THREE-DIMENSIONAL AREAS OF TEMPERATURE FIELDS AND AERODYNAMIC CONDITIONS IN BOX-TYPED PROCESS FURNACES
We study the influence of three-dimensional parameters variation of the combustion products on the heat flux density distribution along the reaction tubes in a radiation chamber of the boxtyped tube furnace used in petrochemical industry. The calculation results of external heat and mass exchange performed in three and two-dimensional approximations were compared. It is shown that there is a significant nonuniformity of the flow parameters in the methane-air combustion area, that leads to nonuniform distribution of heat fluxes over the furnace depth. Away from the burners, these irregularities decrease and variations of almost all parameters approach to two-dimensional ones