Experimental wind tunnel tests, conducted to reproduce the base flow past a space launcher during early ascent fight conditions, were numerically simulated by solving the steady Reynolds-averaged Navier–Stokes equations using two different versions of the Spalart–Allmaras model. The launcher model consisted of a cylinder with a circular cross section, an ogival nose, and a centered nozzle that issued a supersonic cold jet embedded in the external subsonic stream. A comparative analysis of the data obtained from the steady-state simulations and from the experimental tests indicated that the launcher base pressure was closely related to the turbulent shear stresses within the jet mixing layer; therefore, accurate modeling of the compressibility effects in the turbulent mixing layer plays an important role in improving the base drag estimates provided by the numerical simulations.


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    Title :

    Turbulence Modeling of Base Drag on Launcher in Subsonic Flight


    Contributors:

    Published in:

    Publication date :

    2014-09-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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    R.C. Blanchard / W.P. Phillips / G.M. Kelly et al. | AIAA | 1982



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    Paciorri, R. / Sabetta, F. / Valenza, F. et al. | AIAA | 2013


    Subsonic induced drag

    SANDERS, K. L. | AIAA | 1965