燃?xì)廨啓C(jī)冷卻預(yù)旋輸氣系統(tǒng)數(shù)值研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文燃?xì)廨啓C(jī)冷卻預(yù)旋輸氣系統(tǒng)數(shù)值研究姓名：閆磊申請學(xué)位級別：碩士專業(yè)：輪機(jī)工程指導(dǎo)教師：劉學(xué)義20090301哈爾濱下程大學(xué)碩十學(xué)位論文AbstractCoolingairpre—swirlinputsystemisthemostimportantpartofgasturbinecoolingsystemCoolingairhaslostthemostpressureinthecourseoftransportin

2、gcoolingairfromstationarycomponentstohighspeedrotatingturbinediskchannelItsfunctionistoreducethepressurelostasmoreaspossibleanddropthetemperatureofcoolingairimprovingcoolingeffectPre—swirlinputsystemmainlycomprisesthreep

3、arts：pressureregulatecavitypreswirlnozzlesandreceivechannelinturbinediskThefunctionofpressureregulatecavityistomixthecoolingairandlightenuncertainpressurewavefromcompressorPre—swirlnozzleislikestationarybladesinturbincom

4、ponentInthispart，coolingairreleaseitspressure，accelerateandchangedirectionTheangleofreceivechannelinturbinediskmustmachthedirectionofnozzleflowTherewillberapidincreaseofpressurelossifthey’renotmatchedAnefficientpreswirlt

5、ransportsystemneedstheperfectmatchofthesethreecomponents。Inthispaperacoolingairpre—swirlinputsystemofacertaintypegasturbinedomesticasoriginalmodel，usingnumericalsimulationtodescribethecharacteristicsofinsideflowtoexplore

6、thechangeofstructureinordertomakeitbetterThispaperismostlycompletethefollowingthreeaspects：1、Analysisthephysicalmodelofpre—swirlinputsystemparticularlyandfoundcalculationmodel，thenconductanappropriatesimplificationTheest

7、ablishmentofcalculationmodelhasbeennumericalsimulate，gettheentireflowfieldofpreswirlinputsystem，describeandanalyzeit2、Comparetheresultsofnumericalsimulationwiththeactualdata，identifythelimitationofthisnumericalmodelThenm

8、akeimprovements，tomakesurethatnumericalsimulateresultsclosertotheactualdata，anduseitthefoundationoftheimprovingmodels，makethenumericalsimulationmorevaluable3、Identifythemostaffectedpartofthepressurelossthroughtheflowfiel