基于正交法的篦齒封嚴(yán)結(jié)構(gòu)的傳熱特性研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文基于正交法的篦齒封嚴(yán)結(jié)構(gòu)的傳熱特性研究姓名：帥海山申請學(xué)位級別：碩士專業(yè)：熱能工程指導(dǎo)教師：吉洪湖201012基于正交法的篦齒封嚴(yán)結(jié)構(gòu)的傳熱特性研究iiAbstractLabyrinthsealsareasimpletraditionalnoncontactstructurewithreliableperfmance.Buttherearemanyimpactfactsoftheflowheattransfe

2、racteristicssuchasthelabyrinthstructuregeometricparametersspeedimptexptcompressionratiotheairtemperaturepressure.Fromtheliteratureanalysisthespeedhadnosignificanteffectonleakageacteristicsespeciallyinthecaseofasmallspeed

3、.Generallythelabyrinthsealgapwidthcismuchsmallerthantherotatingradiusr.asmallarcofacircularflowcanbeapproximatedasarectangularchannel.Thentheleakageacteristicsareclosewithsmalldifference.Sowecaneasilyadjustthegapwidthwit

4、houtreplacingthetestpiecessignificantlyreducingthecostscycleofthetests.Thusindertogetthebasicrulesofdesigncriteriathecrespondingrelationshipontheflowheattransferacteristicsofsingleinfluencingfactsofthelabyrinthsealsinaer

5、oenginefinallypopulatethedatabasefthelabyrinthsealdatainthecourseofthisstudycarriedoutfdifferentfactsresearchcanbedividedintotwoparts:Firstlytwodimensionalstationaryheattransfertestrigweredesignedtoexperimenttheinfluence

6、onthelawofriggeometryparametersSecondlytherimsealswereresearchedontheeffectofspeedsizeofwindresistance.Fthestudytwodimensionalheattransfertestrigdevelopedaschemeofresearchprograminreasonableuseofthogonal.After25represent

7、ativeexperimentsweredrawnfromthe15625tests25testpiecesweredesigned.Undertheguidanceofthesimilaritytheytheuseofnumericalsimulationmethodwecompletedthetestsizeoftheconcretestructuredesign.Thendrawingthedrawingsmanufacturin

8、gassemblytestingistoensuretheaccuracyofthetestbed.Thusitensuredtheveracitytrustinessoftestresults.Duringtheexperimenttomeasurethevariousparametersaseriesofexperimentaldataobtained.Amethodwiththecombinationoftestnumerical

9、wasdeveloped.aftertheywerecarriedoutbythogonaltestresultspostprocessingasetofmethodsftheoptimizationofsealstructureissummedup.Thenweobtainedanempiricalfmulaunderexperimentalconditionsabouttheleakageheattransferacteristic

10、sbyleastsquares.Itwillprovideguidancebasisfthedesignoflabyrinthsealsinthefuture.Frimsealswecarriedouttheleakageheattransferacteristicsfromthenumericalcalculation.Theflowfieldtemperaturefieldwereobtained.wehavereceivedthe

11、leakageheattransferacteristicsoftheinfluencinglawsofspeed.Especiallyfthemodelcwehavesimulatedtheeffectofthewindresistanceofthesecondaryflow.Dragcoefficientwiththevariationofspeedwasobtained.Keywds:labyrinthsealheattransf