GAS TURBINE ENGINE WITH TRANSMISSION AND METHOD OF ADJUSTING ROTATIONAL SPEED

摘要

A method of adjusting a rotational speed of the low pressure compressor rotor(s) of a gas turbine engine, including rotating the high pressure compressor rotor(s) with the high pressure turbine rotor(s) through the high pressure spool, rotating the low pressure turbine rotor(s) with a flow of exhaust gases from the high pressure turbine, rotating the low pressure spool with the low pressure turbine rotor(s), rotating a load of the engine with the low pressure spool, driving a rotation of the low pressure compressor rotor(s) with the low pressure spool through a variable transmission defining a variable transmission ratio between rotational speeds of the compressor rotor(s) and the low pressure spool, and adjusting the transmission ratio to obtain a desired rotational speed for the low pressure compressor rotor(s). A method of adjusting rotational speeds of a gas turbine engine and a gas turbine engine are also described.

主权项

1. A method of adjusting a rotational speed of at least one low pressure compressor rotor of a gas turbine engine having independently rotatable low pressure and high pressure spools, the method comprising:
rotating at least one rotor of a high pressure compressor of a core section of the engine with at least one rotor of a high pressure turbine of the core section through the high pressure spool; rotating at least one rotor of a low pressure turbine with a flow of exhaust gases from the high pressure turbine section; rotating the low pressure spool with the at least one rotor of the low pressure turbine; rotating a load of the engine with the low pressure spool; driving a rotation of the at least one low pressure compressor rotor with the low pressure spool through a variable transmission defining a variable transmission ratio between rotational speeds of the at least one compressor rotor and of the low pressure spool; and adjusting the transmission ratio to obtain a desired rotational speed for the low pressure compressor rotor.