Abstract
The results of numerical modeling of heat transfer during the cooling of a metal cylinder by a stream of water-air medium in a vertical annular channel are presented. The results are obtained on the basis of the mathematical model of the conjugate heat transfer of the water-air medium flow and a metal cylinder in a two-dimensional nonstationary formulation, taking into account the axisymmetry of the cooling medium flow with respect to the longitudinal axis of the cylinder. To solve the system of differential equations, the control volume method is used. The flow field parameters are calculated by the SIMPLE algorithm. For the iterative solution of linear algebraic equation systems, the Gauss-Seidel method with lower relaxation was used. The results of calculating the heat transfer parameters for cooling high-temperature metal cylinder by a stream of a water-air medium stream are obtained taking into account the evaporation. The values of a metal cylinder temperature are determined when cooled by a laminar flow medium. The intensity of the change in the cooling rate of the cylinder is analyzed depending on the proportion of air in the liquid and the time of the cooling process.
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