资源描述：
《Shear-Based Model for Electron Transport in 2D Hybrid Hall Thruster Simulations》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、43rdAIAA/ASME/SAE/ASEEJointPropulsionConference&ExhibitAIAA2007-52088-11July2007,Cincinnati,OHShear-BasedModelforElectronTransportin2DHybridHallThrusterSimulationsMichelleK.Scharfe¤,Cli®A.Thomas¤,DavidB.Scharfe¤,NicolasGascony,andMarkA.CappellizStanfordUniversit
2、y,Stanford,CA,94305EduardoFernandezxEckerdCollege,St.Petersburg,FL,33711Anelectroncross-¯eldtransportmodelbasedoninstantaneoussimulatedplasmaprop-ertiesisincorporatedintoaradial-axialhybridsimulationofaHallplasmaaccelerator.Themodelisusedtocapturethereductionof°
3、uctuation-basedanomaloustransportintheregionofhighaxialshearoftheelectron°uid.Similartransportbarriersareobservedinthefusioncommunityduetoshearsuppressionofplasmaturbulencethroughanincreaseinthedecorrelationrateofplasmaeddies.Acomparisonismadebetweenshear-based,
4、experimental,andBohm-typemodelsforcross-¯eldtransport.Thesensitivityoftheshear-basedtransportmodelto¯ttingparametersandthetransportabilityoftheseparameterstootheroperatingconditionsareexamined.NomenclatureEElectric¯eldBMagnetic¯elduVelocitysShearrate!¿Hallparame
5、terSubscripteElectroneffE®ectiveclasClassicalnwNearwallflucFluctuationrRadialdirectionzAxialdirectionµAzimuthaldirectionI.IntroductionThefuturecapabilityofspaceexplorationisdependentonthedevelopmentofelectricpropulsionde-vices.Whilethehighthrustprovidedbychemica
6、lrocketsisnecessaryforescapefromtheEarth'sstronggravitationalpull,operationssuchassatellitestationkeepingandorbittransfercanbemoree±cientlyaccomplishedusingplasmathrusters.Also,thecontinuous,lowthrust,highspeci¯cimpulseprovidedby¤ResearchAssistant,MechanicalEngi
7、neeringDepartment,MC3032,MemberAIAA.yResearchAssociate,MechanicalEngineeringDepartment,MC3032,MemberAIAA.zProfessor,MechanicalEngineeringDepartment,MC3032,MemberAIAA.xAssociateProfessor,MathematicsandPhysics.1of10AmericanInstituteofAeronauticsandAstronauticsCopy
8、right©2007bytheauthor(s).PublishedbytheAmericanInstituteofAeronauticsandAstronautics,Inc.,withpermission.thesedevicesisofimmensevaluetomissionsofexplorationanddiscove
