Perhaps you may find useful suggestions also on an old EPE magazine article
(February 2003) written by the regretted John Becker: a Wind Tunnel.

regards,
Marco



----- Original Message -----=20
From: "Robin D. Bussell" <RobinB@excelerate.info>
To: <piclist@mit.edu>
Sent: Tuesday, December 06, 2011 5:05 PM
Subject: [OT] Air flow smoothing for anemometer test rig suggestions sought


> 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
> 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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