NAVIER-STOKES COMPUTATIONS AND EXPERIMENTAL COMPARISONS FOR MULTIELEMENT AIRFOIL CONFIGURATIONS

A two-dimensional unstructured Navier-Stokes code is utilized for comp uting the flow around multielement airfoil configurations. Comparisons are shown for a landing configuration with an advanced-technology fla p. Grid convergence studies are conducted to assess inaccuracies cause d by inadequate grid resolution, Although adequate resolution is obtai ned for determining the pressure distributions, further refinement is needed to sufficiently resolve the velocity profiles at high angles of attack. For the advanced flap configuration, comparisons of pressure distributions and lift are made with experimental data. Here, two flap riggings and two Reynolds numbers are considered. In general, the tre nds caused by variations in these quantities are well predicted by the computations, although the angle of attack for maximum lift is overpr edicted.