叶顶间隙对旋转冲压压缩转子的影响分析

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1、ABSTRACTRam·rotorisanewcompressionsystem，whichUSesthedesignofsupersonicaircraftintake，thetraditionalaxialcompressorandthecentrifugal--flowcompressor．Whatismore,ithastheadvantagesofthehighratio、lightweightandthesmallvolume．Duringthepastyears，focusingthenewcompressionsystem，alotofrese锄广chesha

2、vebeencarriedout．Theinfluenceofthetipclearanceontheram．rotorisca玎iedoutinthisarticle．Inordertoachievetheaboveobjectives，theresearchiscarriedoutasfoilows：partoneisthebasisofthenumericalresearch，itfocusesonmodelingtheram．rotorwithdifferentclearanceanddiscussingthegridindependence．Parttwomainl

3、Vconcenlstheinfluenceofthetipclearanceontheram．rotorinthedesigncondition．Pan岫concentratesontheinfluenceoftlletipclearanceontheram．rotorintheoffdesigncondition，especiallythedifferentspeedandbackpressure．Partoneisthebasisofthewholeresearch；firstlytheram．rotorwiththetipclearanceisbuiltwiththeC

4、ADsoftware．Besidesthegridindependenceresea玎chontlleram-rotorwiththetipclearancewhichistheO．5％heightofthestrakeisdiscussed．Accordingtotheresearch，theram—rotorwiththetipclearancecanbeanalyzedinthecaseofthe鲥damountatO．45million，besidesthed&ailsoftheflowfieIdcanbecaptureddistinctly．Parttwomainl

5、yfocusesonthenumericalresearchontheram．rotorwithsixkindsoftipclearance,whichisonthebasisofthepartone．Accordingtotheresearch，thesizeofthetipclearancehassignificantinfluenceontherain．rotor．Asthesizeofthetipclearanceincrease，thetotalperformanceandtheflowfieldchangeverymuch．Partthreeconcentrate

6、sontheinfluenceofthetipclearanceontherain．rotorintheoffdesigncondition，especiallyunderthedifferentspeedandbackpressure．Whatismore，thecharacteristiccurvesisobtained．Accordingtotheaboveresearch，thespeedandthebackpressureCansignificantlychangethetotalperformanceandthestructureoftheshockwave．Ke

7、yWords：Ram-Rotor；TipClearance；NumericalSimulation目录第l章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．1课题研究背景及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．2旋转冲压压缩转子研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。21．2．1国外研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2国内研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．41．3压气机叶顶间隙研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯