초록 ▼

A geared turbofan gas turbine engine has a fan rotor carrying a plurality of fan blades driven by a gas generator via a gear assembly. A fan casing which has an exterior surface is positioned coaxially with and encloses the fan rotor. A lubricant supply is provided to lubricate and cool the gear ass

A geared turbofan gas turbine engine has a fan rotor carrying a plurality of fan blades driven by a gas generator via a gear assembly. A fan casing which has an exterior surface is positioned coaxially with and encloses the fan rotor. A lubricant supply is provided to lubricate and cool the gear assembly and a heat exchanger is provided to cool the lubricant. An air scoop forms a first duct which supplies air to the heat exchanger to cool the lubricant. A second duct defined partially by the air scoop downstream of the heat exchanger and an annular chamber formed coaxially supplies air warmed in the fan casing by the heat exchanger to the exterior surface of the fan casing for deicing or anti-icing purposes. The air scoop and heat exchanger can be positioned on the fan casing, the gas generator casing or a pylon. A valve in the air scoop controls the flow of warmed air to the second duct.

대표청구항 ▼

A geared gas turbine engine comprising a gas generator, at least one rotor carrying a plurality of blades, a gear assembly, a surface to be deiced, the at least one rotor being driven by the gas generator via the gear assembly, a lubricant supply to lubricate and cool the gear assembly, a heat excha

A geared gas turbine engine comprising a gas generator, at least one rotor carrying a plurality of blades, a gear assembly, a surface to be deiced, the at least one rotor being driven by the gas generator via the gear assembly, a lubricant supply to lubricate and cool the gear assembly, a heat exchanger to cool the lubricant for the gear assembly, an air scoop having an upstream end and a downstream end, the upstream end of the air scoop forming an intake opening, the downstream end of the air scoop forming an outlet opening, the air scoop including a first duct means downstream of the heat exchanger, said first duct means supplying air warmed by the heat exchanger to said surface of the geared gas turbine engine to be deiced, the air scoop including a second duct means to convey air warmed by the heat exchanger to the outlet opening, a valve means mounted in the air scoop downstream of the heat exchanger, the valve means having a first position and a second position, the valve means being movable between the first position in which substantially all the warmed air is supplied via said first duct means to said surface of the geared gas turbine engine and the second position in which substantially all the warmed air is supplied via said second duct means to the outlet at the downstream end of the air scoop.