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Fuel/air nonuniformity - Effect on nitric oxide emissionsAn analytical and experimental study was performed to determine the effect of inlet fuel/air profile nonuniformity on NO(x) emissions. The theoretical NO(x) levels were verified in a flame-tube rig at inlet air temperatures of 600, 700, and 800 K, 0.3 MPa rig pressure, 25 m/sec reference velocity, overall equivalence ratio of 0.6 and residence time near 0.002 sec. The theory predicts an increase in NO(x) emissions for increased fuel/air nonuniformity for average equivalence ratios less than 0.7, while for average equivalence ratios near stoichiometric, increasing the nonuniformity will decrease NO(x) emissions. The results can be used to predict the degree of uniformity of fuel/air profiles necessary to achieve NO(x) emissions goals for actual engines that use lean premixed, prevaporized combustion systems.
Document ID
19810036430
Document Type
Conference Paper
Authors
Lyons, V. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA PAPER 81-0327
Meeting Information
Meeting: Aerospace Sciences Meeting
Location: St. Louis, MO
Start Date: January 12, 1981
End Date: January 15, 1981
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
81A20834
Distribution Limits
Public
Copyright
Other

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