Hydrodynamic and thermal measurements in a turbulent boundary layer recovering from concave curvature

Michael D. Kestoras, Terrence W. Simon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The behavior of a boundary layer on a flat wall, downstream of sustained concave curvature is documented. Experiments are conducted with negligible streamwise pressure gradient and a low free-stream turbulence intensity (0.6%). The turbulent boundary layer has a moderate strength of curvature (δ/R=0.024) at the entry to the recovery section. Results show that the skin friction coefficient, which increases over the concave wall, decreases rapidly at first over the recovery wall, then slowly approaches flat-wall values. Stanton number values decrease rapidly, undershooting expected flat-wall values. A discussion of this behavior, supported by profile measurements, is given. Effects include destabilization in the concave-curved flow and rapid streamline readjustment (acceleration) at the end of the curved section. Goertler vortices established on the curved wall persist onto recovery wall, however their effects weaken.

Original languageEnglish (US)
Title of host publicationHeat Transfer in Gas Turbine Engines - 1991
PublisherPubl by ASME
Pages29-35
Number of pages7
ISBN (Print)079180853X
StatePublished - Dec 1 1991
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
Duration: Dec 1 1991Dec 6 1991

Publication series

NameAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume188
ISSN (Print)0272-5673

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAtlanta, GA, USA
Period12/1/9112/6/91

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