Book of Proceedings, Volume 1 |
Common terms and phrases
acoustic aerodynamic aircraft airfoil altitude amplitude analysis anechoic chamber angle axial band blade blade-vortex interaction Blown Flap boundary characteristics coaxial component configurations convection correlation CORRELATION FUNCTION cross-correlation curve density diameter direction distance downstream effect equation experimental experiments Figure flight flow field fluctuations Fluid function harmonic helicopter helicopter rotors high frequency increase isotach jet axis Jet Engine Jet Flap jet noise Lighthill linear Lowson Mach number measurements mechanism mixing layer Mixing Region NASA noise measurements noise radiation noise source normal nozzle exit obtained overpressure parameters plane predicted propagation range ratio reduced reverberation chamber Ribner Rotor Noise scale shear shown in Fig signal slot nozzle sonic boom sound field sound power sound pressure level sound speed spectra spectrum static pressure STOL subsonic surface theory tion turbulence unsteady V/STOL velocity vortex vorticity