NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Pressure-based real-time measurements in compressible free shear layersA preliminary experimental study has been conducted to gain insight into the temporal and spatial contents of largescale structures in a convective Mach number = 0.51 high Reynolds number planar two-dimensional compressible free shear layer. Power spectra, coherence, and space-time correlations were obtained using single- and two-point pressure measurements. Both developing and fully developed regions of the flow were investigated. The passage frequency of structures were found to be 10-15 kHz in the developing region and 4-8 kHz in the fully developed region. The convective velocity obtained from the space-time correlation in the middle of the shear layer was close to the theoretical value but varied toward the edge of the shear layer. The structures were shown to be surprisingly three-dimensional even in this low compressibility level shear layer. The structures size and spacing were also determined and discussed.
Document ID
19900055654
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Samimy, M.
(Ohio State University Columbus, United States)
Elliott, G. S.
(Ohio State Univ. Columbus, OH, United States)
Reeder, M. F.
(Ohio State Univ. Columbus, OH, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 90-1980
Accession Number
90A42709
Funding Number(s)
CONTRACT_GRANT: NAG3-764
CONTRACT_GRANT: N00014-90-J-1730
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available