Numerical Simulation of Supersonic Oxygen Jets at High Ambient Temperature

In this paper, the behavior of cold supersonic oxygen jets entering into high-temperature environment is predicted with four two-equation turbulence models and they are the standard k-epsilon model, the realizable k-epsilon model, the standard k-omega model, and the SST k-omega model. The comparison with experimental results in the literature shows that the standard k-omega turbulence model is superior to the other models when simulating the supersonic jet at high temperature. On this basis, the characteristics of supersonic oxygen jets at high temperature especially at steelmaking temperature are studied. The simulation results indicate that the attenuation of axial velocity of jets slows down and the length of jet potential core extends when increasing the ambient temperature. Meanwhile, the dynamic pressure of multiple jets near the lance centerline increases as the ambient temperature rises. In addition, the effects of ambient temperature on the dynamic pressure of the jet core and the coalescence of multiple jets are also discussed.