Rhis 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 relation ships 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. (Posamentier)


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    Title :

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


    Additional title:

    Wirkung der geometrischen und stroemungsbedingten Kenngroessen auf Duesen mit umgekehrtem Geschwindigkeitsprofil und auf die Schallwellenausbreitung


    Contributors:

    Published in:

    Publication date :

    1979


    Size :

    21 Seiten, 21 Bilder, 18 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English