Rolls-royce Corporation

Robert John Irving

Marko Bacic

Leo Vivian Lewis

Guy David Snowsill

A gas turbine is provided for an aircraft comprising an engine core and a core flow path, a fan, a front drum cavity arranged radially inward of the core flow path, and a front bearing chamber. The front drum cavity comprises a front drum inlet, for providing air to the front drum cavity from the core air flow, located downstream of a stage of the compressor, and a front drum outlet, for ejecting air from the front drum cavity to the fan air flow, located axially between the fan and the compressor. The front drum inlet is through a seal, and the front drum outlet is through a spaced gap.

Gas turbine engine

A fluid system comprising a surface that is fluid washed in use by a fluid flow travelling substantially parallel to the surface is disclosed. The system has a first port through the surface and a second port through the surface, the first and second ports having respective first and second port inlets that are substantially flush with the fluid washed surface. The first and second port inlets are stacked in a direction parallel to the normal flow of fluid over the fluid washed surface such that the first port is upstream of the second port and fluid travelling closer to the fluid-washed surface entering into the first port tends to entrain fluid travelling further from the fluid-washed surface for entry into the second port.

Fluid system

A gas turbine engine comprising first and second axially spaced turbine rotor stages () and a turbine casing () radially outside the rotor stages. A first seal segment arrangement () forms a cavity () radially between the first turbine rotor stage () and the turbine casing (). A first air source () is coupled to the first seal segment arrangement (). A second seal segment arrangement () forms a cavity () radially between the second turbine rotor stage () and the turbine casing (). A heating chamber () is provided radially between the second seal segment arrangement () and the turbine casing (). A duct () is coupled between the first air source () and the heating chamber ().

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Derby, United Kingdom

Robert John Irving