Drag reduction of afterbodies by controlled separated flows - Generic study AIAA Paper 99-0274

Viswanath, P. R (1999) Drag reduction of afterbodies by controlled separated flows - Generic study AIAA Paper 99-0274. In: 37th AIAA Aerospace Sciences Meeting and Exhibit, January II-14,1999, Reno, NV.

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    Abstract

    The zero-lift drag characteristics of Generic MultiStep Afterbodies, which utilize the concept of controlled separated flows, have been documented at transonic and supersonic speeds for the first time. The important geometrical and flow parameters affecting the drag of such afterbodies have been identified and their effects have been examined through a systematic parametric study. The results show conclusively that optimized multistep afterbodies can provide significant total drag reduction compared to (unmodified) blunt bases; however, compared to axisymmetric boat-tailed afterbodies of a given base area, the multistep afterbodies have relatively higher drag. The results also provide guidelines useful for the design of multistep afterbodies relevant to projectile and missile applications. Finally, the important flow features involving separation and reattachment on multistep afterbodies are discussed based on flow visualization studies.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Drag Reduction;Afterbodies;Separated Flow;Flow Control Turbulent Flowbase Flow13; 13;
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Experimental Aerodynamics Division
    Depositing User: Mr. N A
    Date Deposited: 28 Jan 2006
    Last Modified: 24 May 2010 09:39
    URI: http://nal-ir.nal.res.in/id/eprint/993

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