Ideal Brayton-cycle thermal efficiency given pressure ratio and specific-heat ratio - the air-standard LM2500/MGT baseline.
Formula
$$ \eta_{Brayton} = 1 - \frac{1}{r_p^{(k-1)/k}} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $r_p$ | Compressor pressure ratio | - | engine spec |
| $k$ | Specific-heat ratio | - | air ≈ 1.4 |
Sources
- Cohen, Rogers & Saravanamuttoo - Gas Turbine Theory.