NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Numerical-perturbation technique for stability of flat-plate boundary layers with suctionA numerical-perturbation scheme is proposed for determining the stability of flows over plates with suction through a finite number of porous suction strips. The basic flow is calculated as the sum of the Blasius flow and closed-form linearized triple-deck solutions of the flow due to the strips. A perturbation technique is used to determine the increment a(ij) in the complex wavenumber at a given location x(j) due to the presence of a strip centered at x(i). The end result is a set of influence coefficients that can be used to determine the growth rates and amplification factors for any suction levels without repeating the calculations. The numerical-perturbation results are verified by comparison with interacting boundary layers for the case of six strips and the experimental data of Reynolds and Saric for single- and multiple-strip configurations. The influence coefficient form of the solution suggests a scheme for optimizing the strip configuration. The results show that one should concentrate the suction near branch I of the neutral stability curve, a conclusion verified by the experiments.
Document ID
19860038391
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Reed, H. L.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Nayfeh, A. H.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1986
Publication Information
Publication: AIAA Journal
Volume: 24
ISSN: 0001-1452
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
86A23129
Funding Number(s)
CONTRACT_GRANT: NSG-1255
CONTRACT_GRANT: N00014-75-C-0381
Distribution Limits
Public
Copyright
Other

Available Downloads

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