AFAPL TR-74-24, TECHNICAL REPORT: THE GENERATIONAL AND RADIATION OF SUPERSONIC JET NOISE - A PROGRESS REPORT ON STUDIES OF JET NOISE GENERATION AND RADIATION, TURBULENCE STRUCTURE, AND LASER VELOCIMETRY (JUN-1974)

AFAPL TR-74-24, TECHNICAL REPORT: THE GENERATIONAL AND RADIATION OF SUPERSONIC JET NOISE - A PROGRESS REPORT ON STUDIES OF JET NOISE GENERATION AND RADIATION, TURBULENCE STRUCTURE, AND LASER VELOCIMETRY (JUN-1974)., This progress report summarizes the major theoretical and experimental efforts performed during the first yeai: of a two-year program sponsored by the Air Force and the Department of Transportation on the Generation and Radiation of Supersonic Jet Noise. Specific technical results are presented in the following areas: (1) the radiation of sound sources in a jet shear layer, as described by Lilley\'s theory of jet noise generation, (2)a theoretical study of the large scale noise producing structure of jets, (3)the design, construction and calibration of a high temperature anechoic facility for jet noise experiments, (4)a series of high temperature subsonic and supersonic jet noise experiments and the analysis of data from these experiments and (5)the design and development of a laser velocimeter for the measurement of mean flow velocity and orthogonal components of turbulence velocity with turbulence spectra, intensity, and correlations as standard outputs.