US 12,168,960 B2
Gas turbine engine
Ravindra Shankar Ganiger, Bengaluru (IN); and Nagashiresha Gontla, Bengaluru (IN)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jul. 24, 2023, as Appl. No. 18/357,349.
Claims priority of application No. 202311033937 (IN), filed on May 15, 2023.
Prior Publication US 2024/0384687 A1, Nov. 21, 2024
Int. Cl. F02C 7/18 (2006.01); F02C 9/00 (2006.01)
CPC F02C 9/00 (2013.01) [F02C 7/185 (2013.01); F05D 2270/053 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method comprising:
operating an engine at a takeoff power level, wherein operating the engine at the takeoff power level comprises operating a low pressure system of the engine at a first speed (N1) and operating a high pressure system of the engine at a second speed (N2),
wherein the high pressure system comprises a high pressure compressor defining a high pressure compressor exit area (AHPCE) at a high pressure compressor exit and a high pressure turbine defining a high pressure turbine inlet area (AHPTI) at a high pressure turbine inlet,
wherein the engine defines a PIQHPTI equal to a mass flow through the high pressure turbine inlet while operating the engine at the takeoff power level, corrected to standard day conditions, times the high pressure turbine inlet area,
wherein the engine defines a PIQHPCE equal to a mass flow through the high pressure compressor exit while operating the engine at the takeoff power level, corrected to standard day conditions, times the high pressure compressor exit area,
wherein the engine defines a total sea level static thrust output, FnTotal, corrected to standard day conditions, and
wherein operating the engine at the takeoff power level further comprises operating the engine with a power performance indicator quantity (PIQPower) in a range of 1400 pounds per square inch (lbs/in2) to 2500 lbs/in2, wherein the power performance indicator quantity is determined according to:

OG Complex Work Unit Math