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Distortion of a flat-plate boundary layer by free-stream vorticity normal to the plateA nominally uniform flow over a semiinfinite flat plate is considered. The analysis shows how a small streamwise disturbance in the otherwise uniform flow ahead of the plate is amplified by leading-edge bluntness effects and eventually leads to a small-amplitude but nonlinear spanwise motion far downstream from the leading edge of the plate. This spanwise motion is then imposed on the viscous boundary-layer flow at the surface of the plate - causing an order-one change in its profile shape. This ultimately reduces the wall shear stress to zero, causing the boundary layer to undergo a localized separation, which may be characterized as a kind of bursting phenomenon that could be related to the turbulent bursts observed in some flat-plate boundary-layer experiments.
Document ID
19920053719
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Goldstein, M. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Leib, S. J.
(NASA Lewis Research Center Cleveland; Sverdrup Technology, Inc., Brook Park, OH, United States)
Cowley, S. J.
(Cambridge, University United Kingdom)
Date Acquired
August 15, 2013
Publication Date
April 1, 1992
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 237
ISSN: 0022-1120
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
92A36343
Distribution Limits
Public
Copyright
Other

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