渦輪葉尖間隙主動(dòng)控制機(jī)匣內(nèi)部流動(dòng)與換熱特性研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文渦輪葉尖間隙主動(dòng)控制機(jī)匣內(nèi)部流動(dòng)與換熱特性研究姓名：?jiǎn)虅ι暾?qǐng)學(xué)位級(jí)別：碩士專業(yè)：工程熱物理指導(dǎo)教師：毛軍逵201012AbstractTurbinetipcle甜ancecontrolhaSsignificantinfluencesonincreasingtheturbinee偉ciencyanddecreaSingthespecificfuelconsumptionoftheaero—engineNowad

2、aysturbinetipclearanceactiVecontloltechnologyhasbecomeoneofthemosttypicaltechnologiesonhighperformancecommercialenginesNumericaIsimulationsandexpermentswereappliedonahighpressureturbinecasetodosomeb嬲icanalysisonthenowstr

3、ucture，resistancecharateristics，temperatureandheattransfercoefhcientinsidetheturbinecaseTheflowandheattransferch剮racteristicsoftheturbinecasewerespecificallystudiedwhenthea119leallddiameteroftheimpingementholeschangedThe

4、numericalsimulationonthewholeturbinec硒eshowedthat，theflowbec姍ewallslipmoVementaRerreachingtheimpingementplate，whichwaSacceleratedthroughtheimpingementholesandreachedtheturbinecaSewanlaterAtlaLstthenowleRthecaseaReritwent

5、throughtheg印betvv7eentheimpingementplatewingsaIldtheribItwaSalsoconcludedthattheimpingementformedsomeheat訂孤sferstren舀henedregionsontherib，andtheheatnansferinthegapwasimproVedt00Asairnowinga10ngthetvvoentrances，thetempera

6、tureoftheinsidewallbecamehigherandtheheatt啪sfercOefficiembecamelOwerAt90。frOmtheentrance，thefIowwaSalmOststagnatedandtheheattransfertherewaSt1eweal(estWhatelse，aSthem弱snowrateincreaSed，thenowspeedandtotalpressurelossbeca

7、IIlehigher，andthelocalandaVerageheattransferc印abilityw嬲enllancedBaSedontherese∽hofthewholec硒e，f|unhernumericalresearChw弱conductedonthetypicalheattransferelementinthisp印erIntheresearch，theimpingementholedianleter(1mm，15mm

8、and2mm)，angIe(30。，45。，60。)andtheangularspacing(thefirStrow1125。／225。／45。，thesecondrow107。／214。／428。，thethirdmw1125。／225。，45。)werechangedtoanalyzemelocalandaVerageheat仃ansfercoemcientofthespecificribAndthetotalpressure10s

9、sw雒alsocOmpafedTheresultSreVealedthatthepressure10ssandtheheattransfercoe硒cientdecre舔edwiththeincreaSeoftheimpingementhoIedi踟eterChangingtheimpin即mentanglehaSoppositee毹ctSbet、veentheaVerageheat仃繃sfercoefficientofthemandt

10、heoneoftheturbinecaSewallBaSedoncomprehensivecOnsideration0nthetotalpressurelossandtheheattransferstren舀hening，itispreferredthattheimpingementhoIeshaVea45。礬gleanda15mmdiaIneterThenowandheattransfercharacteristicsofthetyp