Turbulence model in supersonic jet flow field

To determine a suitable turbulence model for the numerical simulation of supersonic jet flow fields, the differences and application scopes of five turbulence models were analyzed theoretically first, and then supersonic jet flow fields with different Mach numbers were numerically simulated using these five turbulence models. The numerical simulation results were comparatively analyzed with the measured and theoretical values. It is shown that compared with other models, the shear stress transmission k-ω (SST k-ω) model has a relative higher accuracy in calculating the supersonic jet flow fields through modifying the transport equation. In the simulation of flow fields inside and outside the nozzle, the simulation result of the SST k-ω model is more in agreement with the measured and the theoretical values. Among the five turbulence models, the SST k-ω model is most suitable for the numerical simulation of the supersonic jet flow fields.