A study was made to design two types of overwing nacelles for an existing wing-body at a design condition of Mach = 0.8 and C sub L = 0.2. Internal and external surface contours were developed for nacelles having either a D-shaped nozzle or a high-aspect-ratio nozzle for upper-surface blowing in the powered-lift mode of operation. The goal of the design was the development of external nacelle lines that would minimize high-speed aerodynamic interference effects. Each nacelle type was designed for both two- and four-engine airplanes using an iterative process of aerodynamic potential flow analysis. Incremental nacelle drag estimates were made for flow-through wind tunnel models of each configuration.


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    Title :

    Upper-surface blowing nacelle design study for a swept wing airplane at cruise conditions


    Contributors:
    Gillette, W. B. (author) / Mohn, L. W. (author) / Ridley, H. G. (author) / Nark, T. C. (author)

    Publication date :

    1974-09-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English