발간논문

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Vol.39, No.8, 932 ~ 939, 2001
Title
Mathematical Modeling : A Numerical Simulation of Oxygen Jet under Reduced Pressure in RH Process
감동헌Dong Heun Kam,한정환Jeong Whan Han,김범수Beom Soo Kim,안상복Sang Bok Ann
Abstract
A numerical simulation was carried out to predict the compressible fluid flow of oxygen jet from the top blown-lance in RH vessel under reduced pressure. The shock and expansion waves of a jet coming from a convergent-divergent nozzle were predicted with the change of pressure conditions in RH vessel using single-hole nozzle. The effects of tilt angle at a given PCD were examined in RH vessel using tri-hole nozzle. Finite volume method was used as space difference scheme, Rho`s Approximate Riemann scheme to calculate flux at the cell face and LU-SGS as time integral scheme. The results provide oxygen jet flow characteristics due to the change of pressure condition in RH vessel. At lowered pressure conditions of 100Pa a supersonic flow under expanded jet was Found and that of 5,000Pa oblique shock waves with over expanded jet was found. On the contrary pressure condition of 50,000Pa, subsonic flow was developed.
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