Patent ID: 11867089
Assignee: ROLLS-ROYCE NORTH AMERICAN TECHNOLOGIES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. A gas turbine engine comprising
a combustor including an outer combustor case and an inner combustor case that cooperate to define a combustion chamber, the inner combustor case formed to define at least one cooling passage that extends through the inner combustor case and opens into a cavity to allow a primary flow of air from within the combustion chamber to the cavity, and
a cooling air system including a cooling duct and a valve, the cooling duct coupled with the outer combustor case of the combustor and arranged to extend along the inner combustor case to define a transfer passageway in fluid communication with the combustion chamber and the cavity, and the valve coupled with the outer combustor case of the combustor,
wherein the valve is configured to selectively control fluid communication between the cooling duct and the combustion chamber to modulate auxiliary air flow conducted into the cavity from the combustion chamber via the transfer passageway during operation of the gas turbine engine to selectively supplement the minimum amount of cooling air,
wherein the entire valve is located radially outward of the outer combustor case.