Wall elements for gas turbine engine combustors
First Claim
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1. A double wall combustor arrangement of a gas turbine engine, the arrangement comprising:
- an external wall comprising a liner;
an internal wall comprising a plurality of overlapping tiles, the internal and external walls in respect to a combustion chamber of the gas turbine engine, an upstream tile overlapping a downstream tile and defining a gap and an outlet therebetween;
a coolant flow passes during use through said gap and exits the outlet to provide a coolant film across at least a part of the downstream tile; and
a plurality of projections being provided on an outer surface of the tiles to facilitate heat transfer to the coolant flow during use, wherein the outlet has a smaller dimension normal to the downstream tile than the gap to increase the velocity of the coolant flow across the downstream tile during use.
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Abstract
A combustor wall element arrangement for a gas turbine engine comprises an upstream wall element (50A) overlapping a downstream wall element (50B) and defining a gap (37) and an outlet (35) therebetween. In use, a coolant flow exits the outlet (35) to provide a coolant film (D) across at least a part of the downstream wall element (50B). The outlet (35) has a smaller dimension, normal to the downstream wall element (50B), than the gap (37) thereby increasing the velocity of the coolant flow across at the downstream wall element (50B). The resultant film coolant flow is effective further across the downstream wall element.
24 Citations
16 Claims
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1. A double wall combustor arrangement of a gas turbine engine, the arrangement comprising:
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an external wall comprising a liner; an internal wall comprising a plurality of overlapping tiles, the internal and external walls in respect to a combustion chamber of the gas turbine engine, an upstream tile overlapping a downstream tile and defining a gap and an outlet therebetween; a coolant flow passes during use through said gap and exits the outlet to provide a coolant film across at least a part of the downstream tile; and a plurality of projections being provided on an outer surface of the tiles to facilitate heat transfer to the coolant flow during use, wherein the outlet has a smaller dimension normal to the downstream tile than the gap to increase the velocity of the coolant flow across the downstream tile during use. - View Dependent Claims (2, 3, 10, 11, 12, 13, 14, 15, 16)
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4. A double wall combustor arrangement of a gas turbine engine, the arrangement comprising:
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an external wall comprising a liner; an internal wall comprising a plurality of overlapping tiles, the internal and external walls in respect to a combustion chamber of the gas turbine engine, an upstream tile overlapping a downstream tile and defining a gap and an outlet therebetween; a coolant flow passes during use through said gap and exits the outlet to provide a coolant film across at least a part of the downstream tile; and a plurality of projections being provided on an outer surface of the tiles to facilitate heat transfer to the coolant flow during use, wherein the outlet has a smaller dimension normal to the downstream tile than the gap to increase the velocity of the coolant flow across the downstream tile during use, and wherein the upstream and downstream tiles define a convergent portion leading to the outlet. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification