Analysis of crossover between local and massive separation on airfoils
Analysis of crossover between local and massive separation on airfoils
- New search for: Barnett, M.
- New search for: Barnett, M.
The occurrence of massive separation on airfoils operating at high Reynolds number poses an important problem to the aerodynamicist. In the present study, the phoenonenon of crossover, induced by airfoil thickness, between local separation and massive separation is investigated for low speed (incompressible), symmetric flow past realistic airfoil geometries. This problem is studied both for the infinite Reynolds number asymptotic limit using triple-deck theory and for finite Reynolds number using interacting boundary-layer theory. Numerical results are presented which illustrate how the flow evolves from local to massive separation as the air-floil thickness is increased. The results of the triple-deck and the interacting boundary-layer analyses are found to be in qualitative agreement for the NACA four digit series and an uncambered supercritical airfoil. The effect of turbulence on the evolution of the flow is also considered. Solutions are presented for turbulent flows past a NACA 0014 airfoil and a circular cylinder. For the latter case, the calculated surface pressure distribution is found to agree well with experimental data if the proper eddy pressure level is specified.
Document information
Analysis of crossover between local and massive separation on airfoils
Analyse des Uebergangs von oertlicher zu flaechiger Stroemungsabloesung an Tragflaechen
AIAA-Papers ; Jun ; 1-12
1987
12 Seiten, 9 Bilder, 1 Tabelle, 19 Quellen
Conference paper
English