Some nozzle dev

scad/nozzle/Prefilm.scad

 
-//use <../impl/preview.scad>;
+use <../Piping.scad>;
 
+$fs  = 0.30;
+$fa  = 0.30;
+$E   = 0.01;  // ε
+$str = 3.00;
 
-$E = 0.01;  // ε
 
 
 
-module PrefilmNozzle() {
+module PrefilmNozzle (
 
+  nozzle_l       = 30.0,
 
+  prefilm_r      =  3.0,
+  gas_outlet_r   =  3.0,
+  fluid_outlet_r =  3.0,
 
-}
+) {
+
+
+  nozzle_od = ( fluid_outlet_r + prefilm_r + gas_outlet_r + $str ) * 2;
+
+  echo(nozzle_od=nozzle_od);
+
+
+  module NozzleProfile() {
+    difference() {
+      circle(r=fluid_outlet_r + prefilm_r);
+      circle(r=fluid_outlet_r);
+    }
+
+    difference() {
+      circle(d=nozzle_od);
+      circle(r=fluid_outlet_r + prefilm_r + gas_outlet_r);
+    }
+  }
+
+
+  edge_d = nozzle_od / 2;
+
+  _wh = nozzle_od + 2*$str;
+
+
+  difference() {
+
+    union() {
+
+      translate([-_wh/2, -$str, -edge_d/2 - nozzle_od/2 - $str])
+        cornerPipeLayOnFace(width=_wh, height=_wh, diameter=edge_d, angle=90, radius=_wh/2, strength=$str, center=true, inner=true, outer=true);
 
+      translate()
+        rotate()
+        cylinder(d=0);
 
+    }
 
 
-if ($preview) {
 
-  PrefilmNozzle();
+
+  }
+
+
+
+
+
+  // linear_extrude(nozzle_l, convexity=4)
+  //   NozzleProfile();
+
 
 
 }
 
 
+
+
+// if ($preview) {
+
+  PrefilmNozzle (
+    fluid_outlet_r = 2.0,
+    gas_outlet_r = 1.5,
+    prefilm_r = 2.0
+  );
+
+
+// }
+
+