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Modeling variable blowing effects in the turbulent hypersonic boundary layerStudies of the effects of variable blowing in turbulent hypersonic boundary layers are presented. Numerical calculations of the skin friction and surface heat transfer rates are compared to the experimental measurements of Holden (1990) for a slender cone at zero angle of attack in steady flows at Mach numbers of 11 and 13. An analysis of the transpiration feed system of the cone model was performed and showed that the blowing rate could be variable along the cone surface. This effect is confirmed by internal pressure measurements which were taken inside the cone model. The blowing rates are recalibrated using the internal gauge readings and used as the wall boundary condition for a compressible turbulent boundary layer calculation using the low Reynolds number k-epsilon model of Chien (1982). At low blowing rates, the boundary layer calculations indicate that a situation where both the effects of suction and blowing are present within the same flow. The results show excellent qualitative prediction of the experimental data.
Document ID
19920044476
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vanosdol, John G.
(New York, State University Buffalo, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 92-0758
Accession Number
92A27100
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-88-0223
Distribution Limits
Public
Copyright
Other

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