US 12,442,303 B1
Method of mitigating rotor bow in a turbine engine rotor
Christian M. Fernholz, Liberty Township, OH (US); and Clay Sven Norrbin, Liberty Township, OH (US)
Assigned to GENERAL ELECTRIC COMPANY, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Apr. 10, 2024, as Appl. No. 18/631,471.
Int. Cl. F01D 5/10 (2006.01); F01D 19/02 (2006.01)
CPC F01D 5/10 (2013.01) [F01D 19/02 (2013.01); F05D 2260/85 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.