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1、ScrewCompressorsA.KovacevicN.StosicI.SmithScrewCompressorsThreeDimensionalComputationalFluidDynamicsandSolidFluidInteractionWith83FiguresAhmedKovacevicNikolaStosicIanSmithSchoolofEngineeringandMathematicalSciencesCityUniversityNorthamptonSquareLondonEC1V0HBUn
2、itedKingdomLibraryofCongressControlNumber:2006930403ISBN3-540-36302-5Springer-VerlagBerlinHeidelbergNewYorkThisworkissubjecttocopyright.Allrightsarereserved,whetherthewholeorpartofthematerialisconcerned,specificallytherightsoftranslation,reprinting,reuseofill
3、ustrations,recitation,broad-casting,reproductiononmicrofilmorinanyotherway,andstorageindatabanks.DuplicationofthisofthispublicationorpartsthereofispermittedonlyundertheprovisionsoftheGermanCopyrightLawofSeptember9,1965,initscurrentversion,andpermissionforusem
4、ustalwaysbeobtainedfromSpringer-Verlag.ViolationsareliableforprosecutionundertheGermanCopyrightLaw.Springer-VerlagisapartofSpringerScience+BusinessMedia©Springer-VerlagBerlinHeidelberg2007springer.comTheuseofgeneraldescriptivenames,trademarks,etc.inthispublic
5、ationdoesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevantprotectivelawsandregulationsandthereforefreeforgeneraluse.Cover-Design:EstudioCalamar,ViladasensTypesettingbytheauthorsandSPiPrintedonacid-freepaperSPIN:1174158962/310
6、0/SPi543210PrefaceScrewcompressorsarerotarypositivedisplacementmachines,whicharecompact,havefewmovingpartsandwhichoperateathighefficiencyoverawiderangeofspeedsandpressuredifferences.Consequentlyasubstantialproportionofallin-dustrialcompressorsnowproducedareof
7、thistype.Therearefewpublishedbooksontheprinciplesoftheiroperationandhowbesttodesignthem,especiallyinEnglish.Theauthorsmadeafirststeptofillthisvoidwithanearlierworkonmathematicalmodellingandperformancecalculationofthesemachines.Thisdescribedanalyticalprocedure
8、swhicharegenerallyade-quateformostapplications,especiallywhendealingwithoilfloodedmachines,inwhichtemperaturechangesarerelativelysmallandthustheeffectofchangesofshapeofthekeycomponentsonp
