Steady pressure measurements in the strap on booster interference Region of 1/20 scale ASLV configuration

Sajeer, Ahmed and Selvarajan, S and Varambally, BS and Sivaramakrishnan, AE and Pandyan, S (1987) Steady pressure measurements in the strap on booster interference Region of 1/20 scale ASLV configuration. Project Report. National Aerospace Laboratories, Bangalore.

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    Abstract

    Windˇtunnelˇstudiesˇwereˇcarriedˇoutˇtoˇobtainˇpressureˇdistribution inˇtheˇstrapˇonˇboosterˇ interferenceˇregionˇof ˇ1/20thˇscaleˇAugmented Satelliteˇ Launchˇ Vehicleˇ modelˇconfigurationˇˇTestsˇwereˇ doneˇinˇthe 1.2mˇtunnelˇatˇNALˇinˇtheˇMachˇnumberˇrangeˇofˇ0.5ˇtoˇ2.5ˇforˇthe cleanˇconfigurationˇ asˇ wellˇasˇwithˇ springˇhousingˇattachmentsˇonˇthe strapˇonˇ boostersˇ Bothˇtheˇmodelˇconfigurationsˇwithˇtheˇboosters strapped onˇtoˇtheˇcore ˇ vehicleˇinˇtheˇhorizontalˇplaneˇ ˇpitchˇˇandˇin theˇverticalˇplaneˇˇyawˇˇwereˇ testedˇforˇincidencesˇatˇ0ˇˇ4ˇandˇˇ4ˇdeg ˇ Inˇadditionˇpressureˇmeasurementsˇwereˇalsoˇdoneˇonˇtheˇcoreˇvehicle aloneˇatˇMachˇnumbersˇ2ˇ1ˇˇ2ˇ5ˇ andˇ3ˇ0ˇforˇ0ˇˇt4ˇdegreeˇincidences. The ˇˇtestˇReynoldsˇ numberˇwasˇvariedˇfromˇ0.7ˇtoˇ1.3 ˇmillionsˇbased onˇtheˇmaximumˇdiameterˇ ofˇtheˇmodel ˇ Theˇpressureˇdistributionˇshowedˇsignificantˇinterferenceˇeffects ofˇboostersˇonˇtheˇcoreˇvehicle Itˇisˇobservedˇthatˇtheˇpositiveˇpressure peakˇassociatedˇ withˇ flowˇcompressionˇatˇtheˇflareˇjunctionˇincreases withˇincreaseˇinˇMachˇnumber ˇ inˇtheˇpitchˇplaneˇ theˇnormalˇforce distributionˇremainsˇpositiveˇ alongˇtheˇcoreˇvehicleˇwhereasˇinˇtheˇyaw planeˇitˇ isˇofˇlessˇmagnitude ˇ

    Item Type: Proj.Doc/Technical Report (Project Report)
    Uncontrolled Keywords: Launch Vehicle;Steady pressure;Strap on booster; Interference region;ASLV
    Subjects: AERONAUTICS > Aerodynamics
    Division/Department: Aerodynamics, Aerodynamics, Aerodynamics, Aerodynamics, Aerodynamics
    Depositing User: Smt Bhagya Rekha KA
    Date Deposited: 03 Oct 2012 10:47
    Last Modified: 25 Jun 2013 13:49
    URI: http://nal-ir.nal.res.in/id/eprint/11042

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