›› 2016, Vol. 36 ›› Issue (2): 74-.doi: 10.16708/j.cnki.1000-758X.2016.0026

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Effectofdivergingvariablecrosssectionchannelonperformanceofacuspedfieldthruster

CHEN  Peng-Bo, LIU  Hui, HU  Peng, SUN  Qiang-Qiang, YU  Da-Ren   

  1. PlasmaPropulsionLaboratory,HarbinInstituteofTechnology,Harbin150001,China
  • Received:2015-12-10 Revised:2016-01-08 Online:2016-04-25 Published:2016-02-24

Abstract: Theadaptabilityofcuspedfieldthrusterchangeswithdifferentoperatingconditions,especiallywithdifferentefficiencies,whichchangesalotatdifferentgasflowrates.Toovercomethisproblem,adivergingvariablecrosssectionchannelwasproposedtoimprovetheperformanceofcuspedfieldthrustersatlowandmiddlegasflowrate.Meanwhile,twoconstantsectionchannelswithabigdiameteranda  smalldiameterrespectivelywereintroducedtobecomparedwiththedivergingchannel.Althoughthedivergingchannelmaycausealittledeclineintheatomdensitycomparedtothesmall  constantsectionchannel,thedivergingchannelimprovestheefficiencyatbothlowandmiddlegasflowratesonthepremiseofprovidingaconsiderablethrust,becauseitdecreasestheenergylossofionsatexitandpromotesionizationbyimprovingthemagneticmirrorratio.Incomparison,boththebigconstantsectionchannelandthesmallconstantsectionchannelhavelowperformancesduetoalowerdensityofgasandabiggerwallloss.Therefore,adivergingchannelisbeneficialtoimprovingtheperformanceofacuspedfieldthrusteratlowandmiddlegasflowrate.

Key words: cuspedfieldthruster, divergingchannel, lowandmiddlegasflowrate, directsimulationMonteCarlo