Aft frame and method for cooling aft frame

摘要

An aft frame and a method for cooling an aft frame are disclosed. In one embodiment, an aft frame for a transition piece in a combustor is disclosed. The combustor includes the transition piece and an impingement sleeve at least partially defining a flow path therebetween. The aft frame includes a body and a generally radially extending cooling passage defined in the body, the cooling passage comprising a first end configured to accept a coolant. The aft frame further includes an exhaust passage defined in the body, the exhaust passage including a first end in communication with the cooling passage and a second end configured for communication with the flow path for flowing the coolant therethrough.

主权项

1. An aft frame for a transition piece in a combustor, the combustor comprising the transition piece and an impingement sleeve at least partially defining a flow path therebetween, the aft frame comprising:
a body, the body comprising an upper portion, a lower portion, a left side portion, and a right side portion; a generally radially extending cooling passage defined in one of the left side portion or the right side portion of the body, the cooling passage comprising a first end configured to accept a coolant; a cooling slot defined in the body and extending generally about a portion of the periphery of the body, the cooling slot defining an opening configured to accept a coolant; a plurality of exhaust passages defined in the body, at least one of the plurality of exhaust passages comprising a first end in direct communication with the cooling passage and a second end configured for communication with the flow path for flowing the coolant therethrough and at least another of the plurality of exhaust passages comprising a first end in communication with the cooling slot and a second end configured for communication with the flow path for flowing the coolant therethrough; a seal extending across the opening of the cooling slot; and an access hole defined in the seal to allow coolant flow therethrough and into the cooling slot through the opening of the cooling slot.