SU2 results for the Fifth High Lift Prediction Workshop

The pursuit of more environmentally sustainable air travel necessitates advancements in high-lift aircraft configurations, which can improve efficiency by increasing payload capacity or enabling slower, more fuel-efficient cruise speeds. However, accurately predicting aerodynamic performance in such configurations remains challenging due to the complexity of flow simulations around intricate geometries. The High-Lift Prediction Workshop (HLPW), now in its fifth iteration, aims to address these challenges by comparing methods across various Technical Focus Groups (TFGs). This study focuses on the Fixed-Grid RANS TFG and presents results using the SU2 open-source CFD tool. Simulations of 2D and 3D test cases were conducted to verify turbulence model implementation and assess high-lift performance. For a Joukowsky airfoil, convergence analysis highlighted limitations in drag decomposition accuracy, though overall convergence was achieved. In a semi-span high-lift configuration, different restart strategies were evaluated, demonstrating that warm-start approaches significantly improved solution convergence and aerodynamic predictions compared to hot-start strategies. The final test case examined a full configuration with additional components, revealing solver-specific sensitivities in stall prediction and maximum lift coefficient estimation. The findings underscore notable improvements in convergence strategies and good agreement between SU2 solver and the other participants across the range of test cases investigated.