The Subsonic Fixed Wing Project of NASA's Fundamental Aeronautics Program has adopted a noise reduction goal for new, subsonic, single-aisle, civil aircraft expected to replace current 737 and A320 airplanes. These so-called 'N+1' aircraft - designated in NASA vernacular as such since they will follow the current, in-service, 'N' airplanes - are hoped to achieve certification noise goal levels of 32 cumulative EPNdB under current Stage 4 noise regulations. A notional, N+1, single-aisle, twinjet transport with ultrahigh bypass ratio turbofan engines is analyzed in this study using NASA software and methods. Several advanced noise-reduction technologies are analytically applied to the propulsion system and airframe. Certification noise levels are predicted and compared with the NASA goal.


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    Title :

    Analytical Assessment of NASA's N+1 Subsonic Fixed Wing Project Noise Goal


    Contributors:
    J. J. Berton (author) / E. Envia (author) / C. L. Burley (author)

    Publication date :

    2009


    Size :

    15 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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