| CW | Compression work (unit: kJ) |
| DP | Design-point |
| EW | Expansion work (unit: kJ) |
| FPT | Free power turbine |
| FPTW | Free power turbine work |
| GT | Gas turbine |
| HP | High pressure |
| HPC | High pressure compressor |
| HPCW | High pressure compressor work |
| HPT | High pressure turbine |
| HPTW | High pressure turbine work |
| IC | Intercooled cycle |
| ICR | Intercooled/recuperated |
| Inter | Intercooler |
| ISA | International standard atmosphere |
| ISA Dev | International standard atmosphere deviation |
| LP | Low pressure |
| LPC | Low pressure compressor |
| LPCW | Low pressure compressor work |
| LPT | Low pressure turbine |
| OD | Off-design point |
| OEM | Original equipment manufacturer |
| OPR | Overall pressure ratio |
| PR | Pressure ratio |
| SC | Simple cycle |
| SLS | Sea level static |
| TET | Turbine entry temperature (unit: K) |
| TURBOMATCH | Gas turbine engine performance model code |
| USAF | United State Air Force |
| c | Specific heat (unit: kJ/kg) |
| cp | Specific heat at constant pressure (unit: kJ/kg) |
| H | Specific enthalpy (unit: kJ/kg) |
| P | Total pressure (unit: N/m2) |
| Q | Heat flow (unit: kW) |
| qin | Heat flow in (unit: kW) |
| qout | Heat flow out (unit: kW) |
| S | Entropy (unit: kJ/kgK) |
| SFC | Specific fuel consumption (unit: kg/MWs) |
| T | Total temperature (unit: K) |
| Greek letters | |
| η | Efficiency (unit: %) |
| ηth | Thermal efficiency (unit: %) |
| ηc | Compressor isentropic efficiency (unit: %) |
| ηT | Turbine isentropic efficiency (unit: %) |
| Subscripts | |
| P | At constant pressure |
| Th | Thermal |
| In | Inlet |
| Out | Outlet |
| Regen | Regeneration |
| 1, 2, 3, 4, 5, 6, 7, i | Engine components station numbers |