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A Study of Aerodynamic Control in Stalled Flight Long Laminar Separation Bubble Analysis

Report Number: AFWAL TR 84-3091
Author: Dvorak, F. A.
Author: Choi, D. H.
Corporate Author: Analytical Methods, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1985-02-01
Pages: 28
Contract: F33615-81-C-3626
Project: 2307
AD Number: ADA153850

This report describes an analysis method for laminar separation bubbles (long or short) on two-dimensional airfoil sections at incidence. A viscous/potential flow iterative procedure was chosen due to its simple and efficient nature. The boundary layer procedure is a finite-difference method, sometimes referred to as the 'Bosx Scheme', and uses the Cebeci-Smith two-layer, eddy viscosity model for turbulence closure. The potential flow calculation in such a way that it gives constant pressure along the surface inside the bubble, The coupled calculation procedure has been applied to the NACA 64A006 airfoil and satisfactory results have been obtained. Keywords: Panel methods; and Laminar separation bubble.

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