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1、第31卷2010正第3期3月航空學(xué)報(bào)ACTAAERONAUTICAETASTRONAUTICASINICAV01.31NO.3Mar.2010文章編號:1000-6893(2010)03—0500—06細(xì)長圓錐前體非對稱渦流場的等離子體控制孟宣市1,郭志鑫1,羅時(shí)鈞2,劉鋒2(1.西北工業(yè)大學(xué)翼型葉柵空氣動力學(xué)國學(xué)重點(diǎn)實(shí)驗(yàn)室,陜西西安710072)(2.美國加州大學(xué)爾灣分校機(jī)械與宇航工程系,CA92697—3975)ControlofAsymmetricVorticesoveraSlenderCo
2、nicalForebodyUsingPlasmaActuatorsMengXuanshil,GuoZhixinl,LuoShijun2,LiuFen92(1.NationalKeyLaboratoryofAerodynamicDesignandResearch,NorthwesternPolytechnicalUniversity,Xi’an710072,China)(2.TheDepartmentofMechanicalandAerospaceEngineering,UniversityofCa
3、lifornia,CA92697—3975.America)摘要:應(yīng)用一對單介質(zhì)阻擋放電(SDBD)等離子體激勵(lì)器對頂角為20。的圓錐一圓柱組合體圓錐段分離渦流場進(jìn)行了主動控制試驗(yàn)研究。試驗(yàn)在3.0m×1.6m低速低湍流度風(fēng)洞中進(jìn)行,迎角為45。,基于圓錐段底面直徑的雷諾數(shù)為5×104。流動控制分為等離子體激勵(lì)器關(guān)閉,左舷或右舷等離子體激勵(lì)器分別開啟,左右舷等離子體激勵(lì)器占空循環(huán)3種模式。試驗(yàn)結(jié)果包括7個(gè)測量截面上的周向壓力分布以及積分得到的截面當(dāng)?shù)亓土匾约皥A錐段力和力矩。研究結(jié)果表明,在圓錐
4、頭部尖端處迎風(fēng)面兩側(cè)對稱放置一對SDBD等離子體激勵(lì)器,采用合適的激勵(lì)器形式,并通過適當(dāng)?shù)碾妼W(xué)參數(shù),可以實(shí)現(xiàn)對細(xì)長旋成體側(cè)向力和力矩的比例控制。通過對模型及等離子體激勵(lì)器制作的改進(jìn),相對于前人相應(yīng)的研究結(jié)果,本文中側(cè)向力和力矩隨占空比變化的線性度得到了改善。關(guān)鍵詞:細(xì)長體;非對稱分離渦;大迎角空氣動力學(xué);等離子體;主動流動控制中圖分類號:V211.7文獻(xiàn)標(biāo)識碼:AAbstract:Anexperimentalstudyoftheactivecontrolofvorticesoverslenderf
5、orebodiesisperformedona20。circular-cone-cylindermodelusingapairofsingle-dielectricbarrierdischarge(SDBD)plasmaactuators.Thetestsarecarriedoutina3.0m×1.6mlow—turbulenceandlow—speedwindtunnelatanangleofattackof45。.TheReynoldsnumberbasedonthebasediameter
6、ofthecircularconeis5×104.Theresultsconsistofmeasu—rementsofcircumferentialpressuredistributionsoversevenstationsalongtheconeunderthreedifferentmodesofcontrols:bothplasma-off,plasma—onportorstarboard,andplasmaduty-cycleactuations.Thelocalcross—sectiona
7、landoverallsideforcesandmomentsovertheconearecalculatedfromthemeasuredpressures.TheresultsindicatethatitispossibletOachievelinearproportionalcontrolofthelateralforcesandmomentsoftheslenderbodybytheduty-cycleplasmaflowcontroltechniquewithappropriatelyd
8、esignedplasmaactuatorsandselectedelectricparameters.Thelinearityofthecontrolledlateralforcesandmomentswithrespecttothedutycycleisimprovedoverpreviousstudiesbecauseoftheimproveddesignoftheactuators.Keywords:slenderbody;asymmetricvortex;highangl