Investigation of radiation heat transfer effects on NO_x emission in a glass furnace

摘要

The effects of radiation heat transfer on NO_x emission in a glass furnace was investigated by using a computational fluid dynamics (CFD) code that includes comprehensive NO_x kinetic and radiation heat transfer models. The NO_x model calculates local NO_x concentrations based on the CFD calculated flow field with a reduced kinetic mechanism. The radiation model solves the spectral radiative transport equation in a combustion space of emitting and absorbing media, i.e., CO_2, H_2O, and soot. An advanced numerical sheme was developed for the radiation heat transfer calculation in the CFD grid system. The scheme is extremely effection and absorption. A parametric study was conducted to investigate the interactions between NO_x emission and radiation as well as the impact of operating conditions on the NO_x emission of a glass furnace.