초록 ▼

A gas turbine engine includes a compressor, combustor, and high pressure turbine operatively joined together. The turbine includes a nozzle followed by a row of rotor blades. A first bleed circuit is joined in flow communication between the last stage of the compressor and a forward cooling channel

A gas turbine engine includes a compressor, combustor, and high pressure turbine operatively joined together. The turbine includes a nozzle followed by a row of rotor blades. A first bleed circuit is joined in flow communication between the last stage of the compressor and a forward cooling channel in vanes of the nozzle for feeding first cooling holes therein with pressurized primary air at a first pressure. A second bleed circuit is joined in flow communication between an intermediate stage of the compressor and aft cooling channels in the nozzle vanes to feed second cooling holes with pressurized secondary air at a second pressure less than the first pressure.

대표청구항 ▼

We claim: 1. A gas turbine engine comprising:a fan, compressor, combustor, high pressure (HP) turbine, and low pressure turbine in serial flow communication;said compressor including rows of compressor blades for pressurizing air sequentially in corresponding stages;said HP turbine including a nozzl

We claim: 1. A gas turbine engine comprising:a fan, compressor, combustor, high pressure (HP) turbine, and low pressure turbine in serial flow communication;said compressor including rows of compressor blades for pressurizing air sequentially in corresponding stages;said HP turbine including a nozzle having a row of stator vanes followed by a row of rotor blades;each of said vanes having circumferentially opposite pressure and suction sides extending in span radially and in chord axially between opposite leading and trailing edges, and being hollow with an imperforate septum bridging said opposite sides to define forward and aft cooling channels feeding corresponding first cooling holes along said leading edge and second cooling holes along said trailing edge;a first bleed circuit joined in flow communication between a last stage of said compressor and said vane forward channels to provide thereto pressurized primary air at a first pressure; anda second bleed circuit joined in flow communication between an intermediate stage of said compressor and said vane aft channels to provide thereto pressurized secondary air at a second pressure less than said first pressure.