GAS TURBINE ENGINE STALL MARGIN MANAGEMENT

摘要

A method for operating a gas turbine engine having a starter-electric generator driven by one of a plurality of shafts of the gas turbine engine is provided. The method includes determining a desired amount of thrust to be produced by the gas turbine engine, as well as a desired amount of electrical power to be drawn from the starter-electric generator of the gas turbine engine. The method operates the gas turbine engine to produce the desired amount of thrust, while drawing less than the desired amount of electrical power from the starter-electric generator. Drawing less than the desired amount of electrical power from the starter-electric generator allows for the desired amount of thrust production, allows for the desired amount of thrust production more quickly, or allows for maintenance of a stall margin for any purpose (such as to increase an efficiency of the engine or to allow for certain engine designs).

主权项

1. A method for operating a multi-shaft aeronautical gas turbine engine having an electrical machine, the electrical machine including a starter-electric generator driven by at least one of the shafts of the gas turbine engine, the method comprising:
determining a desired amount of thrust to be produced from the gas turbine engine; determining a desired amount of electrical power to be drawn from the starter-electric generator of the gas turbine engine; producing the desired amount of thrust using the gas turbine engine; and drawing less than the desired amount of electrical power from the starter-electric generator of the gas turbine engine to allow the gas turbine engine to produce the desired amount of thrust, to produce the desired amount of thrust more quickly, or to maintain a stall margin.