Methods and systems for cooling a transition nozzle

摘要

A turbine assembly includes a fuel nozzle configured to mix fuel and air and a transition nozzle oriented to receive the fuel and air mixture from the fuel nozzle. The transition nozzle includes a transition portion and a nozzle portion integrally formed with the transition portion. The transition nozzle includes a plurality of openings oriented to channel air to facilitate cooling the transition portion and/or the nozzle portion. The transition portion is oriented to channel combustion gases towards the nozzle portion.

主权项

1. A method of assembling a turbine assembly, said method comprising:
integrally forming a transition nozzle including a transition portion and a turbine nozzle portion, wherein integrally forming includes manufacturing the transition nozzle as a unitary component such that the transition nozzle is a monolithic piece, and wherein the turbine nozzle portion functions as a stage one turbine nozzle; orienting a plurality of openings in a sidewall of the transition nozzle to channel air across an inner surface of the transition nozzle to facilitate cooling at least one of the transition portion and the turbine nozzle portion, the transition nozzle including the plurality of openings; and orienting the transition portion to channel combustion gases downstream towards the turbine nozzle portion; and injecting fuel through at least one secondary fuel injector coupled along an axial length of the transition nozzle.