The topics covered include the following: 20 dB jet noise suppression; ejector nozzle technology program - noise reduction vs. flow augmentation; mixer ejector nozzle technology challenges; 1989 High Speed Civil Transport (HSCT) 2-D ejector model test in NASA's 9 x 15 ft. tunnel; tertiary airflow 1989 2-D ejector test; shock noise dominates 2-D ejector test; lessons learned - 2-D mixer/ejector in 9 x 15 ft. tunnel; 1990 HSCT axisymmetric ejector model test in Boeing's Low Speed Aeroacoustic Facility (LSAF); axisymmetric mixer/ejector mach contours - peak and valley - NASTAR pre-test predictions; tertiary airflow objectives accomplished - 1990 AXI model; and HSCT low noise exhaust technology programs.
HSCT Nozzle Source Noise Programs at Pratt and Whitney
1992
15 pages
Report
Keine Angabe
Englisch
Aircraft , Aerodynamics , Noise Pollution & Control , Acoustics , Aeroacoustics , Aerodynamic noise , Jet aircraft noise , Noise reduction , Research projects , Supersonic nozzles , Supersonic transports , Wind tunnel tests , Air flow , Ejectors , Low noise , Low speed , Mach number , Shock waves , Two dimensional models
HSCT nozzle source noise programs at Pratt and Whitney
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