PREDICTION OF HIGH-LIFT FLOWS USING TURBULENT CLOSURE MODELS

The flow over two different multielement airfoil configurations is com puted using linear eddy-viscosity turbulence models and a nonlinear ex plicit algebraic stress model. Transition locations that were recently measured using hot film on one of the configurations are presented, a nd the effect of transition location on the computed solutions is expl ored. Deficiencies in make profile computations are found to be attrib utable in large part to poor boundary-layer prediction on the generati ng element rather than on inadequate turbulence modeling in the wake. Using measured transition locations for the main element improves the prediction of the main-element boundary-layer thickness, skin friction , and wake profile shape. However, using measured transition locations on the slat still yields poor slat-wake predictions. The computation of the slat flowfield remains a major problem in the successful predic tion of multielement flows. In general, the nonlinear, explicit algebr aic stress turbulence model yields results that are similar to those o f the linear eddy-viscosity models.