Combustion of liquid hydrocarbon fuel in an evaporative burner with forced supply of superheated steam and air to the reaction zone

• Published in: Fuel (Guildford) Vol. 309; p. 122181
• Main Authors: Minakov, A.V., Anufriev, I.S., Kuznetsov, V.A., Dekterev, A.A., Kopyev, E.P., Sharypov, O.V.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-02-2022; Elsevier BV
• Subjects: Air supplies; Combustion; Comparative analysis; Emissions; Emissions control; Flow rates; Flow velocity; Heptanes; Hydrocarbon fuels; Liquid fuel combustion; Mathematical models; Nitrogen oxides; NOx reduction; Numerical simulation; Photochemicals; Soot; Steam flow; Steam gasification; Superheated steam; Numerical simulation; Liquid fuel combustion; NOx reduction; Steam gasification; Superheated steam; Soot
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2021.122181

•N-heptane combustion in a low emission burner has been investigated numerically.•Effect of steam and air forced supply on the combustion characteristics was analyzed.•Soot and NOx formation are significantly reduced with increasing steam flow rate.
Combustion of n-heptane in a laboratory pattern of an original evaporative-type burner with the supply of air or superheated steam to the reaction zone was studied experimentally and numerically. Turbulence was simulated on the basis of the k-ω SST RANS model. Combustion was simulated using the Eddy Dissipation Concept (EDC) model with a detailed kinetic mechanism. The developed mathematical model was verified; a good agreement between calculation results and obtained experimental data is shown. For the first time, a comparative analysis of the effect of forced supply of steam and air on the local and integral characteristics of combustion is carried out. Radical difference in the effect of steam supply in comparison with air supply on reducing emissions of nitrogen oxides and soot from the burner is shown. The burner operating regimes have been studied in detail in a wide range of flow rates of supplied steam and fuel. It has been found that with an increase in steam flow rate, underburning, soot formation and production of nitrogen oxides are significantly reduced.