Vertical Wind Turbine - Parametric

cults3d

https://youtu.be/174mBODh06w This is a parametric VAWT design that can produce straight or helical turbines of any NACA4 foil profile. Lift-type VAWTs struggle to start from standstill, so you may include drag-type Savonius turbine scoops. Foil smoothness also affects VAWT performance - be sure to sand them down. You can choose 4 arms for a more stable design or 3 arms with less airflow obstruction. Print as many bracket arms as needed and the corresponding upper and lower disks. Connect the arms to the upper and lower disks with 20mm M3 screws and locking nuts. There are additional vertical holes to attach a generator assembly above or below the turbine assembly. The included .stl files use 4 ball bearings of 608 type, which fit nicely into the upper and lower disks. The order of parts from ground to sky is: - 608 bearing - bracket disk lower - 608 bearing - nut, tightened against the bottom segment of the turbine - bottom segment of the turbine - nut, slotted into the bottom segment of the turbine - nut, tightened against the previous nut - open rod - nut, tightened against the next nut - nut, slotted into the top segment of the turbine - top segment of turbine - nut, tightened against the top segment of the turbine - 608 bearing - bracket disk lower - 608 bearing - 2 nuts tightened against each other, resting gently on the top 608 bearing. You can download and print the .stl files or generate your own VAWT using the included OpenSCAD file. Simply change a constant in the file to alter the number of blades, their shape, height, rotation, angle of attack, etc. OpenSCAD may seem daunting, but it's easy to use. This design was inspired by https://www.thingiverse.com/thing:16504, but created from scratch without viewing his code. There's a wealth of information online about optimizing VAWT parameters like NACA profile, number of foils, angle of foils, height, etc. The files here use NACA2018 based on several papers I read, but other profiles may have merit. If this topic interests you, you might enjoy: 1) Analysis of Different Blade Architectures on small VAWT Performance, L. Battisti, A. Brighenti, E. Benini, M. Raciti Castelli, Journal of Physics: Conference Series 753 (2016) 062009 2) http://www.amics21.com/laveritat/savonius_generator_english.pdf