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Effect of bulges on the stability of boundary layersThe instability of flows around hump and dip imperfections is investigated. The mean flow is calculated using interacting boundary layers, thereby accounting for viscous/inviscid interaction and separation bubbles. Then, the two-dimensional linear stability of this flow is analyzed, and the amplification factors are computed. Results are obtained for several height/width ratios and locations. The theoretical results have been used to correlate the experimental results of Walker and Greening (1942). The observed transition locations are found to correspond to amplification factors varying between 7.4 and 10.0, consistent with previous results for flat plates. The method accounts for both viscous and shear-layer instabilities. Separation is found to increase significantly the amplification factor.
Document ID
19880047702
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nayfeh, Ali H.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Ragab, Saad A.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Al-Maaitah, Ayman A.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1988
Publication Information
Publication: Physics of Fluids
Volume: 31
ISSN: 0031-9171
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
88A34929
Funding Number(s)
OTHER: N00014-85-K-0011
CONTRACT_GRANT: NAG1-714
PROJECT: NR PROJECT 4325-201
Distribution Limits
Public
Copyright
Other

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