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一种控制微涡轮叶尖泄漏流的新技术(英文).docx

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一种控制微涡轮叶尖泄漏流的新技术(英文) Title:ANovelTechnologyforControllingMicroturbineTipLeakageFlow Abstract: Microturbinesarewidelyusedinvariousindustriesascompactandefficientpowersources.However,theleakageflowbetweentherotorandstatorinmicroturbines,knownastipleakageflow,significantlyaffectstheiroverallperformanceandefficiency.Thispaperpresentsanoveltechnologyforcontrollingmicroturbinetipleakageflowthroughpassiveandactivemethods.Theproposedtechnologyaimstoimprovetheturbine'soverallefficiencybyreducingleakagelosses,optimizingenergyextraction,andenhancingpoweroutput. Introduction: Microturbinesplayavitalroleinmanyapplications,includingpowergeneration,gasturbines,automotiveengines,andaerospacepropulsionsystems.Thesecompactpowergenerationdevicesareknownfortheirhighpower-to-weightratio,lowemissions,andoverallenergyefficiency.However,oneofthekeychallengesinmicroturbinedesignisminimizingthetipleakageflowthroughtherotor-statorinterface,whichcanleadtosignificantenergylossesandreducetheturbine'sperformance. 1.TipLeakageFlowAnalysis: Thefirststepindevelopingeffectivecontroltechniquesfortipleakageflowistounderstandtheunderlyingmechanismsandflowcharacteristics.Thissectionprovidesananalysisoftipleakageflowphenomena,includingtheformationofvortices,leakagepaths,andleakagelosses.Theeffectsoftipclearance,Reynoldsnumber,andbladegeometriesonleakageflowarealsodiscussed. 2.PassiveControlTechniques: Passivecontrolmethodsdonotrequireanyexternalpowerinputandrelyonthedesignmodificationstoredirectorrestricttheleakageflow.Thissectionexploresvariouspassivecontroltechniques,suchasnon-uniformtipclearance,squealers,tipcap,andcasingtreatments.Theadvantages,limitations,andtheunderlyingphysicsofthesetechniquesarediscussedindetail. 3.ActiveControlTechniques: Activecontroltechniquesinvolvetheuseofactuatorstomanipulatetheflowfieldandmitigatetipleakagelosses.Inthissection,differentactivecontrolmethods,includingtipinjection,tipsuction,andbladetipblowing,areexplained.Theutilizationofsyntheticjetactuators,piezoelectricmat