigherefficiency.Keywords:Harbor,Coastala
6、ndOffshoreEngineering;ImpulseTurbine;OWC;NumberofGuideVanes;NumericalSimulation;CFD0IntroductionTheOscillatingWaterColumn(OWC)waveenergyconverter,whichisutilizedmostwidelyallovertheworld,experiencestwoprimaryenergyconversions.Thechamberconvertswaveenergyinto
7、low-pressurepneumaticenergyintheformofbi-directionalairflow,followedwiththeimpulseturbineextractingmechanicalshaftpowerwhichistransformedintoelectricalpowerbyageneratorsubsequently・1BackgroundLIReviewofpreviousresearchesTheimpulseturbinewithfixedguidevanesis
8、akindofairturbinescalledself-rectifyingturbineswhichareabletorotateuni-directionallyinbi-directionalairflow.Therehavebeenafewreportsonimpulseturbinewithfixedguidevaneswithbothexperimentalmethoda
