US 11,702,952 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 Nov. 11, 2021, as Appl. No. 17/524,196.
Prior Publication US 2023/0141059 A1, May 11, 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)] 20 Claims
OG exemplary drawing
 
1. An engine control system comprising a non-transitory memory device and a processor, wherein the non-transitory 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 a turbomachine during a non-started state, the method comprising:
determining a thermal bias-value, wherein the thermal bias-value comprises a difference between an upward temperature-value and a downward temperature-value, the upward temperature-value corresponding to a first one or more temperature measurements of an upward portion of the turbomachine and the downward temperature-value corresponding to a second one or more temperature measurements of a downward portion of the turbomachine;
performing a cooling treatment based at least in part on the thermal bias-value, wherein the cooling treatment comprises at least one of: circulating air through at least a portion of the turbomachine, and rotating a shaft of the turbomachine with a motoring system;
as a result of performing the cooling treatment, deactivating the cooling treatment such that the cooling treatment has an inactive operating state; and
as a result of the cooling treatment having the inactive operating state, setting an engine start status to an enabled operating state.