Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1995-01-30
1998-04-14
Freay, Charles G.
Power plants
Combustion products used as motive fluid
Combustion products generator
165168, 165908, 415115, F02C 712
Patent
active
057379220
ABSTRACT:
A combustor liner (2) for convectively cooling a combustor chamber (16) in a gas turbine (4) comprises a chamber wall (30) with an array of coolant channels (60) formed therein. Supply manifolds (50) are coupled to the coolant channel inlets for directing bypass air through the channels, where the bypass air removes heat from the chamber wall, and discharge manifolds (52) are coupled to the coolant channel outlets for discharging the heated bypass air to the turbine (10). The coolant channels are spaced and distributed throughout the combustor liner so that the coolant flows through a substantial portion of the liner. The coolant channels are minute channels with relatively short flow paths to minimize both the pressure drop and the quantity of bypass air required to cool the wall. In addition, the channels are completely enclosed within the chamber wall to significantly improve the heat transfer characteristics of the combustor liner. Because the chamber wall is cooled convectively, without bleeding air directly into the combustion chamber, the combustor liner is particularly suited for fuel-rich combustors, such as the first stage of a two stage low NOx combustor.
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Franklin Jerrold E.
Schoenman Leonard
Aerojet - General Corporation
Freay Charles G.
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