Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1995-06-05
1998-09-29
Freay, Charles G.
Power plants
Combustion products used as motive fluid
Combustion products generator
60748, 60 39091, 239403, F02C 100
Patent
active
058132325
ABSTRACT:
The present invention relates generally to a low emission can-annular combustion system for an industrial gas turbine engine to satisfy increasingly stringent environmental requirements. The combustion system of the present invention employs a dual mode combustion technique to meet engine operability requirements and high power emission targets without the use of combustor diluent injection or post combustor exhaust treatment. A lean premix combustion mode is utilized to minimize primary zone combustion temperatures and limit the oxide of nitrogen production during high power engine operation. A pilot-starting auxiliary fueling system is utilized to augment the main premix fueling system. The lean premix combustion mode is enabled by a lean premix dome having a fixed axial swirler with radial fuel pathways connecting to a circumferential main fuel manifold for distributing the fuel more uniformly across the flow path. A converging portion in the lean premix dome accelerates the fluid flow to prevent flashback from the primary combustion zone.
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McLeroy Jacob T.
Razdan Mohan K.
Smith Duane A.
Allison Engine Company, Inc.
Freay Charles G.
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