Effect of Ambient and Oxygen Temperature on Flow Field Characteristics of Coherent Jet

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2016-02, Vol.47 (1), p.228-243
• Main Authors: Liu, Fuhai, Zhu, Rong, Dong, Kai, Hu, Shaoyan
• Format: Article
• Language: English
• Subjects: Ambient temperature; Characterization and Evaluation of Materials; Chemical reactions; Chemistry and Materials Science; Coherence; Computer programs; Entrainment; Flow velocity; Fluid mechanics; Iron and steel making; Materials Science; Metallic Materials; Metallurgy; Nanotechnology; Process metallurgy; Steel production; Structural Materials; Surfaces and Interfaces; Temperature effects; Thin Films; Transaction processing
• ISSN: 1073-5615; 1543-1916
• DOI: 10.1007/s11663-015-0497-5

The coherent jets are now used widely in electric arc furnace steelmaking process to increase the stirring ability, reaction rates, and energy efficiency. However, there has been limited research on the basic physics of the coherent jets. In the present study, the characteristics of flow field of supersonic coherent jet in hot and cold condition were studied. The total temperature and axial velocity were measured by combustion experiment. Flow field characteristics of supersonic coherent jet were simulated by Fluent software. The detailed chemical kinetic mechanism is presently used for the modeling of reactions. It consists of 53 species, plus Ar and N 2 , for a total of 325 reversible reactions. The present study showed that the shrouding flame decreases the entrainment of the ambient gas to the central supersonic jet, which results in a low expansion rate for the coherent supersonic jet. The higher ambient temperature can prolong the potential core of coherent jet and conventional jet. However, the potential core of coherent jet reduces with oxygen temperature increasing, which is opposite to conventional jet.