I'm working on a project that requires concentrating air flow into a beam such that it can travel longer distances through an unconstrained medium (i.e. open space, not a hose).

Something that came to mind are those little air nozzles that you find on air planes. These seem to do a pretty good job of directing air through a narrow path such that it doesn't effect nearby passengers.

What kind of mechanism is used to maintain this tight air flow?

  • $\begingroup$ suggest you ask this question on the aviation stack exchange. $\endgroup$ Jan 3, 2018 at 22:59
  • $\begingroup$ @nielsnielsen I was unsure where to post this but ultimately posted here since I assumed it was fluid dynamics related. $\endgroup$
    – Izzo
    Jan 3, 2018 at 23:24
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    $\begingroup$ it is indeed, but it is more engineering-related than theoretical. the aviation exchange has a good mixture of both sorts of experts, and they are helpful people. $\endgroup$ Jan 4, 2018 at 1:29
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    $\begingroup$ @Izzo I've had luck with a fluid dynamics question in Engineering SE. I think it could go either way in Aviation SE, it is an equipment question rather than a passenger experience question, so it might work. $\endgroup$
    – uhoh
    Mar 17, 2019 at 23:20

1 Answer 1


The first trick is to get the air molecules flowing in just one direction. You can do this by forcing them through a 'bundle of straws' rather than one tube.

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    $\begingroup$ That's an interesting concept, similar to collimating light but with air. $\endgroup$
    – Izzo
    Jan 3, 2018 at 23:23
  • $\begingroup$ @Izzo They're called straightners I believe, for use in wind tunnels. $\endgroup$
    – DKNguyen
    May 12, 2021 at 18:45

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