To verify the simulation accuracy of current model coupling amplification factor transport equation with Spalart-Allmaras (S-A) turbulence model

Schubauer and Klebanoff flat plate (S-K)

S809 low speed airfoil

30p30n multi-element airfoil and complicated 3-D HiLiftPW-1 configure were selected for free transition calculation

and then

simulation results were compared with experimental results. Separately

current coupling model was compared with Langtry-Menter (L-M)transition model for S809 test cases. Test examples indicate that current coupling transition model can basically capture transition location and transition process

meanwhile

current coupling model performs better than L-M transition model in separated flow transition

and simulation accuracy increases by 10%; the maximum error of multi-element airfoil's transition position simulated is 6.5% compared with experiment data. For three dimensional high-lift configuration

comparison between full turbulence and free transition shows that considering boundary layer transition can simulate aerodynamic force coefficient more accurately and accuracy is promoted by 1%.