Journal of Applied Fluid Mechanics, Vol. 16, No. 2, pp. 233-243, 2023. Available online at www.jafmonline.net, ISSN 1735-3572, EISSN 1735-3645. https://doi.org/10.47176/jafm.16.02.1352 Optimization of the Injectors Position for an Electric Arc Furnace by using CFD Simulation G. Coskun, C. Sarikaya, E. Buyukkaya † and H. Kucuk Department of Mechanical Engineering, Sakarya University, Sakarya, 54050, Turkey †Corresponding Author Email: [email protected] (Received June 15, 2022; accepted September 25, 2022) ABSTRACT In this study, complex processes in a typical Electric Arc Furnace (EAF) such as combustion, radiation, heat, and mass transfer were solved and the optimum injector location was found using computational fluid dynamics (CFD). The main aim of the injection optimization was to improve the thermal performance and the metallurgical process by changing the injection angle, the central angle of the injector (CAI), and injector length. Fifteen parametric cases were predicted and analyzed for optimization study. To decrease each simulation solution time of each cases, a polyhedral mesh structure was used instead of tetrahedral mesh for the EAF geometry. Thus, the total element number of the model was decreased by 1/5 while providing faster and unchanging results compared to the case with a tetrahedral mesh structure. The response surface optimization method was used for the optimization study. As a result, the optimum injector positioning was obtained as injection angle: -45°, injector length 614 mm, and CAI: 60°. Keywords: Electric Arc Furnace (EAF); Computational Fluid Dynamics (CFD); Fine coal combustion; Injectors; Optimization. NOMENCLATURE absorption coefficient net rate of production of species i pre-exponential factor ℎ the heat of chemical reaction linear-anisotropic phase function coefficient Source term C1Ɛ constant Source term C2 constant source term C3Ɛ constant Source term activation energy , ′′ product species stoichiometric coefficient external body forces , ′ stoichiometric coefficient for reactant i incident radiation mass fraction of any product species production of turb. kin. en. due to buoyancy mass fraction of particular reactant production of turbulent kinetic energy ̿ stress tensor unit tensor turbulent dissipation rate diffusion flux of species constant turbulent kinetic energy scattering coefficient effective conductivity constant , molecular weight of species i density number of reactions molecular viscosity static pressure eddy viscosity universal gas constant temperature exponent
Optimization of the Injectors Position for an Electric Arc Furnace by using CFD Simulation
Jun 12, 2023
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