The thermal efficiency (η_th) of a gas turbine engine represents how effectively the engine converts the thermal energy from fuel combustion into useful mechanical work or thrust. It’s a critical parameter in aircraft design because it directly impacts the engine’s fuel efficiency and overall performance.
The formula for thermal efficiency is defined as:
- η_th is the thermal efficiency, expressed as a decimal or percentage.
- Useful Work Output represents the mechanical work or thrust produced by the engine. This is typically measured in watts (W) or newtons (N).
- Energy Input from Fuel is the total energy released by burning the fuel in the engine. This is measured in joules (J) or British thermal units (BTU).