Scale-Resolving Simulations of Laminar-to-Turbulent Transition in Swept-Wing Flow

Denison, Marie ; Garai, Anirban ; Murman, Scott

关键词: SIMULATION;    LAMINAR FLOW;    LAMINAR BOUNDARY LAYER;    TURBULENT FLOW;    TRANSITION FLOW;    SWEPT WINGS;    COMPUTATIONAL FLUID DYNAMICS;    WIND TUNNEL TESTS;    LEADING EDGES;    PREDICTIONS;    STATISTICAL CORRELATION;    GALERKIN METHOD;    AIRCRAFT DESIGN;    AERODYNAMIC CONFIGURATIONS;   

RP-ID  :  ARC-E-DAA-TN63606

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Aerodynamic shape optimization of swept Natural Laminar Flow (NLF) wing design plays an important role for the development of future energy-efficient commercial transport aircraft. Lack of predictive laminar-to-turbulent transition modeling capabilities is still limiting the extent to which design can rely on computational tools, while making costly wind tunnel and flight tests a necessity. Prediction of transition on practical 3D wing geometries using the e (sup N) method coupled with laminar boundary layer and linear stability codes or local statistical correlation CFD (Computational Fluid Dynamics) models such as the gamma - Re (sub theta) Langtry-Menter model have proven challenging, whereas transitional hybrid RANS-LES solvers have shown encouraging but still mitigated results.