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SR11 Máquinas Térmicas, Ciclos Termodinâmicos e Propulsão |
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Title:
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A NUMERICAL MODEL TO PREDICT THE EFFECTS OF EXHAUST GAS RECIRCULATION ON NO EMISSIONS
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Summary :
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THE CLAIM FOR REDUCING NOX EMISSIONS FROM INTERNAL COMBUSTION ENGINES SOURCES HAS LED TO THE APPLICATION OF EXHAUST GAS RECIRCULATION (EGR) TECHNOLOGY. BY SUCH MEANS, THE TEMPERATURE OF THE PRODUCTS MIXTURE IS LOWERED REDUCING NO FORMATION FROM THE ZELDOVICH MECHANISM (THERMAL NO). THE INJECTION OF HOT PRODUCTS BACK TO THE COMBUSTION CHAMBER MAY ALTER SIGNIFICANTLY THE PERFORMANCE OF THE SYSTEM THIS PAPER PRESENTS A NUMERICAL MODEL TO PREDICT THE INFLUENCE OF EGR FOR A WIDE RANGE OF AIR/FUEL DILUTION BY THE INERT GAS. A ROUTINE, WHICH CALCULATES COMPLEX STATES OF CHEMICAL EQUILIBRIUM, IS EMPLOYED THUS ALLOWING A GREAT NUMBER OF SPECIES TO BE TREATED BY THE MODEL. THE MODELS ALLOW THE PREDICTIONS OF EGR FOR WIDE RANGE OF HYDROCARBON FUELS, INCLUDING ALCOHOL, IN IC ENGINES, BOILERS, AND TURBINES. EXPERIMENTAL RESULTS FROM AN INTERNAL COMBUSTION ENGINE TEST FACILITY ARE THEN USED TO VALIDATE THE MODEL AS WELL AS TO ESTABLISH THE PRACTICAL LIMITS FOR RECIRCULATION. |
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Author :
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Falcão, Alessandra F.M.
Gurgel Veras, Carlos Alberto
Mol, Juliana M.D.
Tourino, Sergio R.G.
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Paper View :
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