Cooling cover for gas turbine damping resonator

A damping resonator cooling apparatus for a gas turbine component comprising:

• a resonator comprising walls welded to a liner of the component;
• a top wall of the resonator separated from the liner by a first height;
• air inlet holes in the top wall of the resonator;
• air outlet holes through the liner from the resonator;
• a cover enclosing the resonator with an airflow clearance between the cover and the resonator;
• and
• a portion of the cover extending upstream from an upstream wall of the resonator and forming a coolant inlet chamber comprising a top wall spaced from the liner by less than the first height;
• wherein when a compressed air surrounds the cover at a higher pressure than a pressure of a working gas within the liner, the coolant inlet chamber accelerates a flow of the compressed air over a weld of the upstream wall of the resonator to the liner.

A damping resonator cooling apparatus comprising:

• a cover enclosing a vibration damping resonator on a liner of a working gas path of a gas turbine component, the cover providing an airflow clearance between the cover and the resonator;
• a coolant inlet chamber extending upstream from the cover relative to a working gas flow;
• wherein a top wall of the coolant inlet chamber is closer to the liner than is a top wall of the resonator;
• and
• wherein the coolant inlet chamber is configured to receive a compressed gas surrounding the cover at a higher pressure than the working gas, and to accelerate the compressed gas over an upstream weld of the resonator to the liner.