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ResearchonTransonicWindTunnelTestsofMarsDisk-Gap-BandParachutes

GAOShuyi1,2 GESicheng2 LIANGYan2   

  1. (1NationalKeyLaboratoryofNorthwesternPolytechnicalUniversity,Xi′an710072)
    (2BeijingInstituteofSpaceMechanics&Electricity,Beijing100094)
  • Received:2015-02-06 Revised:2015-05-12 Online:2015-08-25 Published:2015-08-25

Abstract: IntheMarsentrydeceleratelandingprogram,theparachuteisakeyinstrumentoftheaerodynamicdeceleratorsystem.BecauseoftheparticularityoftheMarsatmosphere,theparachuteusedfortheMarsmissondeploysunderthesupersonic,lowdensity,lowdynamicpressureconditions.SotheconstructionandsizingoftheMarsparachuteismuchimportant.TheMarsparachutetechnologywasinvestigatedandanalyzedbyfourtypesofparachute,consideringthediskbandarearatioandporosityofthecanopymaterial.Todeterminethedragandstaticstabilityofthevarioustypesofdisk-gap-bandparachutemodel,theMarsparachutetransoniccharacteristicstestinChinawasfirstlyconducted.Thefronttrussandwindtunnelbalancewasusedtomeasuretheaxisforceontheparachutemodel,andthephotographywasusedtoobservetheangleofattackoftheparachute.Thetestresultsshowthat,thetransonicdragcoefficientofthedisk-gap-bandparachuteaccordswiththetheoreticaloneandcansatisfytheMarsmissionrequirements.Itisalsoobservedthatthereductionofstabilityofthedisk-gap-bandparachuteisaccompaniedbytheincreasingofthedragperformance.

Key words: Entrydecelerate, Disk-gap-bandparachute, Transonic, Windtunneltests, Marslander