Subsonic Transport Aircraft Engine Noise PUBLIC ACCESS

[+] Author Affiliations
J. J. Kramer

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

Paper No. 68-GT-61, pp. V001T01A061; 6 pages
  • ASME 1968 Gas Turbine Conference and Products Show
  • ASME 1968 Gas Turbine Conference and Products Show
  • Washington, DC, USA, March 17–21, 1968
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7987-0
  • Copyright © 1968 by ASME


Accompanying the spectacular growth of the air transport industry is the increased frequency of exposure of airport neighbors to airplane noise. The NASA response to this problem is a two-pronged effort to reduce propulsion noise. The Langley Research Center is developing nacelle treatments to reduce engine noise radiated to the ground. The Lewis Research Center has initiated a program to demonstrate the feasibility of an engine that will produce significantly less noise than current commercial engines. This engine will be a turbofan engine with a bypass ratio in the range of 3 to 8. The considerations leading to the selection of this type engine and its cycle characteristics are discussed.

Copyright © 1968 by ASME
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