Calculating the total energy at the nozzle inlet for a turbojet engine involves considering the enthalpy and kinetic energy of the incoming air before combustion.
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.