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1、上海理工大學(xué)學(xué)報(bào)第37卷第4期J.UniversityofShanghaiforScienceandTechnologyVo1.37No.42015文章編號:1007—6735(2015)04—0332—07DOI:10.13255/j.cnki.jusst.2015.04.006翼型擺角對氣動性能的影響分析季康,李春,葉舟,楊陽(1.上海理工大學(xué)能源與動力工程學(xué)院,上海200093;2.上海理工大學(xué)能源與動力工程學(xué)院上海市動力工程多相流動與傳熱重點(diǎn)實(shí)驗(yàn)室,上海200093)摘要:基于NRELs809翼型,研究尾翼擺角對于翼型氣動性能的影響.通過對比升阻力系數(shù)的模擬值與實(shí)驗(yàn)值,
2、排除了網(wǎng)格質(zhì)量對翼型氣動性能的影響,驗(yàn)證了利用S—A(Spalart.Allmaras)湍流模型對風(fēng)力機(jī)翼型進(jìn)行計(jì)算的有效性,確定了合理的模擬方案,分析了翼型的氣動性能.在此基礎(chǔ)上,將S809翼型進(jìn)行了尾緣變形,生成S8O9上擺一5。、下擺5。、10。及15。這4種變形翼型.再利用CFD(computationalfluiddynamics)軟件對它們進(jìn)行數(shù)值計(jì)算,分析了各個(gè)翼型升阻力系數(shù)及流場特性.研究表明,隨著尾緣下擺角度的增加,變形翼型上下表面壓差逐漸增大,下擺翼型在升阻力特性方面有較大改善.但隨著翼型下擺角度的增大,翼型產(chǎn)生分離渦的攻角卻隨之減小,更易失速.而上擺翼型升
3、阻力特性及失速特性均不如原始翼型.關(guān)鍵詞:翼型;尾緣;數(shù)值模擬;氣動性能中圖分類號:TK83文獻(xiàn)標(biāo)志碼:AInfluenceofAirfoilPendulumAngleonAerodynamicPerformanceJIKang,klChun,YEZhou~,YANGYang(1.SchoolofEnergyandPowerEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China;2.ShanghaiKeyLaboratoryofMultiphaseFlowandHeatTransf
4、erinPowerEngineering,ScholofEnergyandPowerEngineering,UniversityofShanghaifoScienceandTechnology,Shanghai200093,China)Abstract:NRELS809airfoilwasselectedasanobjecttostudytheimpactoftrailingedgeangleonitsaerodynamicperformances.Thesimulationresultswerecomparedwiththeexperimentonestoruleoutthe
5、gridqualityeffectsonaerodynamicperformance,theeffectivenessofS—A(Spalart—Allmaras)turbulencemode1wasverifiedandareasonablesimulationschemewasmadesuretoanalyzetheairfoilwellandtruly.Onthisbasis,the$809trailingedgeswinganglewasalteredtogenerate$809—5。,5。,10。,15。deformedairfoils.ThentheCFDsoftw
6、arewasusedtoanalyzenumericallyeachairfoil’Saerodynamiccharacteristics.Withtheincreaseoftrailingedgeswingangle,thedifferentialpressureontheupperandlowersurfacesoftheairfoilbecomesbigger.Soforthepositiveswingangleairfoilstheliftandresistancecharacteristicsareimproved,however,whentheairfoilswin
7、gangleisincreased,theangleofattackbecomessmallerandtheseparationvortexwouldappear.Fornegativeswingangleairfoils,allofthelift,resistanceandstallingcharacteristicsarWnrSe.收稿日期:2014—05—19基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(F,51176129);上海市教委科研創(chuàng)新(重點(diǎn))資助項(xiàng)目(13ZZ120,13YZ066)