US 12,305,518 B2
Thermal bias control in turbomachines
Constantinos Minas, Slingerlands, NY (US); Harry Kirk Mathews, Jr., Clifton Park, NY (US); Gregory Alexander Natsui, Schenectady, NY (US); and Lana Maria Osusky, Rexford, NY (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jun. 27, 2023, as Appl. No. 18/341,905.
Application 18/341,905 is a continuation of application No. 17/524,196, filed on Nov. 11, 2021, granted, now 11,702,952.
Prior Publication US 2023/0340888 A1, Oct. 26, 2023
Int. Cl. F01D 19/02 (2006.01); F01D 25/12 (2006.01)
CPC F01D 19/02 (2013.01) [F01D 25/12 (2013.01); F05D 2220/323 (2013.01); F05D 2260/232 (2013.01); F05D 2260/85 (2013.01); F05D 2270/112 (2013.01); F05D 2270/3032 (2013.01)] 17 Claims
OG exemplary drawing
 
16. A turbomachine, comprising:
a core engine comprising a shaft, and a compressor stage and a turbine stage coupled to the shaft;
one or more sensors respectively configured to determine temperature measurements from at least one of an upward portion of the turbomachine and a downward portion of the turbomachine;
a motoring system coupled to the shaft, the motoring system configured to rotate the shaft; and
an engine control system comprising a non-transitory memory device and a processor, wherein the memory device comprises computer-executable instructions, which when executed by the processor, cause the engine control system to perform a method of controlling thermal bias in the turbomachine during a non-started state, the method comprising:
determining, using a thermal bias model, a thermal bias-value based on a plurality of temperatures measured about a circumference of the shaft of the turbomachine;
determining, using a projection model, a projection value for the thermal bias-value at a future time, wherein the projection value corresponds to a defined time period, the defined time period selected at least in part to allow the cooling treatment to be initiated before the thermal bias-value exceeds an upper control limit;
generating a model output based on the thermal bias-value, the model output structured to alter an operating condition associated with the turbomachine; and
performing a cooling treatment based at least in part on the model output, wherein the cooling treatment comprises at least one of: circulating air through at least a portion of the turbomachine, and rotating the shaft of the turbomachine with the motoring system.