초록 ▼

A gas turbine engine comprises a compressor, a combustion system and a turbine, the compressor and the turbine being interconnected by a shaft. The combustion system has an initial diffusing section and duct means are provided to convey cooling air from at least part way down the diffusing section,

A gas turbine engine comprises a compressor, a combustion system and a turbine, the compressor and the turbine being interconnected by a shaft. The combustion system has an initial diffusing section and duct means are provided to convey cooling air from at least part way down the diffusing section, to the turbine. At least one aperture is provided in the duct means and adapted to allow part of the cooling air to flow forwardly of the shaft on its outer surface to cool it.

대표청구항 ▼

A gas turbine engine comprising: a compressor, combustion system, and turbine in flow series, adjacent static structure defining a compressor discharge duct positioned directly between a downstream extremity of said compressor and an upstream extremity of said combustion system, said compressor disc

A gas turbine engine comprising: a compressor, combustion system, and turbine in flow series, adjacent static structure defining a compressor discharge duct positioned directly between a downstream extremity of said compressor and an upstream extremity of said combustion system, said compressor discharge duct having at least a portion thereof spaced from said compressor to define a gap therebetween, a shaft drivingly interconnecting said compressor and said turbine, said combustion system having an initial diffusing section serving to diffuse air compressed by said compressor, duct means having an inlet arranged at a location at least part way along said diffusing section and an outlet to said turbine, said duct means conveying cooling air from the main flow of the engine and discharging a first part of said cooling air through said outlet to said turbine without cooling intervening structure of a combustion chamber, and at least one aperture from said duct means to discharge a second part of said cooling air around the outside of said shaft for forward flow along said shaft to cool the same and then be discharged through said gap directly into the compressor discharge duct and the main flow of air therein from said compressor for recirculation by the compressor air.