Wind turbine, experiment on the effect of the number of rotor blades and their angle of attack on the performance.
thingiverse
I designed this project for my son's school assignment (Fip NWA, Scientific Examination in Natural Sciences). More details will be added later. For OpenSCAD to work, you'll need the NACA Airfoils library from Parkinbot: https://www.thingiverse.com/thing:898554 Many thanks to Parkinbot for this valuable library. You can print it with 2 to 6 rotor blades and adjust the angles as needed. The rotor blades are attached via a bayonet joint, and all parts are designed to be printed without support material. In our situation, we've determined that the transmission with the belt drive is unnecessary or has excessive friction loss. Therefore, use the direct drive option and attach the rotor directly to an engine with a 2mm shaft. As of now, I'm unable to share the results of the experiment. However, feel free to conduct your own experiment and find out for yourself! UPDATE_1 I've added an extra rotor blade with a different profile, as well as two hubs with varying angles of attack.
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