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Air Flow Pressure Drop

  1. Mar 27, 2016 #1
    How do I determine the pressure drop of air across an opening? For example if I have 3,000 L/s (3 m3/s) and an opening of 8.4 m2 I know the velocity is 0.4 m/s. If the free area is 80%, the velocity increases to 0.45 m/s. What I'd like to cal is the pressure drop in each case.

    Cheers
     
  2. jcsd
  3. Mar 27, 2016 #2

    russ_watters

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    Staff: Mentor

    It would depend on the characteristics of the opening. Is it a louver of some sort? Can you test it?
     
  4. Mar 27, 2016 #3
    Its a louvred roller door.
     
  5. Mar 28, 2016 #4

    russ_watters

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    Staff: Mentor

    Is it pre-manufactured? Can you look up its characteristics? And you didn't answer my other question...
     
  6. Mar 28, 2016 #5
    Sorry 'bout that.

    Its a car park roller door that has small openings (almost rectangular)about 5mm high and 50mm long. It acts like a perforated panel between the outdoor and the car park.
     
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