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ID:32224302
大小:6.23 MB
页数:62页
时间:2019-02-01
《主要结构参数对直线翼垂直轴风力机性能分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、东北农业大学工学硕士学位论文直线翼垂直轴风力机输出性能的影响。选用了0.25、0.33、0.5三种直径比进行计算,并将计算结果与单机结果进行了对比。通过研究得出直径比为0.5时直线翼垂直轴风力机的输出性能最佳,同时其起动性能相对于单机提高了约2倍。综上所述.本研究通过风洞试验和数值模拟计算的方法从结构参数的角度对直线翼垂直轴风力机的性能进行了较为系统的研究。主要的创新点包括以下两点:一、提出了与Savonius风轮组合时的结合角度对直线翼风力机起动性能的影响并进行了风洞试验研究,提出了较优的组合方式;二、利用风洞试验的方法实际测试了主要结构参数对风力机低转速下的输出性
2、能,并探索出了一定影响规律,为风力机的设计提供了有益的参考。关键词直线翼垂直轴风力机:起动性能:输出性能:风洞试验:数值模拟计算nABSTRACTResearchonEffectofMainStructuralParametersonPerformanceofStraight·-bladedVerticalAxisWindTurbinetAbstractStraight.bladeVerticalAxisWindTurbine,SB—VAWTforshort,iSakindoflifttypewindturbinewithsimplestructure.SB-VAWT
3、isgoodatutilizationofwindenergyandCallbemaintainedconvenient.Recently,withthedevelopmentofSmallandmedium-sizedwindpowermarket’SB-VAWThasbeenfocusedbymoreandmorepeople.TheperformanceofSB-VAWTincludesstartingperformanceandoutputperformance.Ahighstartingperformancemeans溺∥丁canrunatalowwinds
4、peedandahighoutputperformancemeansVAWTCanoutputmorepoweratratedspeed.ForSB·VAWT,itsdevelopmentismainlyrestrictedbyitslowstartingperformance.Usually,therearetwowaystoimprovethestartingperformanceofSB·VAWT,theoneistochangeitsstructureandtheotherwayisinstallingassistequipment.Themainstruct
5、uralparametersofSB.VAWTcontainairfoilofblade,radiusofwindturbine,numberofblades.ItiSimportanttoverifystructuralparameterseffectonstartingperformanceofSB一溺∥rCombinedwithSavoniusrotorisaneffectivewaytoimprovestartingperformanceofSB-VAVfranditsfeasiblehasbeenproved。However,awrongcombinedwa
6、yCanleadtoSavoniusrotorkeepingthebladeof溯∥7out,thenstartingperformanceofSavoniusrotorisdecreased.SoitiSnecessarytoresearchcombinationangle’SeffectonstartingperformanceofSB-Ⅵ~WLIntheresearchofairfoilofblade,NACA0018.NACA5520andFX63-145arccho∞n.Amongtheseblades,NACA0018mean5symmetricairfo
7、il,NACA5520meansasymmetricandstickairfoil,FX63-145mean$asymmetricandthinairfoil.WjndtunneItestiSusedtotestthestartingwindspeedofVAWTwithdifferentairfoilsatdifferentangleofattacks.Accordingtotheresults。symmetricairfoilisbetterthanasymmetricairfoiIandstickairfoiliSbetterthanthina
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