Экспериментальные исследования различных режимов горения смеси метана и азота с воздухом

Abstract

This paper presents the results of an experimental study of combustion of a methane-nitrogen mixture with air in diffusion and premixed flames. It is shown that in the diffusion flame with an excess air coefficient equal to 1, an increase in the volume fraction of nitrogen in methane leads to a decrease in the yield of nitrogen oxides NOx and carbon oxides CO. An increase in the excess air coefficient leads to a drop in the yield of NOx. The yield of CO has a maximum in excess air coefficients range from 1 to 2. Preliminary mixing of combustible gas with air for all compositions helps to reduce the yield of harmful substances, but combustion becomes less stable. In the experiments conducted, premixed flame breakdown for all compositions was observed already at excess air coefficients greater than 2. The obtained results can be used to verify the numerical model, as well as to identify engineering models of the release of harmful substances in the presence of ballast in the combustible gas.