The flows around the three-element high-lift airfoil under the approaching conditions using seven eddy-viscosity turbulence models commonly applied to engineering in Fluent software were simulated numerically. Through a systematic comparison of the simulation results with the experiment results and the corresponding delayed detached eddy simulation (DDES) results

including the pressure coefficient

Mach number

vorticity and turbulent kinetic energy of airfoil

conclusions were drawn about their predicting abilities for this airfoil. Results show that

the standard k-ω model has the best predicting abilities for the averaged flow field

providing a better simulation for the pressure coefficient around the airfoil

the separating point and separating zone magnitude on the flap; the shear stress transport (SST) k-ω model also has the same abilities. The one-equation SA(Spalart-Allmaras) model and four-equations v2-f model shares similar abilities; but the simulation results given by the k-ε series models seem worse compared to all. As for the predicting abilities for the turbulent kinetic energy

conclusions similar to the averaged flow field are drawn. However

the "largest" turbulent kinetic energy distribution around the separating zone on the flap isn't captured by all the turbulence models.