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The effect of local parameters on gas turbine emissionsGas turbine engine inlet parameters reflect changes in local atmospheric conditions. The pollutant emissions for the engine reflects these changes. In attempting to model the effect of the changing ambient conditions on the emissions it was found that these emissions exhibit an extreme sensitivity to some of the details of the combustion process such as the local fuel-air ratio and the size of the drops in the fuel spray. Fuel-air ratios have been mapped under nonburning conditions using a single JT8D-17 combustion can at simulated idle conditions, and significant variations in the local values have been found. Modelling of the combustor employs a combination of perfectly stirred and plug flow reactors including a finite rate vaporization treatment of the fuel spray. Results show that a small increase in the mean drop size can lead to a large increase in hydrocarbon emissions and decreasing the value of the CO-OH rate constant can lead to large increases in the carbon monoxide emissions. These emissions may also be affected by the spray characteristics with larger drops retarding the combustion process. Hydrocarbon, carbon monoxide, and oxides of nitrogen emissions calculated using the model accurately reflect measured emission variations caused by changing engine inlet conditions.
Document ID
19800054836
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kauffman, C. W.
(Michigan, University Ann Arbor, Mich., United States)
Correa, S. M.
(Michigan Univ. Ann Arbor, MI, United States)
Orozco, N. J.
(Michigan Univ. Ann Arbor, MI, United States)
Date Acquired
August 10, 2013
Publication Date
June 1, 1980
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA PAPER 80-1290
Meeting Information
Meeting: Joint Propulsion Conference
Location: Hartford, CT
Start Date: June 30, 1980
End Date: July 2, 1980
Sponsors: AIAA, SAE, and ASME,
Accession Number
80A39006
Funding Number(s)
CONTRACT_GRANT: NSG-3165
Distribution Limits
Public
Copyright
Other

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