This paper summarizes the results of an experimental investigation on the noise generated by target-type thrust reversers. The experimental data are normalized and scaled up to sizes suitable for reversing the core jets of a 45,400-kg augmentor-wing-type STOL airplane. The scaling calculatings yield perceived noise levels well above the 95-PNdB design goal for both sideline and flyover at 152.5 m. V-gutter and semicylindrical reversers were tested with a 5.24-cm-diameter circular nozzle, and a semicylindrical reverser was also tested with a 7.78-cm-diameter circular nozzle. Other test variables were the spacing between nozzle and reverser, reverser orientation, and nozzle pressure ratio. The thrust reversers, in addition to being noisier than the nozzle alone, also had a more uniform directivity.


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    Title :

    Noise generated by STOL core-jet thrust reversers.


    Contributors:

    Conference:

    American Institute of Aeronautics and Astronautics, Aircraft Design, Flight Test, and Operations Meeting ; 1972 ; Los Angeles, CA


    Publication date :

    1972-08-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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