Technical bases for High Speed Civil Transport environmental acceptabilityUncertainties concerning atmospheric pollution, airport-community noise, and sonic booms, are the concerns of NASA's High-Speed Research Program. Current analytical predictions are of an operational regime centered on Mach 2.4/20-km altitude where the goal of 5-gm equivalent NO2 emissions/kg fuel can result in no more than 1-percent column ozone depletion. Jet-noise suppressors using a mixer-ejector device are seen as capable of furnishing substantial noise reduction. Low-boom aerodynamic configurations are under scrutiny to maximize aircraft economic performance through overland supersonic flight.
Document ID
19910069241
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wesoky, Howard L. (NASA Headquarters Washington, DC United States)
Facey, John R. (NASA Headquarters Washington, DC United States)
Shepherd, Kevin P. (NASA Headquarters Washington, DC United States)