Number of Buckets (\( N_b \)):

\[ N_b = 0.5 \cdot \frac{D_{\text{run}}}{D_n} + 15 \]

Where:

• \( N_b \) is the number of buckets.
• \( D_{\text{run}} \) is the runner diameter, in meters (m).
• \( D_n \) is the nozzle diameter, in meters (m).