Alternative Radiator Shroud
 

I've been trying to come up with a different radiator shroud design, and here's the result.

It's mostly designed to fit oddly shaped radiators. I needed a more compact shroud for a design I'm working on.

http://members.rogers.com/seyeklopz/shroud.jpg

Huh?
Maybe an explanation would help. The core is the white or the black part?

The solid black is a fan. Black outline is the heater core. Blue outline is the shroud. That mesh is the heatercore fins.

The main function is to pull air through the parts of the core not covered by the fan. Because of the way the fins of the core only let air pass straight through, you can make a connection between part of the fan covered area and the uncovered area.

Air flows from the corners of the heatercore opposite the fan direction, then through the fan.

I used different colors in this image, because I wanted to make the air arrows blue...

http://members.rogers.com/seyeklopz/shroudflow.jpg

Yes, that'll work.

A purist would tell you that you're recirculating warm air, but it's not over the whole area, so the impact ought to be negligeable, given sufficient airflow.

Just make sure that it doesn't reflow beyond that.

I want to make it clear that the other side of the fan is connected to a blow hole, so none of the air exiting the fan will hit the core again. All the air entering the core is from the case.

I've noticed some people prefer to use air from outside the case. I've decided to do it this way because I want cool air to hit my hard drives, chipset, memory and my radeon which are still air cooled. And I'll have a passive air cooled 102 watt power supply on the bottom of my case.

Sounds fine.

Would you be able to make something that looks like a jet plane's engine cowl? that seems to be the popular theme these days...

LOL

Maybe.

I could put a model airplane prop on the shroud side, 326 CFMs should make it spin.

Gawds, if I had the fan that high, my ribbon cables would rip out :( Good thing I'm not running it at 28 Watts.

with over twice the restriction on the ends I question how much air will you pull through the ends