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Compressible stability of growing boundary layers using parabolized stability equationsThe parabolized stability equation (PSE) approach is employed to study linear and nonlinear compressible stability with an eye to providing a capability for boundary-layer transition prediction in both 'quiet' and 'disturbed' environments. The governing compressible stability equations are solved by a rational parabolizing approximation in the streamwise direction. Nonparallel flow effects are studied for both the first- and second-mode disturbances. For oblique waves of the first-mode type, the departure from the parallel results is more pronounced as compared to that for the two-dimensional waves. Results for the Mach 4.5 case show that flow nonparallelism has more influence on the first mode than on the second. The disturbance growth rate is shown to be a strong function of the wall-normal distance due to either flow nonparallelism or nonlinear interactions. The subharmonic and fundamental types of breakdown are found to be similar to the ones in incompressible boundary layers.
Document ID
19910058941
Document Type
Conference Paper
Authors
Chang, Chau-Lyan (High Technology Corp. Hampton, VA, United States)
Malik, Mujeeb R. (High Technology Corp. Hampton, VA, United States)
Erlebacher, Gordon (High Technology Corp. Hampton, VA, United States)
Hussaini, M. Y. (NASA Langley Research Center; ICASE Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 91-1636
Funding Number(s)
CONTRACT_GRANT: NAS1-18240
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Other