叶尖喷气对风力机气动性能影响的数值研究

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1、沈阳航空工业学院硕士学位论文叶尖喷气对风力机气动性能影响的数值研究姓名：李秋悦申请学位级别：硕士专业：航空宇航推进理论与工程指导教师：申振华20070101沈阳航空工业学院硕士学位论文AbstractThispaperdescribessomebasictheoriesofwindturbine，andbasicissuesofairfoilsandwindturbinewhichincludethegeometricparameters，aerodynamleparametersandSOon，andalsointroduc

2、esthemathematicalandphysicalfoundationsandnumericalstimulatingmethodsofwindturbineblade．Throughanalyzingworkprincipleofthewindturbine，anewtechniqueisproposedwhichusesamethodofjetattheblade—tipofwindturbinetoenhancetheefficiencyofwindturbine．The3-Dnumericalstimulatio

3、nsofthewilldturbineiscompletedinthispaperwhosebladeUSeSNACA4424airfoilasbaselineairfoil，thentheoriginalblade，thebladeofjetatitstrailingedge，thebladeofjetatitssuctionsurfaceattheblade·tip，andthebladeofjetatitspressuresurfacearestimulatednumericallybythesoft'wareFLUEN

4、T．Thecalculatingresultsindicatethattheshapesofthejetnozzlehavetheimportanteffectsontheaerodynamicperformancesofthewindturbine：!ksthejetnozzleisoftheequalsectionalarea,theoutputpowerofallwindturbineswithva'iablejetarrangementsgenerallyislowerthanofthewindturbinewitht

5、heoriginalbladenoraatterhowmanyitspitchinganglesare；butasthejetnozzleiscontracted，thecalculatingrcsultsofitsperformancesaresignificantlyimproved．anditsoutputpowerwillbeenhancedby10．4％atthepitchingangleis8。．AndjetatthepressuresurfaceofbladesismoresuitabletcIbiggerpit

6、chingangles；theresultsofthejctattrailingedgeofthebladeisbetterthanatthesuctionsurfaceonthewhole，butifthepositionofjetatsuctionsurface，areaofspoutandjetdirectionaresuitable，theresultsofjetatthesuctionsurfacewillbebetterthanthejetatthetrailingedge．Ingeneral，thejettech

7、niqueattheblade-tipisapromisinginthefuture，whichcarlincreasethepowerofwindturbinegreatly,butitstillneedstodofurtherinvestigationstooptimizevariableparameters．Keywords：windturbine；airfoil；numericalstimulation；blade；jet-II-沈陴I航空1二业学院硕士学位论文．Ⅵ．原创性声明本人郑重声明：所呈交的学位论文是本人在导师

8、的指导下独立完成的。除文中已经注明引用的内容外，本论文不包含其他个人或集体已经发表或撰写过的作品或成果，也不包含本人为获得其他学位而使用过的成果。对本文研究做出重要贡献的个人或集体均已在论文中进行了说明并表示谢意。本声明的法律后果由本人承担。论文作者签名：耋叙t匦p旬年／月如