Pulsed fuel injection system for reducing NO.sub.x emissions
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United States of America Patent
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Sep 27, 1994
Grant Date -
N/A
app pub date -
Dec 16, 1992
filing date -
Dec 16, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for reducing the formation of NO.sub.x pollutants during the combustion of liquid fuel in a gas turbine engine. The system comprises introducing an externally modulated, rapidly-pulsed, oscillated or sinusoidal fuel flow delivery rate (generically referred to as 'modulated') to produce a controlled degree of combustor air input flow oscillation and bulk flow oscillation within the combustor which enhances the fuel-air mixing rate and homogeneity within the combustor, decreases the residence time of transition fuel/air mixtures prone to NO.sub.x formation, and substantially decreases the NO.sub.x concentration in the resulting combustion gas product without creating a net pressure gain throughout the combustion chamber.
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