Acoustic and Aerodynamic Study of a Pusher-propeller Aircraft ModelNational Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990 - Propellers, Aerial - 59 pages |
Contents
CONCLUSIONS | 12 |
Inplane acoustic pressure with Ytail Vtail and Itail installed | 47 |
Upstream acoustic pressures with Ytail Vtail and Itail installed | 48 |
9 other sections not shown
Other editions - View all
Common terms and phrases
10-Foot Wind Tunnel acoustic data acoustic pressure aerodynamic airfoil ALPHA Ames Research Center angle of attack background noise blade interactions blade loading blade-passage frequency BLADE-PASSAGE HARMONIC blade-passage noise Block and Gentry broadband noise CKRS computed dB Lpc f direction dorsal fin empennage surface empennage trailing edge empennage wake empennage/propeller spacing Filotas floor reflections FORMAT 2X fuselage harmonic levels harmonic noise levels harmonics of blade-passage higher harmonics Horne and Soderman I-TAIL NO TAIL in-flow increased INPUT interac interaction noise Larrabee and French Lp f m/sec measured microphone 12 monics NASA noise decay NP+1 peller PRESSURE SIGNAL propeller blade propeller interaction propeller noise propeller tip pusher propeller radiated noise RADIUS relative ROTOR SEARS shear layer shown in figure spectra strut SUBROUTINE TAIL V-TAIL test section turbulence velocity wake deficit wake width Wilby Wind Tunnel wind turbine windspeed WRITE IPRT Y-tail