Patent ID: 11913388
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 14:
15. A method of operating a cabin blower and rotor bow mitigation system of a gas turbine engine of an aircraft,
the gas turbine engine comprising the cabin blower and rotor bow mitigation system,
the cabin blower and rotor bow mitigation system comprising:
a cabin blower compressor mechanically coupled to one or more spools of the gas turbine engine;
an electric machine mechanically coupled to the cabin blower compressor; and
a controller configured to control the cabin blower and rotor bow mitigation system so that:
in a cabin blower mode of operation, rotation of the cabin blower compressor is mechanically driven by the one or more spools, wherein the rotation of the cabin blower compressor in the cabin blower mode compresses air received through a manifold and provides a compressed output flow of air for delivery to a cabin of the aircraft;
in a rotor bow mitigation mode of operation, rotation of the cabin blower compressor is driven by the electric machine using electrical power from an electrical power source, wherein the rotation of the cabin blower compressor in the rotor bow mitigation mode sucks or blows a flow of air through a core of the gas turbine engine to remove heat from the core;
the method comprising:
during flight of the aircraft, using power extracted from the one or more spools of the gas turbine engine of the aircraft, driving the cabin blower compressor to provide the compressed output flow of air to the cabin of the aircraft; and
after shutting down the engine, using the electric machine powered by the electrical power from the electrical power source, driving the cabin blower compressor to provide the flow of air through the core of the gas turbine engine to remove heat from the core.