資源描述:
《對(duì)于合成射流對(duì)鈍尾緣翼型氣動(dòng)特性的影響》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、學(xué)兔兔www.xuetutu.com第52卷第4期機(jī)械工程學(xué)報(bào)VO1.52NO.42016年2月JOURNALOFMECHANICALENGINEERINGFeb.2016DoI:lO.3901/JME.2016.04.148合成射流對(duì)鈍尾緣翼型氣動(dòng)特性的影響木程曉龍馬朝臣劉恒楊策(北京理工大學(xué)機(jī)械與車(chē)輛學(xué)院北京100081)摘要:研究吸力面存在合成射流的情況下,鈍尾緣翼型TR一4000—2000流場(chǎng)結(jié)構(gòu)的變化及其升阻力系數(shù)等氣動(dòng)特性參數(shù)的變化趨勢(shì)。在相同射流入口速度條件下,采用計(jì)算流體力學(xué)軟件Fluent對(duì)相同來(lái)流速度不同攻角情況下翼型流場(chǎng)進(jìn)行非定常數(shù)值模擬計(jì)算,分析射流
2、前后翼型升阻力系數(shù)變化及翼型表面壓力的波動(dòng)狀況;在此基礎(chǔ)上,對(duì)不同射流頻率和不同射流速度情況下翼型流場(chǎng)進(jìn)行模擬計(jì)算,尋求最佳射流參數(shù)。結(jié)果表明,由于射流及尾緣渦的相互作用導(dǎo)致翼型的升阻力特性不斷變化,鈍尾緣翼型吸力面合成射流有明顯的增升減阻效果,在15。攻角時(shí)尤為明顯,升力系數(shù)提高約40%,阻力系數(shù)減小約25%。在量綱一射流速度和量綱一射流頻率均為1時(shí),射流對(duì)翼型的增升減阻效果最佳。關(guān)鍵詞:合成射流;鈍尾緣翼型;數(shù)值模擬;升阻力特性;壓力波動(dòng)中圖分類(lèi)號(hào):TK40InfluenceofSyntheticJetonAerodynamicCharacteristicsofBlun
3、tTrailingEdgeWindTurbineAirfoilCHENGXiaolongMAChaochenLIUHengYANGCe(SchoolofMechanicalEngineering,BeijingInstituteofTechnology,Beijing100081)Abstract:AstudyonblunttrailingedgewindturbineairfoilTR-4000—2000islunchedtoinvestigatethechangingtrendofflowfiledstructureandaerodynamiccharacteristi
4、cswhenthesyntheticjetexistingonsuctionsur~ce.Keepingtheconstantvelocityofjet,unsteadynumericalsimulationofairfoilflowfieldindifferentattackcomerisperformedbythemeanofComputationalFluidDynamicssoftwareFLUENT,andtheinfluencecausedbyjetonaerodynamiccharacteristicsandthepressurefluctuationonai
5、rfoilsurfaceareanalyzed,basedonthis,thebestjetparametersaredeterminedthrewnumericalsimulationindifferentjetvelocityandfrequency.TheanalyticresultsshowthattheliftanddragcharacteristicoftheairfoilconstantchangesbecauseofinteractionbetweenthesyntheticJetandthetrailingedgevortex,thesyntheticje
6、tonsuctionsurfacehassignificanteffectonliftpromotionanddragreduction,andtheresultisparticularlyobviousatattackangleof15,whereliftcoefficientincreases40%,anddragcoefficientdecreases15%.Besides.thebestjeteffectOccurswhenthedimensionlessjetvelocityandthedimensionlessfrequencyareboth1.Keywords
7、:blunttrailingedgeairfoil;numericalsimulation:liftanddragcharacteristic;pressurefluctuation應(yīng)用到流動(dòng)控制研究中,受到學(xué)術(shù)界的廣泛關(guān)注,0前言其后,針對(duì)合成射流致動(dòng)器的工作機(jī)理及應(yīng)用研究也逐漸成為熱點(diǎn)。在控制流動(dòng)分離原理研究方面,合成射流,也即零質(zhì)量射流,是一種全新的、文獻(xiàn)[2—3]認(rèn)為合成射流在激勵(lì)器出口附近形成“等具有廣泛應(yīng)用前景的流動(dòng)控制技術(shù)。與傳統(tǒng)的流動(dòng)效的虛擬氣動(dòng)外形”,改變了激勵(lì)器附近的邊界層厚控制手段相比,這種射