Abstract
A three-dimensional high-lift system was computationally simulated to investigate the effectiveness of lift-enhancing tabs on swept wings. The computations were performed by solving the incompressible Navier-Stokes equations on structured, overset grids, and the effects of turbulence were simulated using the one-equation Baldwin-Barth model. Three leading edge sweep angles (0 , 15, 30 deg.) were investigated with and without lift enhancing tabs. The results show that, for the geometry studied, tab effectiveness increases with leading edge sweep angle. Increases in wing lift coefficients of approximately 5%, 27% and 36% were seen for the three sweep angles at ten degrees angle of attack. The computed results for the unswept case are compared with experimental data, and the results from both cases are in agreement.
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