Parametric Savonius Model

thingiverse

It seems you've provided a long code snippet written in OpenSCAD, which is a 3D modeling language. I'll help you break it down and provide a high-level explanation of what each part does. ### Header Comments The first lines are comments explaining the origin of the code (`http://en.wikipedia.org/wiki/Savonius_wind_turbine`) and providing information about variable definitions. ```lua |\n//|or http://en.wikipedia.org/wiki/Savonius_wind_turbine |\n//+----------------------------------------------------------+ ``` These comments aren't part of the code but serve as metadata for readers. ### Variable Definitions The next few lines define variables using a syntax where `=` is used for assignment. For example: ```scad Diametre_base=100; ecart=16; // central Gap - ecart (e) ``` Here, `Diametre_base` and `ecart` are set to 100 and 16, respectively. ### Modules OpenSCAD uses a modular programming style. Modules define reusable code blocks that can be imported into the main script or other modules. The main structure of this script involves four primary modules: `savonius`, `rotor2`, `base`, and `dumymotor`. #### savonius() Module ```scad module savonius(){ base(); rotor2(); } ``` The `savonius` module calls two other modules: `base()` and `rotor2()`. #### rotor2() Module ```scad module rotor2(){ for (i=[1:n_pale]) { color([0.5+sin(10i)/2,0,1/i]){ rotate([0,0,i(360/n_pale)]) { ... ``` This module is a complex function that performs the following operations: - It uses a `for` loop to iterate `n_pale` times. - Each iteration adds a color to a part of the turbine. The color seems to be based on sine and linear calculations, possibly creating an aesthetic effect rather than directly influencing the geometry or performance. The `rotate()` function rotates an object around the y-axis by 360 degrees divided by `n_pale`, essentially positioning each blade properly. - It includes a complex linear extrusion (`linear_extrude()`) operation, likely creating the shape of each turbine blade. The specifics involve subtracting shapes (`difference()`) that seem to create gaps or rounded edges in the blades. #### base() Module ```scad module base(){ difference(){ color("CadetBlue") { union(){ cylinder(r=Diametre_base/2, h=epaisseur); ``` This module creates the base structure of the turbine. It includes: - Creating a difference operation (`difference()`). - Color-setting for aesthetics. - Adding three cylinders of increasing size (via `union()`) that form the outer structure. #### dumymotor() and poulie() Modules ```scad module dumymotor(){ color("grey")cylinder(r=Motor_Espacement_Holder/2+epaisseur,h=10*epaisseur); color("black")cylinder(r=Motor_Diametre_Holder/2,h=13*epaisseur); } ``` ```scad module poulie(){ difference(){ color("Blue"){ union() { ... ``` These modules seem to define structures related to the motor or gearing within a wind turbine but are incomplete as their actual function and variable usage suggest dependencies on variables not defined in this snippet (e.g., `Motor_Espacement_Holder` and `Savonius_Diametre_Base/6`).