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Evaluation of fuel preparation systems for lean premixing-prevaporizing combustorsA series of experiments was carried out in order to produce design data for a premixing prevaporizing fuel-air mixture preparation system for aircraft gas turbine engine combustors. The fuel-air mixture uniformity of four different system design concepts was evaluated over a range of conditions representing the cruise operation of a modern commercial turbofan engine. Operating conditions including pressure, temperature, fuel-to-air ratio, and velocity, exhibited no clear effect on mixture uniformity of systems using pressure-atomizing fuel nozzles and large-scale mixing devices. However, the performance of systems using atomizing fuel nozzles and large-scale mixing devices was found to be sensitive to operating conditions. Variations in system design variables were also evaluated and correlated. Mixing uniformity was found to improve with system length, pressure drop, and the number of fuel injection points per unit area. A premixing system capable of providing mixing uniformity to within 15 percent over a typical range of cruise operating conditions is demonstrated.
Document ID
19860037343
Document Type
Conference Paper
Authors
Dodds, W. J.
(General Electric Co. Cincinnati, OH, United States)
Ekstedt, E. E.
(General Electric Co., Aircraft Engine Business Group, Cincinnati OH, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1985
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
ASME PAPER 85-GT-137
Accession Number
86A22081
Funding Number(s)
CONTRACT_GRANT: NAS3-22006
Distribution Limits
Public
Copyright
Other

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