Fifth AIAA High-Lift Prediction Workshop: Overview and Workshop Summary

The Fifth AIAA High-Lift Prediction Workshop assessed the numerical prediction capability of current-generation computational fluid dynamics technology for swept, medium/high-aspect-ratio wings in high-lift configurations. A key aspect of this endeavor was the use of technology focus groups (TFGs), which included both mesh-generation and flow-solver experts working together to accelerate advancements for particular computational fluid dynamics methodologies. The high-lift version of the NASA Common Research Model configuration was the focus of this workshop and was used for three test cases. Wind-tunnel data were available for comparison for one of the test cases. Test cases were evaluated sequentially by each TFG, with mini-workshops held after each test case to collectively review results across all TFGs. This paper provides a high-level summary of the results and conclusions from the workshop. As concluded from past workshops, fixed-grid Reynolds-averaged Navier–Stokes methods continued to be inaccurate and inconsistent for high-lift flows near maximum lift. However, application of mesh-adaptation technology helped to achieve improved consistency. Scale-resolving methods appeared most promising for predicting high-lift flow physics, particularly at maximum lift. Best practices for these methods were refined during the workshop, and new challenges were identified. Ultimately, these findings support the development of a roadmap to dependable, flight-envelope-wide aerodynamic predictions.