InnovationinBladeAerodynamics

葉片氣動設(shè)計的創(chuàng)新

Personalintroduction

個人簡介KeesHuckriedeBladedesignengineeratFlowChange(theNetherlands)

荷蘭FlowChange公司葉片設(shè)計工程師8yearsexperienceinbladedesign:AerodynamicdesignStructuraldesignManufacturing在葉片設(shè)計方面有8年的經(jīng)驗:氣動設(shè)計結(jié)構(gòu)設(shè)計生產(chǎn)Companyintroduction

公司簡介FlowChangewasfoundedin2016intheNetherlandsFlowChange于2016年在荷蘭成立Developmentaeroadd-onsystemsforincreasingperformanceofexistingblades

研發(fā)各種氣動附加系統(tǒng)，來增加現(xiàn)存葉片的性能。Winglet葉尖小翼Vortexgenerators渦流發(fā)生器Camberflap襟翼Trailingedgeblock后緣塊Airfoildevelopment翼型開發(fā)Subjectpresentation:

“Windturbinepowerboostingbymeansofawingletadd-on:

designandanalyses”

主題報告：

“通過應(yīng)用葉尖小翼來增加風機發(fā)電量：

設(shè)計與分析”

6MWdownwindturbine,140.6mrotorwindclassIoffshore6兆瓦下風向風機，風輪直徑140.6米，海上一類風場Tiplosseffect

葉尖損失效應(yīng)Tipvortex葉尖渦流Pressureside壓力面Decreaseofliftintiparea葉尖升力下降LtipRadialflow輻流葉片升力分布Wingleteffect

小翼效應(yīng)LtipPressureside壓力面Tipvortexshift葉尖渦流轉(zhuǎn)移LwingletFlowaroundtipblocked葉尖的氣流被阻礙葉片升力分布LtipLwingletIncreasetorquebytip提高葉尖扭矩分Wingleteffect

小翼效應(yīng)LtipLwinglet葉尖升力分布Wingleteffectonpowerboosting

小翼對增功的影響DecreaseoftiplosseffectincreasespowercoefficientCp降低葉尖損失效應(yīng)，增加功率系數(shù)CpPowerincreaseforsubratedwindspeeds增加葉片在低于額定風速運轉(zhuǎn)時的發(fā)電量Designwingletadd-on

附加小翼設(shè)計Mountedonexistingbladetiponsite在現(xiàn)場，為現(xiàn)有葉片安裝小翼

Lwinglet=Ltip小翼長度=葉尖長度Ltip=2%ofbladelength葉尖長充=2%的葉片長度Equaltipshape尖端形狀相同Constantchord+thickness

相同的弦長和厚度Rotorsimulationwithwinglet

加上葉尖小翼的葉片模擬Physics氣流動態(tài)

Computationtime計算時間BEMLLMCFDLiftingLineMethodWingleteffectmodelledNowingletshapeincluded升力線法

模型內(nèi)加入了小翼效應(yīng)未考慮小翼形狀BladeElementMomentum Nowingletmodellingpossible Tiplosseffectbycorrectionmodel 葉素動量不可能在模型中加入小翼修正模型中才考慮葉尖損失Navier-StokesFlowCompleteflowmodellingResource&timeconsuming納維－斯托克斯流完整流場模型需要大量資源和時間3DPanelMethod(Potentialflow+dragmodel)WingleteffectmodelledWingletshapeincluded3D面元法（潛在流+阻力模型）模型內(nèi)加入了小翼效應(yīng)考慮了小翼形狀Selected選擇3Dpanel11Input:3Dpanelledbladecontour+initialfixedwake輸入：3D面化的葉片輪廓+最初的固定尾流Output:Pressure+velocitiesatbladesurface+fixedwake輸出：壓力+葉片表面速度+固定的尾流3Dpanelmethod

3D面元法的葉片模擬EngineeringDragModel

工程阻力法Adddragtosolutioninpost-processing:在后處理時，在解決方案中增加阻力因素。

Inviscidsolutionfrompanelmethod面元法的非粘性方案FlowAoA氣流攻角Lift升力Viscid2Dairfoildata(e.g.measurements)粘性2D翼形數(shù)據(jù)（例如測量）+

Drag

阻力

Finalsolution:最終解決方案+drag+阻力Wingletanalyses

小翼分析Powercalculated:subratedwindspeeds5m/s-12m/s在低于額定風速（5米/秒-12米/秒）時，計算的發(fā)電量Wingletvariableparameters:UpwindordownwindorientationTwist小翼可變參數(shù):上風向或下風向扭角

Downwind下風向Upwind上風向Constanttwist恒定的扭角Twistrange-2degtill8deg扭角范圍–2-8度Numberofcases:88工況數(shù)量：88Examplepressuredistribution

壓力分布的ABCABCSuctionside

吸力面Increaseinpressuredifferencevisibleintiparea在葉尖處增加的壓力變化可見Wingletpowerboostingresults

小翼增功結(jié)果Maximumpowerincrease:最大功率提升：Downwind:+3.6%Upwind:+3.1%Annualyieldincrease(windclassI-Coffshore):年發(fā)電量提升:Downwind:+4.5%Upwind:+4.1%最大功率提升Summerizing

總結(jié)3Dpanelmethod+Engineeringdragmodel:SuitableforwingletanalysesLargeparameterstudypossibleinshorttime3D面元法+工程阻力模型:適合小翼分在短時間內(nèi)，可考慮大量的參數(shù)Summerizing

總結(jié)Powerboostingbywingletadd-on:WingletorienteddownwindgivesoverallhigherperformanceMaxpowerincrease+3.6%Annualyieldincrease+4.5%附加小翼的發(fā)電量提升:下風向小翼的表現(xiàn)更好最大功率提升

+3.6%年發(fā)電量提升

+4.5%Nextsteps

下一步Additionalanalyses:LoadlevelWingletshapesCFDverification 額外分析:載荷小翼外形計算流體力學驗證Structuraldesign:DesignclampingmechanismManufacturingprototypewingletadd-on結(jié)構(gòu)設(shè)計:設(shè)計夾裝機制生產(chǎn)小翼樣件Installationonsite:Powerandloadsmeasurem