RANS Computations of 3D Flow past JAXA High Lift Configuration using Various Turbulence Models

Accurate prediction of the flow phenomena that occur in high lift flows has been found to be difficult to model with Reynolds-Averaged Navier-Stokes (RANS) equations in conjunction with a turbulence model. The complex interactions among multiple elements of the wing as well as the support hardware can be difficult for RANS equations with a turbulence model to predict accurately. Results from the recently developed Wray Agarwal (WA) one-equation turbulence model and the frequently used Spalart-Allmaras (SA) and SST k-ω turbulence models are compared to experimental results of the JAXA Standard Model in High Lift configuration to evaluate each model’s relative accuracy. It is shown that all three turbulence models under-predict the coefficient of lift while over-predict the coefficient of drag, especially at angles of attack near stall. CFD results are shown to over-predict the separation region that occurs at high angles of attack, especially towards the tip of the wing.