Combustor and method of reducing thermal stresses in a combustor

摘要

A combustor 14 includes a combustion chamber 38 and a casing 28 that circumferentially surrounds the combustion chamber to at least partially define an annular passage 56 between the casing 28 and the combustion chamber 38. A fuel plenum 72 extends radially through the casing to provide fluid communication through the casing to the annular passage, and a liner 52 extends inside at least a portion of the fuel plenum 72 to prevent fuel from directly impinging upon at least a portion of the fuel plenum 72. A method of reducing thermal stresses in a combustor 14 includes flowing a fuel inside a fuel plenum 72 that extends radially through a casing 28, shielding at least a portion of the fuel plenum 72 from direct impingement by the fuel radially inward of the casing 28, and flowing the fuel from the fuel plenum 72 into an annular passage 56 between the casing and a combustion chamber 38.