Numerical Investigation of Hydrogen-Enriched Diesel Addition Effects in a Furnace Burner: Flame Temperatures and Exhaust Emissions

In this work, the effects of adding hydrogen to diesel non-premixed combustion with air in a cylindrical furnace burner are investigated. A numerical model is developed to study the effects of hydrogen addition on combustion flame temperature and exhaust emissions. Different hydrogen addition ratios of 5%, 10%, 15%, and 20% by volume in the burning mixture are considered. The turbulence-chemistry interaction is modelled through the eddy dissipation combustion model to predict the concentration of exhaust emissions and the temperature of the combustion flame. The air–fuel equivalence ratio is consistently set to 1 (stoichiometry) across all the considered cases. Results show that the hydrogen enrichment of diesel increases flame temperature and diminishes carbon emissions while enhancing the generation of NO
x
emissions. Hence, careful consideration should be given to NO
x
emission control in high temperature flame systems when hydrogen is used to enrich the fuel mixture and reduce carbon emissions.