This paper presents relationships between the noise generation characteristics and the flow-field characteristics for inverted-velocity-profile coaxial jets. Noise measurements were made at four different sideline distances in order to determine the apparent noise source locations, and flow-field characteristics were determined from jet plume pressure/temperature surveys. These relationships are based on a published NASA Lewis prediction model, the basic assumptions of which are shown to be consistent with the experimental data reported herein. Improvements to the noise prediction procedure, on the basis of the present study, are included, which increase the accuracy of the high-frequency noise prediction.


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    Title :

    Effects of geometric and flow-field variables on inverted-velocity-profile coaxial jet noise and source distributions


    Contributors:

    Conference:

    American Institute of Aeronautics and Astronautics, Aeroacoustics Conference ; 1979 ; Seattle, WA


    Publication date :

    1979-03-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :