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Originally Posted by redleader
Is that a contrarotating fan? I remember reading about them ages ago and wishing someone would try applying it to PC sized fans. It'll be interesting to see if theres any gains over standard axial.
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As I understand it you can picture the airflow from a fan like so:
Picture a ceiling fan,blowing down, above a spiral staircase.
The staircase is the path the air molecules actually follow.
The contra rotating fans straighten out the airflow so that, in the above example, the air blows straight down.
In an aircraft it helps a lot to have the thrust going strait back.
I suppose this will help in ducted fan situations: (shorter path = less resistance = higher flow)
And to get cooler air to the bottem of the fins on certain heatsinks. (depends on design)
The pics seem to indicate that this design's advantage is that the airflow is directed towards the centre, eliminating the dead spot??
Love to see a review.
Interesting links!
