OVERFLOW Analysis of the DLR-F11 High-Lift Configuration Including Transition Modeling

Abstract

The OVERFLOW Reynolds-averaged Navier–Stokes solver has been used to predict the aerodynamic characteristics of the DLR-F11 high-lift configuration for the conditions prescribed for the second AIAA Computational Fluid Dynamics High-Lift Prediction Workshop. A grid-convergence study is performed for the geometry with the slat and flap brackets excluded. The influence of including the brackets in the computational geometry is considered, and the effects of varying Reynolds number are analyzed for the brackets-on configuration. An optional case for the workshop, but a focus of this paper, is the inclusion of laminar–turbulent transition in the solutions. Two computational-fluid-dynamics-compatible transition models are used for the analysis, and their behaviors are discussed. A turbulence-model-verification study, which was also an optional case for the workshop, is included.