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Unread 07-10-2007, 10:48 AM   #21
billbartuska
Cooling Savant
 
Join Date: Jun 2005
Location: Skokie, Illinois
Posts: 322
Default Re: Which goes first? the Fan or the Radiator?

On the "push" side of the fan the airflow tends to move in a spiral. The motor also blocks some of the airflow. This doesn't happen on the "pull" side though.

Depending on the fan design, and how it is mounted, this may or may not effect performance. Generally, a shroud lessens these effects.
Attached Images
File Type: jpg Fan Spiral.jpg (59.0 KB, 13 views)
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