Method of mitigating rotor bow in a turbine engine rotor
AssigneeGeneral Electric Company
InventorsChristian M. Fernholz, Clay Sven Norrbin
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Abstract
A method of mitigating rotor bow in a rotor of a turbine engine. The method includes determining thermal rotor bow in the rotor, determining non-thermal rotor unbalance in the rotor by monitoring the response at the bowed rotor mode of the rotor, and determining a time period for motoring the rotor prior to operation of turbine engine, wherein the time period is based on a combination of the thermal rotor bow and the non-thermal rotor unbalance. The method also includes motoring the rotor for the time period and until the vibration of the rotor is below a predetermined acceptable value.
Claims20
A method of mitigating rotor bow in a rotor of a turbine engine, the method comprising:
- determining thermal rotor bow in the rotor;
- determining non-thermal rotor unbalance in the rotor by monitoring a response of the rotor at a bowed rotor mode of the rotor;
- determining a time period for motoring the rotor prior to operation of the turbine engine, wherein the time period is based on a combination of the thermal rotor bow and the non-thermal rotor unbalance;
- and
- motoring the rotor for the time period until the response of the rotor is below a predetermined acceptable value.
Dependencies are inferred from the claim text.