Patent ID: 7921653
Filing Date: 2011-04-12
Classification: F01D

Abstract:
1. A combustor for a turbine comprising: a combustor liner; a first flow sleeve encircling said combustor liner to define a first flow annulus therebetween, said first flow sleeve having at least one cooling aperture formed about a circumference thereof for directing compressor discharge air as cooling air into said first flow annulus; a casing surrounding said first flow sleeve with a second flow annulus therebetween, said first flow sleeve having at least one air extraction opening formed about a circumference thereof for directing at least some of said compressor discharge air that has been directed into said first flow annulus as cooling air, from said first flow annulus directly into said second flow annulus as extraction air; and an extraction port operatively coupled to said casing for extracting said extraction air from said second flow annulus.