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- W2061317594 abstract "A study has been made of premixed fuel lean combustion in an opposed reacting jet combustor using propane as a fuel. The objectives were to demonstrate a system in which stable combustion could be maintained under very lean conditions and to investigate pollutant formation characteristics. At elevated inlet temperatures, stable combustion was achieved at equivalence ratios as low as 0.45. Composition was mapped over a range of equivalence ratios from 0.45 to 0.625 and at inlet temperatures from 300 K to 600 K. Measurements included NO, NO2, C3H8, CO2, CO, H2O, O2, N2 and temperature. Fuel lean combustion was found to be an effective method of achieving low NOx emissions and high combustion efficiencies simultaneously. A lower limit on NOx reduction was found to exist due to the tradeoff between reduced NOx and increased unburned hydrocarbon and CO emissions at low combustor temperatures and residence times. Under conditions promoting lower flame temperature, NO2 constituted up to 100% of the total NOx. The observations appear to be consistent with conversion of NO to NO2 via the HO2 radical and rapid quenching of NO2 destruction reactions. However uncertainties involving the occurrence of sampling probe reactions prevent any definite conclusion to be drawn with regard to NO2 formation. The governing differential equations were solved for the ORJ flowfield using a numerical finite difference approach. The majority of efforts were directed toward the development of a simplified kinetic model for propane combustion. This approach involved the two step global mechanism. C3H8+72O2→3CO+4H2OCO+12O2→CO2 Agreement between predicted and experimental results was fair. Discrepancies were found to be the result of the simplified kinetic and fluid mechanic approximations used." @default.
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- W2061317594 date "1977-01-01" @default.
- W2061317594 modified "2023-09-23" @default.
- W2061317594 title "Lean premixed recirculating flow combustion for control of oxides of nitrogen" @default.
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- W2061317594 doi "https://doi.org/10.1016/s0082-0784(77)80318-4" @default.
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