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Numerical Simulation of Supersonic Oxygen Jets at High Ambient Temperature
Author(s) -
Li Ziliang,
Cang Daqiang
Publication year - 2017
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201600209
Subject(s) - supersonic speed , turbulence , mechanics , jet (fluid) , coalescence (physics) , thermodynamics , materials science , ambient pressure , nozzle , oxygen , physics , quantum mechanics , astrobiology
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 – ϵ model, the realizable k – ϵ model, the standard k – ω model, and the SST k – ω model. The comparison with experimental results in the literature shows that the standard k – ω 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.