Hi Folks,
           What are your thoughts on simple (ish ) ways of conditioning
the output of a fan to give a nice smooth air flow for testing an
ultrasonic anemometer? I'm not too fussed about absolute speed accuracy,
it's more having a nice smooth source to test the stability of the
direction sensing that I'm interested in.

Something like the Dyson Air Multiplier:
  http://www.dyson.co.uk/store/fans.asp=20
 looks like it might make an off the shelf solution but might be
difficult to get bought (or to keep hold of once the office sees it!  ).

Tube full of straws to induce laminar flow?  Just a long tube to let
things "settle down"  after the blades?

Any input welcome :)

Cheers,

Robin Bussell.




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