Abstract
Based on a current coherent jet, this study proposes a supersonic combustion (SC) coherent jet in which the main oxygen jet is surrounded by a supersonic fuel gas. The characteristics of the proposed coherent jet are analyzed using experimental methods and numerical simulations in the high-temperature environment of electric arc furnace (EAF) steelmaking. The SC coherent jet achieved stable combustion in the EAF steel-making environment. The simulated combustion temperature of the supersonic shrouding methane gas was 2930 K, slightly below the theoretical combustion temperature of methane-oxygen gas. The high speed and temperature of the supersonic flame effectively weakened the interaction between the main oxygen jet and the external ambient gas, inhibiting the radial expansion of the main oxygen jet and maintaining its high speed and low turbulence over a long distance. These features improved the impact capacity of the coherent jet and strengthened the stirring intensity in the EAF bath.
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