NUMERICAL INVESTIGATION OF HEAT TRANSFER DURING THE COOLING OF A METAL CYLINDER BY A FLOW OF A GAS-LIQUID MEDIUM IN AN ANNULAR CHANNEL

A mathematical model of conjugate heat transfer in the heterogeneous system "solid–gas–liquid medium" with account of the description of bubble vaporization in a liquid fl ow has been proposed. Consideration has been given to a two-dimensional nonstationary formulation taking account of the axisymmetry of cooling-medium fl ow about the longitudinal axis of a cylinder. Results of numerical calculations of thermophysical parameters during the cooling of a high-temperature metal cylinder manufactured from structural-grade steel by a fl ow of a gas–liquid medium in an annular channel have been given. The infl uence of the fl ow velocity on the value of the concentration of the vapor in the liquid and the regularities of cooling of the metal cylinder have been assessed. An analysis has been made of the infl uence of the formation, growth, and motion of vapor bubbles in the liquid on the distribution of the heat fl ux over the surface of the conjugate boundary of the metal cylinder and the gas–liquid medium.
   
Author:  S. S. Makarov A. M. Lipanov and A. I. Karpova
Keywords:  gas–liquid medium, high-temperature metal cylinder, vaporization, conjugate heat transfer, numerical modeling
Page:  956