A low speed wind tunnel was used to evaluate the inflight aeroacoustic performance of several single- and multiple-passage sonic inlets. Takeoff and approach geometries were tested, and the effects of inlet lip and diffuser design were determined. Results indicate that the single passage geometries, in particular a cylindrical centerbody takeoff geometry and a bulb shaped centerbody approach geometry, provide the highest level of aeroacoustic performance. Increasing inlet lip contraction ratio extends the maximum incidence angle for attached lip flow, while increasing inlet diffuser length results in higher total pressure recovery for a given amount of noise suppression.


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    Titel :

    Aeroacoustic performance of scale model sonic inlets


    Beteiligte:
    Abbott, J. M. (Autor:in)

    Kongress:

    13th Aerospace Sci. Meeting ; 1975 ; Pasadena, CA, United States


    Erscheinungsdatum :

    01.01.1975


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch