Venturi cooling system
First Claim
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1. A combustor for a gas turbine comprising:
- a nozzle assembly located at a first end of the combustor;
a combustion chamber defined within the combustor, downstream of the nozzle assembly;
a venturi positioned within the combustor and defining a transition between the first end and the combustion chamber, the venturi having an internal passageway therein, the internal passageway having a first portion extending towards the first end and a second portion extending towards the combustion chamber;
a compressed air source directed into a cooling inlet, the cooling inlet in fluid communication with the first and second portions of the internal passageway,the internal passageway directing the compressed air from the source in opposite directions along the first portion and second portion for cooling the venturi; and
a secondary passageway communicating with a downstream end of the second portion of the internal passageway, wherein the air flow moving through the second portion of the internal passageway into the secondary passageway is reversed in direction and directed towards the first end of the combustor.
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Abstract
A combustor for a gas turbine is provided having a nozzle assembly located at one end and a combustion chamber defining a second end of the combustor. A venturi is positioned within the combustor, between the nozzle and the combustion chamber. The venturi defines an internal passageway therein having a first side facing the nozzle and a second side facing the combustion chamber. Compressed air is directed into an inlet in fluid communication with the first and second sides of the internal passageway. The internal passageway directs the compressed air from the inlet in opposite directions within the first and second sides of the internal passageway for cooling the venturi.
119 Citations
15 Claims
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1. A combustor for a gas turbine comprising:
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a nozzle assembly located at a first end of the combustor; a combustion chamber defined within the combustor, downstream of the nozzle assembly; a venturi positioned within the combustor and defining a transition between the first end and the combustion chamber, the venturi having an internal passageway therein, the internal passageway having a first portion extending towards the first end and a second portion extending towards the combustion chamber; a compressed air source directed into a cooling inlet, the cooling inlet in fluid communication with the first and second portions of the internal passageway, the internal passageway directing the compressed air from the source in opposite directions along the first portion and second portion for cooling the venturi; and a secondary passageway communicating with a downstream end of the second portion of the internal passageway, wherein the air flow moving through the second portion of the internal passageway into the secondary passageway is reversed in direction and directed towards the first end of the combustor. - View Dependent Claims (2, 3, 4, 5, 6, 12)
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7. A combustor for a gas turbine comprising:
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a nozzle assembly located at a first end of the combustor; a combustion chamber defined within the combustor, downstream of the nozzle assembly; a venturi positioned within the combustor and defining a transition between the first end and the combustion chamber, the venturi having an internal passageway therein, the internal passageway having first and second portions on opposing sides of an apex of the venturi; a cooling inlet for a compressed air flow, the cooling inlet in fluid communication with the first and second portions of the internal passageway, and the compressed air from the cooling inlet is directed within the internal passageway in opposite directions within the first and second portions for cooling the venturi; and a secondary passageway communicating with a downstream end of the second portion of the internal passageway, wherein the air flow moving through the second portion of the internal passageway into the secondary passageway is reversed in direction and directed towards the first end of the combustor. - View Dependent Claims (8, 9, 10, 11)
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13. A venturi within a gas turbine combustor comprising:
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an upstream angled side, a downstream angled side, an apex positioned between the upstream and downstream sides and a cooling air inlet between angled sides for supplying cooling air proximate the apex; a first passageway directing cooling air from the inlet along an inner surface of the downstream angled side and then reversed in direction upstream thereof along a liner; a second passageway directing cooling air from the inlet along the upstream angled side; and a cooling discharge directing cooling air from the second passageway into the combustor, upstream of the apex of the venturi. - View Dependent Claims (14, 15)
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Specification