Cooling chamber for upstream weld of damping resonator on turbine component

摘要

A cover (54, 54A-B) enclosing with clearance (65) an acoustic damping resonator (24) on a working gas path liner (22) of a gas turbine component (28). The cover includes a coolant inlet chamber (56, 56B) with a top wall (58, 58B) that is closer to the liner than a top wall (32) of the resonator, and extends upstream from the resonator relative to the working gas flow (48). Compressed air (26) surrounds the cover at a higher pressure than the working gas and flows (44) into and through the coolant inlet chamber, then through holes (34) in the resonator, then exits through holes (38) the liner into the working gas. The coolant inlet chamber directs the flow of compressed air over a weld (50) of the upstream wall (40) of the resonator to cool it. The cover may be formed as a box (57) or a sleeve (69).

主权项

1. A damping resonator cooling apparatus comprising:
an acoustic damping resonator comprising a resonating cavity enclosed by resonator walls welded to a liner bounding a flow path of a turbine working gas; a cover enclosing the resonator and providing an airflow clearance between the cover and the resonator; and a portion of the cover forming a coolant inlet chamber that is upstream of a resonator upstream wall of the resonator walls relative to a flow direction of the turbine working gas in the flow path; wherein when a compressed air surrounds the cover at a higher pressure than a pressure of the working gas, the compressed air passes into the coolant inlet chamber through an inlet of the coolant inlet chamber and flows past an upstream weld of said resonator upstream wall to the liner.