Thread: Radiator Shroud
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Old 04-16-2018, 02:58 PM
Marc Bourget Marc Bourget is offline
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Join Date: May 2013
Location: North Ca
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The better designs in OEM applications will show what I'm referencing.

The "box" behind the core can be square, the second corner to the back of the box can also be 90 degs. It's when you go to exit the box.

What you show is a cylinder. the corner from the back of the box should be 1-1/2" or greater radius. The fan, from the side has a depth because of the pitch of the blades. Good placement of the fan is 1/2 the depth of the pitch into the opening or shroud exit. The idea is to trim the fan, originally somewhat larger than the opening, to match the curvature of the exit.

The tighter you can keep the clearance between fan tips and shroud, the better the efficiency of air movement. Tough for an engine driven fan mounted to the block/water pump. Easy for a remotely mounted fan.

I have a ring binder and power-point for my Cooling lectures but I can't locate them right now. I've attached a quick sketch.

I should've said "trim" rather than "sculpting" :^)
Attached Files
File Type: pdf Fan-Shroud Dwg.pdf (9.4 KB, 57 views)
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