A New Recycling Method to Generate Turbulent Inflow Profiles

Garai, Anirban ; Murman, Scott M ; Ekelschot, Dirk

关键词: BOUNDARY CONDITIONS;    LAMINAR BOUNDARY LAYER;    SIMULATION;    TURBULENCE;    TURBULENT BOUNDARY LAYER;    TURBULENT JETS;    NUMERICAL ANALYSIS;    UPSTREAM;   

RP-ID  :  ARC-E-DAA-TN69970

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The accuracy of the scale-resolving simulations for practical geometries strongly depends on the inflow boundary conditions. Imposing experimentally observed turbulent inflow profiles for the numerical simulations is a major challenge. Existing methods available in the literature assume self-similar behavior, which is not true for most of the experiments. In the present work, we formulate the turbulent inflow profile generation technique as an optimization problem. An adjoint technique is exploited to evaluate the sensitivities of multiple input parameters for the present problem. The present formulation is then tested to generate a laminar boundary layer profile, turbulent boundary layer profile, and turbulent jet profile.