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Noise reduction potential of large, over-the-wing mounted, advanced turbofan engines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Berton, Jeffrey J. |
| Copyright Year | 2000 |
| Description | As we look to the future, increasingly stringent civilian aviation noise regulations will require the design and manufacture of extremely quiet commercial aircraft. Indeed, the noise goal for NASA's Aeronautics Enterprise calls for technologies that will help to provide a 20 EPNdB reduction relative to today's levels by the year 2022. Further, the large fan diameters of modem, increasingly higher bypass ratio engines pose a significant packaging and aircraft installation challenge. One design approach that addresses both of these challenges is to mount the engines above the wing. In addition to allowing the performance trend towards large, ultra high bypass ratio cycles to continue, this over-the-wing design is believed to offer noise shielding benefits to observers on the ground. This paper describes the analytical certification noise predictions of a notional, long haul, commercial quadjet transport with advanced, high bypass engines mounted above the wing. |
| File Size | 1103216 |
| File Format | |
| Language | English |
| Publisher Date | 2000-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Engine Design Bypass Ratio Engine Noise Noise Reduction Aircraft Noise Noise Prediction Aircraft Turbofan Engines Aircraft Design Thermodynamic Cycles Commercial Aircraft Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
