US 12,460,584 B2
Surge recovery system and methods
Michael M. Romero, Manchester, CT (US); and Gary Collopy, Vernon, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on May 1, 2024, as Appl. No. 18/652,699.
Application 18/652,699 is a division of application No. 17/867,507, filed on Jul. 18, 2022, granted, now 12,000,345.
Application 17/867,507 is a division of application No. 16/783,731, filed on Feb. 6, 2020, granted, now 11,448,138, issued on Sep. 20, 2022.
Prior Publication US 2024/0301834 A1, Sep. 12, 2024
Int. Cl. F02C 9/16 (2006.01); F02C 7/32 (2006.01)
CPC F02C 9/16 (2013.01) [F02C 7/32 (2013.01); F05D 2270/101 (2013.01); F05D 2270/62 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A single spool gas turbine engine comprising:
a power source;
a first compressor section;
a first turbine section;
a combustor section between the first compressor section and the first turbine section;
a first shaft operably coupling the first compressor section and the first turbine section, wherein the first compressor section, the first turbine section, and the first shaft provide a first rotor system;
a controller configured to collect or synthesize data from a sensor from at least one of the first rotor system and the combustor section;
a first electric motor disposed on a second shaft operably coupled to the first rotor system via a geared interface, the first electric motor configured to provide a power assist to the first shaft in response to a surge event in the first compressor section, wherein the controller is configured to:
detect the surge event for the first compressor section of the gas turbine engine;
determine, by a predefined multivariable table dependent on at least one of sensed engine parameters, synthesized engine parameters, or time elapsed since detecting the surge event, an amount of power to apply to the first shaft of the gas turbine engine;
increasing a power provided to the first shaft by the amount of power determined by the predefined multivariable table;
monitoring a magnitude of the power commensurate with a severity of the surge event and loss in thrust due to the increasing of the power;
adjusting the magnitude of the power commensurate with the severity of the surge event and loss in thrust due to the increasing of the power; and
increasing a stability margin of the first compressor section in response to the adjusting.