A computational investigation has been conducted to study the effect and mechanisms of the passive control of a supersonic flow over a rectangular two-dimensional cavity. The passive control was included through the use of a porous surface over a vent chamber in the floor of the cavity.The passive control effectively suppressed the low-frequency pressure oscillations for the open type cavity, (length-to-depth ratio = 6.0). The mechanism for the suppression was observed to be the stabilization of the motion of the free shear layer. For the closed type cavity flow, (length-to-depth ratio = 17.5), the passive control modified the flow field to nearly that of an open type cavity flow; further the cavity drag was reduced by a factor of 4. The computational results of both cases showed good agreement with the available experimental data and the predictions of a semi-empirical formula.This study demonstrates that the passive control concept can be used to improve the aerodynamic characteristics of open and closed cavity flow fields.


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    Title :

    Passive Control of Supersonic Cavity Flowfields


    Additional title:

    Sae Technical Papers


    Contributors:
    Kim, I. (author) / Chokani, N. (author)

    Conference:

    Aerospace Technology Conference and Exposition ; 1991



    Publication date :

    1991-09-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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