The GE9X engine is a high-bypass turbofan jet engine developed by General Electric for use on large commercial aircraft, specifically the Boeing 777X. In the context of a turbofan engine like the GE9X, the term “nozzle exit” refers to the point where the high-speed exhaust gases exit the engine’s jet nozzle. The total energy at the nozzle exit can be expressed as the sum of the enthalpy and kinetic energy of the exhaust gases.
n turbofan engines like the GE9X, the primary thrust is generated by the bypass flow of air around the engine core. The core engine, which includes combustion and a high-pressure turbine, produces a high-speed exhaust jet. The bypass air and the core exhaust are mixed, contributing to the overall thrust.
The total energy () at the nozzle Inlet can be expressed as:
where,
- E is the Total Energy, i.e sum of kinetic and potential energy
- is the Static Enthalpy at nozzle Inlet,
- is the velocity of the incoming air relative to the reference frame of the engine