NDLI: Boundary layer transition

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Boundary layer transition

Content Provider	NASA Technical Reports Server (NTRS)
Author	Maestrello, L. Mangalam, S. M. Malik, M. R. Bayliss, A.
Copyright Year	1986
Description	The boundary layer stability, its active control by sound and surface heating and the effect of curvature are studied numerically and experimentally for subsonic flow. In addition, the experimental and flight test data are correlated using the stability theory for supersonic Mach numbers. Active transition fixing and feedback control of boundary layer by sound interactions are experimentally investigated at low speed over an airfoil. Numerical simulation of active control by surface heating and cooling in air shows that by appropriate phase adjustment a reduction in the level of perturbation can be obtained. This simulation is based on the solution of two-dimensional compressible Navier-Stokes equations for a flat plate. Goertler vortices are studied experimentally on an airfoil in the Low Turbulence Pressure Tunnel (LTPT). The flow pattern was visualized using the sublimating chemical technique and data were obtained using a three component laser velocimeter. The effect of curvature on swept leading-edge stability on a cylinder was numerically studied. The results suggest that transition is dominated by traveling disturbance waves and that the waves with the greatest total amplification has an amplitude ratio of e sup 11. Experimental data from the quiet supersonic tunnel and flight tests are analyzed using linear compressible stability theory.
File Size	4177110
Page Count	13
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19880005560
Archival Resource Key	ark:/13960/t2799286b
Language	English
Publisher Date	1986-12-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Navier-stokes Equation Numerical Analysis Subsonic Flow Flow Distribution Flow Visualization Airfoils Boundary Layer Transition Boundary Layer Stability Active Control Boundary Layer Control Mach Number Goertler Instability Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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