Accession Number : AD0436674


Title :   Wall-Pressure Fluctuations and Pressure -Velocity Correlations in Turbulent Boundary Layers


Corporate Author : ADVISORY GROUP FOR AERONAUTICAL RESEARCH AND DEVELOPMENT PARIS (FRANCE)


Personal Author(s) : Serafini, John S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/436674.pdf


Report Date : Apr 1963


Pagination or Media Count : 81


Abstract : Pressure fluctuations of a turbulent layer along a plane boundary were investigated. All measurements were made at a nominal free-stream Mach number of 0.6 and an average Reynolds number per foot of 3.45 x 10 to the 6th power in a wind-tunnel facility specially designed for the purpose. The pressure fluctuations were measured with miniature pressure transducers and the velocity fluctuations with hot-wire anemometers. The rootmean-square magnitudes of the wall-pressure fluctuations agree with the Lilley-Hodgson theoretical results, whereas the mean-square spectra do not agree, except over a small range of frequencies. Measurements of the correlations of the wall-pressure fluctuations with the longitudinal component of the velocity fluctuations indicate that the contributions to the wall-pressure fluctuations are from two regions, an inner region near the wall and an outer region linked with the intermittency.


Descriptors :   *AIRCRAFT NOISE , AIRCRAFT PANELS , DISTRIBUTION , EXPERIMENTAL DATA , NOISE , OSCILLATION , TRANSDUCERS , TURBULENT FLOW , VELOCITY


Subject Categories : Air Breathing Engines(unconventional)


Distribution Statement : APPROVED FOR PUBLIC RELEASE