Direct Drag Measurements On Two LCA- Related Afterbodies Using The Jet Simulation Rig

Vishwanath, PR and Patil, SR and Verma, RS (1996) Direct Drag Measurements On Two LCA- Related Afterbodies Using The Jet Simulation Rig. Technical Report. NAL, Bangalore.

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    Abstract

    Results Of Zero-Lift Drag Characteristics On Two LCA-Related Afterbodies Employing The Jet Simulation Rig Are Reported.One Of The Afterbodies Was an axisymmetric Configuration Relevant To LCA Kaveri Engine And The Other Involved A Three-Dimensional Boat-Tailing Concept Leading To A Square Base ; The Annular Base Area To (Max) Forebody Cross-Sectional Area Was 0 .23 For Both Afterbody Configurations . The Tests Were Made At Freestream Mach Numbers Of 0 .80 And 0 .96 And Covered A Jet Pressure Ratio Of 1 .5 To 5 .0 The Results Show That, While The Total Drag Levels For The Two Afterbodies Are Comparable At MO.= 0 .80, The Drag Of The Square Base Afterbody Is Appreciably Lower (About 20%) Relative To The Axisymmetric Case At Ao 0 .96 . Certain Broad Features Of The Flow On Square Base Afterbodies Are Discussed As Well.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Afterbody Drag; Jet Simulation Rig
    Subjects: ASTRONAUTICS > Astronautics (General)
    Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division, National Trisonic Aerodynamic Facility
    Depositing User: M/S ICAST NAL
    Date Deposited: 24 Aug 2012 09:59
    Last Modified: 24 Aug 2012 09:59
    URI: http://nal-ir.nal.res.in/id/eprint/10785

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