AUXILLARY POWER UNIT ASSEMBLY AND A METHOD OF USING THE SAME

摘要

A gas turbine auxiliary power unit system for an aircraft comprises an aircraft cabin provided with a pressurised air supply, a gas turbine engine comprising a compressor assembly, and a controller.;The pressurised air supply is provided to the aircraft cabin through an aircraft cabin air inlet, and exhausted from the aircraft cabin through an aircraft cabin air exhaust, while the gas turbine engine is provided with an inlet air flow from the aircraft cabin air exhaust.;The controller is operable to control a flow rate of a fuel supplied to the gas turbine engine responsive to a power demand on the auxiliary power unit, and also to restrict an inlet air flow into the gas turbine engine, so as to maintain an air pressure inside the aircraft cabin within a pre-determined range.

主权项

1. A gas turbine auxiliary power unit system for an aircraft, the system comprising:
an aircraft cabin provided with a pressurised air supply; a gas turbine engine comprising a compressor assembly; and a controller, wherein the pressurised air supply is provided to the aircraft cabin through an aircraft cabin air inlet, and exhausted from the aircraft cabin through an aircraft cabin air exhaust, the gas turbine engine is provided with an inlet air flow from the aircraft cabin air exhaust, and the controller is operable to control a flow rate of a fuel supplied to the gas turbine engine responsive to a power demand on the auxiliary power unit, the controller being further operable to restrict an inlet air flow into the gas turbine engine, so as to maintain an air pressure inside the aircraft cabin within a pre-determined range.