| Brayton cycle | BCY |
| CCC | Convergent combustion chamber |
| CTHR | Constant-temperature heat reservoir |
| FPDT | Finite Physical Dimensions Thermodynamics |
| FTT | Finite time thermodynamics |
| HCD | Heat conductance distribution |
| IHP | Isothermal heating process |
| OPO | Optimization objective |
| RCC | Regular combustion chamber |
| VTHR | Variable-temperature heat reservoir |