Crossflow Banki Turbine Sizing Calculator

Small & Micro Hydropower: Size Banki-Michell crossflow runners, nozzle throat width, rotational speed, and power output.

Net Head $H_{net}$ (m):

Discharge $Q$ ($m^3/s$):

Runner Outer Diameter $D_1$ (m):

Nozzle Jet Angle $\alpha_1$ (deg):

Nozzle Coeff $C_v$:

Overall Turbine Eff $\eta$ (%):

Admission Angle Arc $\theta_0$ (deg):

Electrical/Shaft Power

-- kW

Runner Speed ($N$)

-- rpm

Runner Width ($B$)

-- m

Jet Velocity ($V_0$)

-- m/s

• Optimal Peripheral Speed ($u_1$): -- m/s

• Runner Inner Diameter ($D_2 = 0.66 D_1$): -- m

• Blade Inlet Angle ($\beta_1$): -- °

• Blade Exit Angle ($\beta_2$): -- °

• Runner Aspect Ratio ($B / D_1$): --

• First Stage Power Contribution: ~72 - 75%

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