Lenoir cycle

The Lenoir cycle is an idealised thermodynamic cycle for the pulse jet engine. An ideal gas undergoes

1. constant volume heating
2. reversible adiabatic expansion.
3. isobaric compression to the volume at the start of the cycle.

The expansion process is isentropic and hence involves no heat interaction. Energy is absorbed as heat during the constant volume process and rejected as heat during the constant pressure process.