Efficient mass-bleed conditions to minimize base drag are examined in consideration of various base-to-orifice-exit area ratios for a body of revolution in the Mach 2.47 freestream. Axisymmetric, compressible, mass-averaged Navier-Stokes equations are solved using the standard k-epsilon turbulence model, a fully implicit finite volume scheme, and a second-order upwind scheme. Base flow characteristics are explained regarding the base configuration as well as the injection parameter, which is defined as the mass flow rate of the bleed jet nondimensionalized by the product of the base area and freestream mass flux. The results obtained through the present study show that for a smaller base area, the optimum mass-bleed condition leading to minimum base drag occurs at relatively larger mass bleed, and a larger orifice exit can offer better drag control.


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    Title :

    Optimization of mass bleed for base-drag reduction


    Additional title:

    Optimierung des Massestroms zur Reduzierung des Heckwiderstandes von Rotationskörpern


    Contributors:

    Published in:

    AIAA Journal (online) ; 45 , 7 ; 1472-1477


    Publication date :

    2007


    Size :

    6 Seiten, 11 Bilder, 2 Tabellen, 17 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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