Acoustic design features and techniques employed in the Quiet Clean Short-Haul Experimental Engine (QCSEE) Program are described. The role of jet/flap noise in selecting the engine fan pressure ratio for powered lift propulsion systems is discussed. The QCSEE acoustic design features include a hybrid inlet (near-sonic throat velocity with acoustic treatment); low fan and core pressure ratios; low fan tip speeds; gear-driven fans; high and low frequency stacked core noise treatment; multiple-thickness treatment; bulk absorber treatment; and treatment on the stator vanes. The QCSEE designs represent and anticipated acoustic technology improvement of 12 to 16 PNdb relative to the noise levels of the low-noise engines used on current wide-body commercial jet transport aircraft.


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    Titel :

    Acoustic design of the QCSEE propulsion systems


    Beteiligte:
    Loeffler, I. J. (Autor:in) / Smith, E. B. (Autor:in) / Sowers, H. D. (Autor:in)


    Erscheinungsdatum :

    01.01.1976


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    QCSEE over-the-Wing Engine Acoustic Data

    H. E. Bloomer / I. J. Loeffler | NTIS | 1982



    QCSEE Over-the-Wing Engine Acoustic Data

    Bloomer, H. E. / Loeffler, I. J. | NTRS | 1982


    QCSEE UTW engine powered-lift acoustic performance

    Loeffler, I. J. / Samanich, N. E. / Bloomer, H. E. | NTRS | 1980


    QCSEE UTW engine powered-lift acoustic performance

    LOEFFLER, I. / SAMANICH, N. / BLOOMER, H. | AIAA | 1980