22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-3.4.5

TRANSITION ONSET PREDICTIONS FOR HIGH-LIFT CONFIGURATIONS

R. M. Czerwiec, J. R. Edwards, H. A.Hassan
North Carolina State University, Raleigh, 27695-7910, USA

Keywords: aerodynamics: high angle of attack, transition and turbulence

A new approach that employs an innovative implementation of results of linear stability theory and modeling of transitional flows is used to predict onset and extent of transition on multi-element airfoils at high angles of attack. It is based on the k-?. transitional/turbulence model. The approach is validated by calculating flows past the multi-element McDonnell Douglas landing configuration at two angles of attack, 8 and 16 degrees. Comparisons involve pressure distribution, velocity profiles, transition onset, and Reynolds shear stresses. In general, good agreement with all measurements is indicated. Some differences (less than 3%) are noted in the prediction of the extent and penetration of the slat wake at the higher angle of attack.

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