Air Flow Calculation for Orifices: Diameter and Length Requirements

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To calculate the air flow through orifices of diameters 1mm, 1.2mm, and 1.5mm at room temperature and pressures of 100 mbar or 200 mbar, the Bernoulli's energy equation can be applied. A suggested tool for flow rate calculations is the "Daniel orifice flow calculator," although it primarily requires pipe dimensions. The discussion emphasizes the need to focus on orifice dimensions without considering outer diameters. Accurate calculations depend on understanding the pressure differential and the specific characteristics of the orifice. Utilizing these methods will yield the necessary volume flow rates for the specified conditions.
irisaa
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Hallo,
How to calculate the air flow (volume flow in m3/s) through an orifice of diameter ∅ 1mm, 1.2 mm and 1.5 and length 1mm? The air at room temperature is sampled through the orifice from atmosphere at pressure 1013 mbar. The pressure behind the orifice is regulated at 100 mbar or 200 mbar.
Thank you for your help
 
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Hi, there's a nice free program that will help you calculate the flow rate. Google "Daniel orifice flow calculator". You'll need an internal pipe size to complete the calculation. :smile:
 
Thank you but thus program works for pipe only with inner and outer diameter included as beta coefficient.
My question concerns only nozzle (orifice) of ∅ 1mm, 1.2 mm and 1.5 mm with no outer diameter.
 
You can use the Bernoulli's energy equation to solve for the flow noting that it is constant.
 

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