Air cooling systems for gas turbine engines

Rotary kinetic fluid motors or pumps – Including additional means causing or controlling fluid flow... – Means subjected to or is working fluid

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415116, 60 3907, 60 3983, F01D 2508

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active

046574824

ABSTRACT:
A gas turbine engine in which a rotating component (such as a turbine shaft or disc) is cooled by directing preswirled air at it by flowing the air along a passageway defined by the rotating component and a static wall. To reduce the viscous drag on the swirling air due to the presence of the static wall, the static wall is transpired to cause the boundary layer of air adjacent the wall to move in the same direction as the swirling air. The wall may be transpired by sucking or blowing air through air passages through the wall.

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Esgar et al; Review of Status, Methods and Potentials of Gas Turbine Air Cooling, Research Publication NACA (1955).

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