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《葉尖間隙對(duì)跨聲速風(fēng)扇葉片顫振特性的影響研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、葉尖間隙對(duì)跨聲速風(fēng)扇葉片顫振特性的影響研究（能源與動(dòng)力工程學(xué)院，北京100083）摘要：本文旨在使用數(shù)伉計(jì)算方法研究風(fēng)扇葉片葉尖間隙大小對(duì)葉片顫振特性的影響。研究以NASArotor67轉(zhuǎn)子為算例，使用HGFS計(jì)算程序計(jì)算了5種不同間隙卜典型工作狀態(tài)的流場(chǎng)和不同節(jié)徑下氣動(dòng)阻尼。矩常計(jì)算采川周期性邊界條件單通道計(jì)算，非定常計(jì)算和顫振計(jì)算采用單排全環(huán)轉(zhuǎn)子計(jì)算。計(jì)算選用的葉尖閩隙包括實(shí)際工作葉尖W隙和0.25倍、0.5倍、0.75倍和2倍艽他葉尖間隙。顫振計(jì)算使川流固耦合法，考慮了第一階彎曲模態(tài)對(duì)振動(dòng)的影響，通過模擬葉片勾流體的相互作用判斷其氣彈穩(wěn)定性。數(shù)伉計(jì)算結(jié)果表明，過大或過小的葉尖問
2、隙都會(huì)導(dǎo)致葉片最小氣動(dòng)阻尼變小，存在一個(gè)屮闖葉尖fuj隙使氣動(dòng)阻尼最人，氣彈穩(wěn)定性最優(yōu)。關(guān)鍵詞：葉尖間隙；泄漏渦；顫振；氣動(dòng)彈性穩(wěn)定性中圖分類號(hào)：V231.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：2015040619Theinfluenceoftipclearanceonrotorfluttercharacteristics(SchoolofEnergyandPowerEngineering,Beijing100083)Abstract:Thepurposeofthispaperistousenumericalsimulationmethodtoresearchtheinfluenceoffanb
3、ladetipclearancesizeonbladefluttercharacteristics.Takingtherotor67NASArotorasanexample，theflowfieldandaerodynamicdampingof5kindsoftypicalworkingconditionsarecalculatedbyHGFSprogram.Periodicboundaryconditionsandthesinglechannelareusedforthesimulation.Theunsteadysimulationandthefluttersimulationm
4、ethodiswholebladeandsinglerow.Thetipclearanceischosentocalculateincludingtheactualworktipclearanceandtheothertipclearancesare0.25times，0.5times,0.75timesand2times.Thefluttersimulationisbasedonthefluidstructurecouplingmethod，andtheinfluenceofthefirstorderbendingmodeonthevibrationisconsidered.The
5、numericalresultsshowthat，toolargeortoosmalltipclearancewillleadtoblademinimumaerodynamicdampingsmaller.Thereexistsamiddletipclearancemakestheaerodynamicdampingmaximumandtheaeroelasticstabilityoptimal.Keywords:tipgap;leakagevortex;flutter;aeroelasticstability!收稿日期:2015-06-20論文研究方向：計(jì)算流體力學(xué)和顫振引言Wit
6、hthedevelopmentofmodernaircraftengines，aviationengineperformancepeopleputforwardhigherrequirements.Ontheonehandrequiresahighenginethrust-weightratio,lightweightcharacteristics,theenginewasmorecompactstructure;ontheotherhandrequiresanenginewithhighreliability，longlifeandlowfuelconsumptionandothe
7、rcharacteristics,resultinginfluid-inducedvibrationproblemsincreasinglybladeThemoreprominentandcomplex.Aero-enginerotorbladevibrationchatterisaself-excitedaerodynamicinstabilitycaused.Sincethefluiddomainactiontodopositiveworkonasol
