The thrust augmentation, lift augmentation, and noise reduction characteristics of compact ejectors make them potentially attractive for propulsion lift systems; however, in the past, poor thrust augmentation results have negated the other benefits. A synthesis of an ejector's internal flow phenomena developed in this paper indicates that improved mixing and diffusion can significantly increase thrust augmentation. Experiments with an ejector employing a 'hypermixing' primary nozzle confirm the analytical model's augmentation predictions and show reasonable agreement with other predicted flow characteristics. The two-dimensional primary nozzle has its slot-shaped exit throat divided into alternating segments that impart left and right deflections to the primary flow to accelerate mixing. (Author)


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    Title :

    Low-Area Ratio, Thrust-Augmenting Ejectors


    Contributors:

    Publication date :

    1971


    Size :

    7 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Low-Area Ratio, Thrust-Augmenting Ejectors

    RICHARD B FANCHER | AIAA | 1972




    Thrust Augmenting Ejectors

    H. Viets | NTIS | 1975