Kaplan turbines · 25 m head · 6 blades (ESHA statistics)
Kaplan turbine runner 750 mm, 6 blades (25 m head)
Model designed and computed with the Heliciel software. Design point: 25 m net head, 4.13 m³/s flow, 878.2 rpm (hydraulic power 1013 kW). Operating point and hub from the Kaplan statistics of the ESHA guide (specific speed n_QE = 0.480 at 25 m head); runner computed by Heliciel. Runner balanced on the head by Heliciel's turbine study (wicket gate and pre-swirl included); hydraulic geometry: the blade root fillet still has to be sized for strength.
The pack contains the complete propeller as a full-definition STL with root fillet, STEP surfaces (complete propeller and one blade), the Heliciel .hlc project and the computation records.
Characteristics computed by Heliciel
| Diameter | 750 mm |
|---|---|
| Number of blades | 6 |
| Hub diameter | 337.6 mm |
| Net head | 25 m |
| Flow | 4.13 m³/s |
| Specific speed n_QE (ESHA statistics) | 0.480 |
| Head taken by the runner | 22.73 m |
| Losses in wicket gate, bend and draft tube | 2.28 m |
| Wicket gate | 10 guide vanes, b0 255 mm |
| Design speed | 878 rpm |
| Fluid speed at design point | 11.72 m/s |
| Axial load | 66243.91 N |
| Torque | 9700.938 N·m |
| Shaft power | 891942 W |
| Power coefficient Cp | 0.84 |
| Blade shape | classic |
| Angles of attack | smoothed (6° along the whole blade) |
| Blade root | junction shank 84.2 × 46.6 mm |
| Bore | 67 mm |
| Hub length | 200 mm |
| Blade thickness | 10.6 mm at the root, 10.6 mm at mid-radius (r = 168.8 mm), 23.4 mm at the tip |
| Strength at design point | blade root fillet to be sized for strength |
| Direction of rotation | right-hand |
| Files included | STL, STEP, HLC |
| Reference | K-750-6p |
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This model was designed and computed with the Heliciel software. For a custom propeller there are two ways: the Heliciel software (Windows: computation, 3D view, STL and STEP exports), and the Heliciel MCP connector, which lets your AI assistant — ChatGPT, Claude, Le Chat and any MCP client — compute a real propeller, with a free 1-day discovery pass.
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