59 lines
1.7 KiB
OpenSCAD
59 lines
1.7 KiB
OpenSCAD
// ======== Global Parameters ======== //
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$fn = 75;
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inlet_segments = 60;
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outlet_segments = 20;
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// ======== Venturi Geometry ======== //
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inlet_length = 250;
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outlet_length = 350;
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inlet_radius = 300;
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throat_radius = 80;
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outlet_radius = 110;
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wall_thickness = 5;
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inlet_curve_factor = 2;
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outlet_curve_factor = 1.5;
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// ======== Stacking Function ======== //
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module stacked_shell(length, r_end, thickness, segments, curve_factor, is_outer = true) {
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for (i = [0:segments - 1]) {
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h = length / segments;
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t0 = i / (segments - 1);
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t1 = (i + 1) / (segments - 1);
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r1 = throat_radius + (r_end - throat_radius) * pow(t0, curve_factor);
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r2 = throat_radius + (r_end - throat_radius) * pow(t1, curve_factor);
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if (!is_outer) {
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r1 = r1 - thickness;
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r2 = r2 - thickness;
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}
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translate([0, 0, i * h])
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cylinder(h = h, r1 = r1, r2 = r2);
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}
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}
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// ======== Inlet Module ======== //
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module inlet() {
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difference() {
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union()
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stacked_shell(inlet_length, inlet_radius, wall_thickness, inlet_segments, inlet_curve_factor, true);
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union()
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stacked_shell(inlet_length, inlet_radius, wall_thickness, inlet_segments, inlet_curve_factor, false);
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}
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}
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rotate([0, -90, 0]) inlet();
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// ======== Outlet Module ======== //
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module outlet() {
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difference() {
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union()
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stacked_shell(outlet_length, outlet_radius, wall_thickness, outlet_segments, outlet_curve_factor, true);
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union()
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stacked_shell(outlet_length, outlet_radius, wall_thickness, outlet_segments, outlet_curve_factor, false);
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}
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}
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rotate([0, 90, 0]) outlet(); |