NUMERICAL INVESTIGATION OF HEAT EXCHANGE WHEN COOLING UNBREAKABLE METHOD OF METALLIC PREPARATION BY A GAS-LIQUID MEDIUM
The paper is devoted to a numerical study of heat transfer during cooling of a continuous high-temperature metal billet from structural steel 60C2 by a flow of a gas-liquid medium. The mathematical model of heat transfer is presented in a two-dimensional nonstationary formulation that takes into account the axisymmetry of the flow of the cooling medium relative to the longitudinal axis of the cylindrical metal blank. To solve the system of differential equations, the control volume method is used. Parameters of the flow field of the gas-liquid medium are calculated by the SIMPLE algorithm. For the iterative solution of systems of linear algebraic equations, the Gauss-Seidel method with lower relaxation was used. The results of the study of heat transfer parameters during cooling of an unevenly heated billet are presented. The values of the local cooling rate of the workpiece by the process time are determined.