A fan module was developed using an existing turboshaft engine. The fan was designed using the latest in large engine noise control technology. A mixer was added to reduce the already low exhaust gas velocity. A nacelle incorporating sound treatment was provided for the test engine. A noise prediction model was used through the design process to evaluate the various design alternatives. Acoustic tests were then made to verify the prediction and identify the noise characteristics of the fan, core, jet, and sound treatment. Analysis of the recorded data yielded close agreement with the expected results. Core noise, as was expected, was the predominant source of noise for the quiet clean general aviation turbofan (QCGAT) engine. Flyover noise predictions were made which indicated that the Avco Lycoming QCGAT engine would meet the goals set for the QCGAT program.


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    Titel :

    Avco Lycoming quiet clean general aviation turbofan engine


    Beteiligte:
    Wilson, C. A. (Autor:in)


    Erscheinungsdatum :

    01.03.1980


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Avco Lycoming Division

    Emerald Group Publishing | 1974


    Measured and predicted noise of the AVCO-Lycoming YF-102 turbofan engine

    CLARK, B. / MCARDLE, J. / HOMYAK, L. | AIAA | 1979


    Avco Lycoming/NASA contract status

    Duke, L. C. | NTRS | 1976