Journal
FUEL
Volume 309, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.122181
Keywords
Liquid fuel combustion; Superheated steam; Steam gasification; Soot; NOx reduction; Numerical simulation
Categories
Funding
- Russian Science Foundation [18-79-10134]
- RF government [075-15-2019-1888]
- Russian Science Foundation [18-79-10134] Funding Source: Russian Science Foundation
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This study investigated experimentally and numerically the combustion of n-heptane in a laboratory evaporative-type burner, showing a significant difference in combustion characteristics between steam and air supply, with steam supply significantly reducing nitrogen oxides and soot emissions.
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-omega 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.
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