The current state-of-the-practice technology for high-lift aerodynamic simulations is to solve the Reynolds-averaged Navier–Stokes (RANS) equations on a fixed grid or a refinement sequence of fixed grids. The Fixed-Grid Reynolds-Averaged Navier–Stokes Technology Focus Group set out to determine meshing requirements and best practices, whether RANS can accurately predict the change in aerodynamic performance with changes in flap deflection, whether RANS modeling can produce accurate results near C L max , and the effects of underconvergence and solution strategy on computed results. Eighteen groups of participants submitted over 100 datasets. Challenges with grid convergence and iterative convergence made it impossible to definitively answer all the questions we had posed. Despite this, we can conclude that meshes with at least half a billion cells (more than one billion degrees of freedom) are required for grid convergence away from stall; that RANS simulations cannot currently be reliably used to predict aerodynamic coefficients near stall, nor changes in coefficients with changes in flap angle; that iterative underconvergence remains a significant source of uncertainty in outputs; and that solution initialization can have an important effect on solution behavior, including flow separation patterns.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fourth AIAA High-Lift Prediction Workshop: Fixed-Grid Reynolds-Averaged Navier–Stokes Summary


    Contributors:

    Published in:

    Journal of Aircraft ; 60 , 6 ; 1785-1797


    Publication date :

    2023-05-10


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    Comparison of Reynolds-Averaged Navier-Stokes Simulations of Multi-Element High-Lift Configurations

    Mitsuhiro Murayama / Taro Imamura / Kazuomi Yamamoto et al. | AIAA | 2007


    Steady Reynolds Averaged Navier Stokes Equation-Based Buffet Loads Estimation (AIAA 2016-4045)

    Chyczewski, Thomas S. | British Library Conference Proceedings | 2016


    Constrained Recalibration of Reynolds-Averaged Navier–Stokes Models

    Bin, Yuanwei / Huang, George / Kunz, Robert et al. | AIAA | 2023