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Effect of pressure gradients on Gortler instabilityGortler instability for boundary-layer flows over generally curved walls is considered. The full linearized disturbance equations are obtained in an orthogonal curvilinear coordinate system. A perturbation procedure to account for second-order effects is used to determine the effects of the displacement thickness and the variation of the streamline curvature on the neutral stability of the Blasius flow. The pressure gradient in the mean flow is accounted for by solving the nonsimilar boundary-layer equations. Growth rates are obtained for the actual mean flow and the Falkner-Skan flows. The results demonstrate the strong influence of the pressure gradient and the nonsimilarity of the basic flow on the stability characteristics.
Document ID
19800059976
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ragab, S. A.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Nayfeh, A. H.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1980
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 80-1377
Meeting Information
Meeting: Fluid and Plasma Dynamics Conference
Location: Snowmass, CO
Start Date: July 14, 1980
End Date: July 16, 1980
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
80A44146
Funding Number(s)
CONTRACT_GRANT: NSG-1255
Distribution Limits
Public
Copyright
Other

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