Numerical simulation of aerodynamic characteristics of trapezoidal wing configuration at different flap angles

Based on the Reynolds-averaged Navier-Stokes (RANS) equations and structured grid technology, with second-order monotonic upstream-centered scheme for conservation laws (MUSCL), combined with shear stress transport (SST) turbulence model and γ-Reθ transition model, the influence of different flap angles on the aerodynamic characteristics of high lift trapezoidal wing is studied. The purpose of the present work is to further validate the ability of CFD solver-Trisonic Platform (TRIP) in simulating the small increments of aerodynamic characteristics resulting from different flap angles of the trapezoidal wing configuration. Firstly, the numerical methods are introduced briefly. Then, the trapezoidal wing configuration with two different flap angels and the experimental activities are described. At last, on the basis of grid convergence study, the influence of different flap angles on the aerodynamic characteristics of the trapezoidal wing configuration is studied with fully turbulent and transition models. Compared with the experimental data, the numerical results illustrate that the small increments of aerodynamic characteristics due to different flap angles can be predicted reasonably with either fully turbulent model or transition model, numerical accuracy of aerodynamic characteristics of the trapezoidal wing configuration is improved obviously with γ-Reθ transition model included and further study on the simulation of aerodynamic characteristics near the stall angle is needed. ©, 2015, AAAS Press of Chinese Society of Aeronautics and Astronautics. All right reserved.