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1、第25卷第10期Vol.25No.10工程力學(xué)2008年10月Oct.2008ENGINEERINGMECHANICS54文章編號(hào):1000-4750(2008)10-0054-06風(fēng)力機(jī)葉片的非定常氣動(dòng)特性計(jì)算方法的改進(jìn)*123伍艷,謝華,王同光(1.空軍第一航空學(xué)院,河南,信陽(yáng)464000;2.武漢大學(xué)水利水電學(xué)院,武漢430072;3.南京航空航天大學(xué)航空宇航學(xué)院,南京210016)摘要:該文從日常的風(fēng)力機(jī)氣動(dòng)設(shè)計(jì)和研究出發(fā),在考慮非定常條件下翼型繞流物理特性的基礎(chǔ)上改進(jìn)動(dòng)態(tài)失速的半經(jīng)驗(yàn)?zāi)?/p>
2、型,先得到二維時(shí)的計(jì)算結(jié)果(即不考慮旋轉(zhuǎn)影響的計(jì)算結(jié)果),再在考慮紊流的情況下分析離心力和哥氏力對(duì)附面層分離的影響來計(jì)算風(fēng)力機(jī)葉片的非定常氣動(dòng)特性,得到三維時(shí)的計(jì)算結(jié)果(即考慮旋轉(zhuǎn)影響的計(jì)算結(jié)果)。分析比較二維和三維時(shí)的計(jì)算結(jié)果,可知采用考慮旋轉(zhuǎn)影響的計(jì)算方法改善了原來二維時(shí)的計(jì)算方法,所得結(jié)果與實(shí)驗(yàn)值吻合得較好。關(guān)鍵詞:流體力學(xué);非定??諝鈩?dòng)力學(xué);三維旋轉(zhuǎn)效應(yīng);風(fēng)力機(jī);動(dòng)態(tài)失速;附面層中圖分類號(hào):V211.3文獻(xiàn)標(biāo)識(shí)碼:AMODIFICATIONOFCALCULATINGUNSTEADYAER
3、ODYNAMICCHARACTERISTICSOFWINDTURBINEBLADES*123WUYan,XIEHua,WANGTong-guang(1.TheFirstAeronauticalInstituteofAirForce,Xinyang,Henan464000,China;2.CollegeofWaterResourceandHydropower,WuhanUniversity,Wuhan430072,China;3.CollegeofAerospaceEngineering,Nanj
4、ingUniversityofAeronauticsandAstronautics,Nanjing210016,China)Abstract:Arationalcalculatingmethodfortheunsteadyaerodynamiccharacteristicsofthewindturbinebladesispresentedinthispaper.Bymodifyingtheunsteadyaerodynamicanddynamicstallmodel,theclassicalmo
5、mentum-bladeelementtheoryisimprovedtoaccountforyaweffectinaquasi-steadymannerforwindturbines,andthenthetwo-dimensional(2-D)resultsarededuced.Whilethethree-dimensional(3-D)rotationaleffectwhichchangesthebladeaerodynamiccharacteristicsgreatlycomparedto
6、itsnon-rotatingcounterpartisnotconsideredinthe2-Dmodel.Basedonthe2-Dmodel,theeffectsofthecentrifugalpumpingandCoriolisforceontheflowseparationundertheturbulenceconditionareanalyzed,andtheanalyticalrelationshipbetweenthe3-Drotationaleffectandtheflowse
7、parationareobtained,whichiscoupledtothe2-Dmodeltogivethe3-Dresults.Boththecalculated2-Dand3-Dresultsarecomparedwithexperimentaldataatdifferentwindvelocitiesandyawedanglesofthewindturbine,showingthatthecalculationisimprovedbytheinclusionofthe3-Drotati
8、onaleffects.Keywords:fluidmechanics;unsteadyaerodynamics;three-dimensionalrotationaleffect;windturbine;dynamicstall;boundarylayer風(fēng)力機(jī)總是在非定??諝鈩?dòng)力環(huán)境中運(yùn)行,非風(fēng))和塔影效應(yīng)等,這些現(xiàn)象使葉片受到非定常氣動(dòng)定常因素包括大氣紊流、風(fēng)剪切、風(fēng)向的變化(側(cè)偏載荷的作用,對(duì)風(fēng)力機(jī)的氣動(dòng)性能和結(jié)構(gòu)疲勞壽命———————————————收稿日期:2007-05-10;修改