Accession Number : AD0699657

Title :   AERODYNAMIC NOISE,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Ribner,H. S.

Report Date : 1969

Pagination or Media Count : 451

Abstract : Contents: Jets and Noise; The development of engineering practices in jet, compressor, and boundary layer noise; Scales pertinent to noise generation from a jet; Estimation of the intensity of noise radiated from a subsonic circular jet; General method for calculating the sound pressure field emitted by stationary or moving jets; Jet noise at very low and very high speed; An investigation of the near noise fields of a choked axi-symmetric air jet; Noise from underexpanded axisymmetric jet flows using radial jet flow impingement; The response of a simple panel to the pseudo-sound field of a jet; Atmospheric absorption of noise; Attenuation of sound in soft-walled circular ducts; Flow perturbations generated by a shock wave interacting with a entropy wave; Trends in boundary layer noise research; A review of the sound-generating mechanisms in aircraft-engine fans and compressors; Discrete noise generation and propagation by a fan engine; A theoretical study of helicopter rotor noise; A study of propeller noise research; Review of sonic boom theory; Recent results of sonic boom research; Sonic bang simulation by explosives; Second-order wave structure--planar flows; and Lifting aerodynamic configurations with no sonic boom.

Descriptors :   (*AERODYNAMIC NOISE, *SYMPOSIA), JETS, BOUNDARY LAYER, AXIALLY SYMMETRIC FLOW, PRESSURE, IMPACT, PANELS, ATMOSPHERES, DUCTS, SHOCK WAVES, AIRPLANE ENGINE NOISE, PROPELLER NOISE, SONIC BOOM, CANADA

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE