RECUPERATOR FOR GAS TURBINE ENGINE

摘要

A recuperator inserted in the exhaust duct of a gas turbine engine includes a casing surrounding a core having spiral cross channels. Inlet and outlet openings are defined in the casing for the passage of hot exhaust gases through the exhaust channels in the core. Feeder members extend radially across the outlet opening for passing the pre-combustion stage air through the air channels of the core, and header members extend radially across the inlet opening of the casing for receiving and redirecting air from the air channels in the core towards the combustor section. The feeder and header members each have a tapered configuration from the casing to the axial center of the casing so as to maintain a relatively constant pressure over the radial extent of the respective feeders and headers.

主权项

1. A gas turbine engine having a compressor section, a combustor section and a turbine section with a gas exhaust duct downstream of the turbine section, the gas turbine engine further comprising a recuperator disposed in the gas exhaust duct, the recuperator including a casing of circular cross-section surrounding at least a core having spiral cross channels including pre-combustion stage air channels and exhaust channels for directing hot gases from the turbine section into heat exchange relationship with pre-combustion stage air passing through respective cross channels, and inlet and outlet openings defined in the casing for the passage of said hot exhaust gases through the exhaust channels in the core, feeder members extending radially across the outlet opening for passing the pre-combustion stage air through the air channels of the core, and header members extending radially across the inlet opening of the casing for receiving and redirecting air from the air channels in the core towards the combustor section, the feeder and header members each having a tapered configuration from the casing to the axial center of the casing so as to maintain a relatively constant pressure over the radial extent of the respective feeders and headers.