An aerospike engine is a type of rocket engine that uses a unique nozzle design called an aerospike to improve performance at different altitudes. In the context of an aerospike engine, the “nozzle exit” is the perimeter of the aerospike, which forms a bell-like shape. The total energy at the nozzle exit can be expressed as the kinetic energy of the exhaust gases.
The total energy () at the nozzle exit can be expressed as:
where,
- E is the Total Energy, i.e sum of kinetic and potential energy
- Â is the static enthalpy at the nozzle exit,
- Â is the velocity of the exhaust gases relative to the reference frame of the exhaust gases