η_O = (J · KT) / (2π · KQ). Peak open-water efficiency of a typical merchant propeller 0.60–0.72.
Formula
$$ \eta_O = \frac{J \cdot K_T}{2\pi \cdot K_Q} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $J$ | Advance ratio | - | input |
| $KT$ | Thrust coefficient | - | input |
| $KQ$ | Torque coefficient | - | input |
| $\eta_O$ | Open-water efficiency | - | result |
Sources
- Carlton - Marine Propellers and Propulsion.