Thermal bias control in turbomachines

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 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 the 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 the upward portion of the turbomachine and the downward temperature-value corresponding to a second one or more temperature measurements of the 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 the shaft of the turbomachine with the 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 an inactive operating state, setting an engine start status to an enabled operating state.

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 an inactive operating state, setting an engine start status to an enabled operating state.