Experiments are reported on the noise generated by model V-gutter and semicylindrical target-type reversers with circular nozzles. Nozzles were 5.24 and 7.78 cm in diameter. Nozzle pressure ratio ranged from 1.25 to 1.72. The spacing between reversers and nozzle, as well as the reverser orientation, was also varied. More noise was generated with reversers than with the nozzle alone. The measured maximum overall sound pressure level varied with the sixth power of the nozzle exit velocity. Noise levels were more uniform in regard to directivity with reversers than with the nozzle alone. It is concluded that thrust reversers, can be a significant noise problem, especially for STOL aircraft using thrust reversers during approach.


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    Titel :

    Preliminary experiments on the noise generated by target-type thrust reverser models


    Beteiligte:
    Gutierrez, O. A. (Autor:in) / Stone, J. R. (Autor:in)

    Erscheinungsdatum :

    01.05.1972


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


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    Results from cascade thrust reverser noise and suppression experiments

    GUTIERREZ, O. / STONE, J. / FRIEDMAN, R. | AIAA | 1974