VUB Wind Tunnel Build threads
From
Part 7:
Quote:
The diffuser morphs the airflow from the rectangular section to the round inlet of the fan.
This proved to be the most complex part to build. Though the contraction duct was larger and heavier, the wall sheets only had to be bent in one plane. This was easy and required little force.
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Squircles!
11kw fan, ten meters long. It's 2 tons on casters so they can move it. Used by University students and the designer of the
Aeromodeller2.