Eight turbulence models were employed in the detailed numerical investigations for transonic flows in the Sajben diffuser

so as to assess the predictive capabilities of the turbulence models for shock-wave/turbulent boundary layer interactions in internal flows

including the Spalart-Allmaras model

the standard k-ε model

the RNG(re-normalization group) k-ε model

the realizable k-ε model

the standard k-ω model

the SST (shear stress transport) k-ω model

the v2-f model

and the Reynolds stress model. The performance of these different turbulence models was systematically assessed by comparing the numerical results with the available experimental data. The v2-f model and the SST k-ω model performed much better than other models

and the SST k-ω model predicted a little better than the v2-f model for pressure on walls

while v2-f model predicted a little better than the SST k-ω model for separation location

reattachment location and separation length in strong shock case.