Theoretical analyses of generalized flow induction were carried out which showed that the least dissipative mode of flow induction is the cryptosteady mode. Studies were carried out on the energetics of vortex formation showing that in pulsatile thrust augmentors, considerable energy is carried away as kinetic energy of rotation. Parametric studies were conducted on rotary-jet thrust augmentation yielding a best thrust augmentation of 1.97. Theoretical and experimental studies on the utilization of propagating stall were conducted. The promise of eliminating moving parts for the rotary-jet thrust augmentor was explored and parametric testing was conducted to establish conditions for obtaining stall. Experiments showed, however, that stall is relatively difficult to obtain in configurations compatible with the rotary jet thrust augmentor.


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    Title :

    Flow Induction by Rotary Jets


    Contributors:
    C. A. Garris (author) / J. V. Foa (author)

    Publication date :

    1986


    Size :

    30 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Flow induction by rotary jets.

    HOHENEMSER, K. H. | AIAA | 1966