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 empirically applied to the propulsion system and airframe. Certification noise levels are predicted and compared with the NASA goal.
An Analytical Assessment of NASA's N(+)1 Subsonic Fixed Wing Project Noise Goal
15th AIAA/CEAS Aeronautics Conference (30th AIAA Aeronautics Conference) ; 2009 ; Miami, FL, United States
2010-02-01
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Overview of the CESTOL Partnership in NASA's Subsonic Fixed Wing Project
British Library Conference Proceedings | 2008
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