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简介:Thegasdynamicandelectromagneticfactorsaffectingthepositionofarcrootsinatubulararcheaterareanalyzed.Magnitudesofthevariousfactorsareestimatedthroughnumericalmodelling,andtheoverallactiononthearcassessed.Itisfoundthattheactionsonthearcintherearelectrodecanbebalancedinastablemannerandthearcrootcanbestabilizedatacertainaxialposition.Inthefrontelectrode,thevariousfactorscannotbebalanced,andthearerootcanonlystaywithintheelectrodethroughthemechanismofrecurrentshunting.Theseconclusionsagreewithexperimentalobservations.
简介:Inthispaper,theinfluenceofthermalperformanceofcathode-heaterassemblyofTravelingWaveTube(TWT),whichhasdifferentcontactformbetweeninnerheatshieldandsupportingcylinder,isanalyzedusingthesimulationsoftwareANSYS.Withboththermalradiationandheatconductionareconsidered,thetemperatureandheatfluxdistributionofstructureswithdifferentcontactformarecalculated,andalsostartingtimewhichisneededbeforetemperaturecomeintosteadystatus.Theresultofanalysissuggeststhatchangingthecontactformbetweeninnerheatshieldandsupportcylindercaninfluencethethermalperformanceofcathode-heaterassemblyandimproveassembly'stemperaturedistributionandpromoteheater'sheatingefficiency.Theresultofthispaperprovidestheoreticalguidanceinthedesignofcathode-heaterassembly.