초록 ▼

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 b

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.

대표청구항 ▼

[ What is claimed is:] [1.] A combustor comprising:a casing enclosing a combustion chamber for flow of combustion gases along a hot gas flow direction; anda combustor liner surrounding at least a portion of the combustion chamber and having coolant channels formed therein, the coolant channels arran

[ What is claimed is:] [1.] A combustor comprising:a casing enclosing a combustion chamber for flow of combustion gases along a hot gas flow direction; anda combustor liner surrounding at least a portion of the combustion chamber and having coolant channels formed therein, the coolant channels arranged transversely relative to the hot gas flow direction and distributed over the combustor liner in a substantially uniform manner, each said coolant channel terminating at one end in an inlet and at the other end in an outlet;a supply flow passage common to a plurality of said coolant channels and in fluid communication therewith through said inlets;a discharge flow passage common to a plurality of said coolant channels and in fluid communication therewith through said outlets; andmeans for directing coolant into said supply flow passage.