自动化电气自动化毕业论文英文翻译

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1、华北电力大学毕业设计（论文）附件外文文献翻译学号：姓名：所在院系：专业班级：指导教师：原文标题：NumericalanalysisofflamebehavioringasturbinecombustorsusingLES2008年月日外文文献翻译原文NumericalanalysisofflamebehavioringasturbinecombustorsusingLESJ.Shinjo,Y.MizobuchiandS.OgawaNationalAerospaceLaboratoryofJapan7-44-1Jindaiji-higashimachi,Chofu,Toky

2、o182-8522JAPANInvestigationofleanpremixedcombustiondynamicsingasturbinecombustorsisnumericallyconductedbasedonLargeEddySimulation(LES)methodology.Thetargetcombustorsareaswirl-stabilizedcombustorandaflameholdermodelcombustor.Unsteadyflamebehavioriscapturedinsidethesecombustors.Theunstablef

3、lamemotionsaremainlygovernedbyacousticresonance,velocityfieldfluctuationsandheatreleasefluctuations.Theyareallcoupledtosustaincombustioninstabilities.Velocityfieldanalysisaroundtheflameholderinthemodelcombustorisalsoconductedtounderstandlocalflameshapesforfurtherimprovementofflameholderde

4、signing.ItisdemonstratedthatnumericalmethodsbasedonLESareeffectiveincomprehendingreal-scalecombustiondynamicsincombustors.1.IntroductionReductionofNOxemissionsisakeyissueinmoderngasturbinecombustorsystemsduetoenvironmentalrequirements.Leanpremixedcombustionisonepromisingwaytoreduceemissio

5、nsbecausetheflametemperatureislowcomparedtoconventionalnon-premixedcombustion.However,leanpremixedcombustionispronetocombustioninstabilities,andthissometimesmayleadtodetrimentaldamagetocombustorsystems.Inordertoattenuateunstablecombustionbehavior,combustioncontrolisconsideredeffective.Our

6、finalgoalistoachievestablecombustionoverawiderangeofoperationconditionsbypassive/activecombustioncontrol.Towardthefinalgoalofcombustioncontrol,adetailedunderstandingofcombustiondynamicsincombustorsystemsisnecessarybecauseseveralfactorsareaffectingcombustionbehaviorinacomplicatedway.Mechan

7、ismsofcombustioninstabilitieshavebeeninvestigatedworldwidebothexperimentallyandnumerically[1,2].Incombustionexperiments,especiallyforhigh-pressuretests,measurementsareusuallydifficulttoconduct.Visualizationisinmostcaseslimitedtotwo-dimensionalimagesandsensorscanobta