Effect of exhaust gas recirculation on emissions from a flame-tube combustor using liquid Jet A Fuel
National Aeronautics and Space Administration, 1976 - Technology & Engineering - 24 pages
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0.5 megapascal 1.2 Equivalence ratio 10-percent recirculation 15 meters 25 percent 30 meters 50 percent adiabatic recirculation air and recirculated calculated carbon monoxide centimeters chemical equilibrium combustion inefficiency combustor pressure corrected for heat corrected inlet air creased diameter Effect of Recirculation ejector nozzle ence velocity equilibrium flame temperature Equivalence ratio Figure EXHAUST GAS RECIRCULATION External recirculation FARR flame-tube combustor flameholder present fuel flow gas-sampling probe gases heat loss higher equivalence ratios increased recirculation Increasing the recirculation inlet air temperature inlet airflow Jet A fuel kilogram of fuel Liquid Jet mass flow rates metered fuel-air ratio meters per second Mixed station mixed stream nitrogen oxides Nominal recirculation NOx emission index oxides of nitrogen oxygen atom concentration percent recirculation products to inlet recirculated products recirculation gas-sampling station recirculation loop recirculation ratio recirculation was increased reduced reference velocity residence sample shown in figure unburned hydrocarbons varied from 0.3 varied from 590 water injection