| CPC F01D 17/16 (2013.01) [F05D 2220/32 (2013.01)] | 15 Claims |
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1. A blower assembly for providing air to an airframe system, comprising:
a rotor configured to be mechanically coupled to a spool of a gas turbine engine;
a flow modifier configured to receive and/or direct flow to the rotor;
wherein the blower assembly is configured to permit relative movement between the rotor and the flow modifier to move between:
a compressor configuration in which the rotor is configured to be driven to rotate by the spool and to receive and compress air from the gas turbine engine, and discharge the compressed air for supply to the airframe system; and
a turbine configuration in which the rotor is configured to receive air from an external air source to drive the spool to rotate;
wherein the flow modifier comprises:
a diffuser vane array comprising a plurality of diffuser vanes and configured to act together with the rotor to compress the air received at the rotor in the compressor configuration;
a nozzle guide vane array comprising a plurality of nozzle guide vanes and configured to act together with the rotor to expand the air received at the nozzle guide vane array in the turbine configuration; and
an actuator arrangement configured to:
cause relative axial movement between the rotor and the diffuser vane array so that the diffuser vane array is disposed around the rotor for operation in the compressor configuration; and
cause relative axial movement between the rotor and the nozzle guide vane array so that the nozzle guide vane array is disposed around the rotor for operation in the turbine configuration.
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