Core noise from a YF-102 high bypass ratio turbofan engine was investigated through the use of simultaneous measurements of internal fluctuating pressures and far field noise. Acoustic waveguide probes, located in the engine at the compressor exit, in the combustor, at the turbine exit, and in the core nozzle, were employed to measure internal fluctuating pressures. Spectra showed that the internal signals were free of tones, except at high frequency where machinery noise was present. Data obtained over a wide range of engine conditions suggest that below 60% of maximum fan speed the low frequency core noise contributes significantly to the far field noise.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Core noise measurements on a YF-102 turbofan engine


    Contributors:

    Conference:

    Aerospace Sci. Meeting ; 1977 ; Los Angeles


    Publication date :

    1977-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Core noise measurements on a YF-102 turbofan engine

    RESHOTKO, M. / KARCHMER, A. / PENKO, P. et al. | AIAA | 1977


    Core Noise Measurements on a YF-102 Turbofan Engine

    Meyer Reshotko / Allen Karchmer / Paul F. Penko et al. | AIAA | 1977


    Core noise measurements from a small, general aviation turbofan engine

    Reshotko, Meyer / Karchmer, Allen | TIBKAT | 1980