22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-2.11.3

PREDICTION OF LIFT LOSSES DUE TO SURFACE ROUGHNESS BY MEANS OF A 2D NAVIER-STOKES SOLVER

Per Weinerfelt
SAAB Aerospace, Sweden

Keywords: surface roughness, navier-stokes calculations

The 2D Navier-Stokes code ns2d at SAAB Aerospace has been used to simulate the effect of surface roughness for several 2D flow cases and geometries. The effect of surface roughness has been modelled by a modification of the wall distance in the Chien’s ?e model. The flow over a flat plate, the NACA 652 A2155 wing profile and the SAAB 2000 wing/flap geometry, for both clean and rough surfaces, have been computed. Comparisons with wind tunnel/flight test data are also presented.

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