Recent advances in jet ejectors operating under static conditions have produced high thrust augmentation that is feasible for application to V/STOL flight. However, because of (a) loss in augmentation in duct flow, (b) ramjet effect, and (c) space limitations, high performance and compactness are required in the design of thrust-augmenting ejectors for V/STOL aircraft. An analytical inverse approach is presented in which the pressure distribution along the diffuser wall of an ejector is defined for a given entrance flow condition and the contour of the desired diffusor wall is determined by using a finite difference technique. The prescribed pressure distribution is first optimized by a modified Stratford criterion for incipient separation of turbulent boundary layers; this optimization makes it applicable to compressiable two-dimensional and axisymmetric flows.


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    Title :

    Analysis and design of ejector diffusor for optimum thrust


    Additional title:

    Analyse und Entwurf von Strahldiffusoren fuer die Schuboptimierung


    Contributors:
    Tai, T.C. (author)

    Published in:

    Publication date :

    1976


    Size :

    31 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English





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