Recently, a separating and extracting techniques of condensate gas have been developed by combining a swirl flow with
non-equilibrium condensation phenomena of condensate gas generated in a supersonic flow. However, there are many unresolved
problems for performance of operating principle. In the present study, the effects of swirl number and divergent
angle of inner body on non-equilibrium condensation in a supersonic annular nozzle and the effect of turbulence models on
the simulated results were investigated numerically. As a result, with an increase of swirl number, the positions of onset of
condensation moved upstream and mass flow rate of condensate in the range of the outer side increased. Further, it was
found that the divergent angle have effects on mass flow rate of condensate in the range of the outer side significantly and
simulated results using k − ω model agreed well with experimental ones qualitatively.