Air Flow Pressure Drop

  • Thread starter Futsal1st
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  • #1
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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
 

Answers and Replies

  • #2
russ_watters
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It would depend on the characteristics of the opening. Is it a louver of some sort? Can you test it?
 
  • #3
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Its a louvred roller door.
 
  • #4
russ_watters
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Is it pre-manufactured? Can you look up its characteristics? And you didn't answer my other question...
 
  • #5
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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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