Air Flow Calculation for Orifices: Diameter and Length Requirements

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SUMMARY

The discussion focuses on calculating air flow through orifices with diameters of 1mm, 1.2mm, and 1.5mm at room temperature and atmospheric pressure of 1013 mbar, with back pressures of 100 mbar and 200 mbar. Participants recommend using the "Daniel orifice flow calculator" for flow rate calculations, although it primarily supports pipe dimensions. The Bernoulli's energy equation is suggested as a method to determine flow rates for the specified orifice sizes without requiring outer diameter measurements.

PREREQUISITES
  • Understanding of Bernoulli's equation
  • Familiarity with orifice flow principles
  • Knowledge of pressure measurement units (mbar)
  • Basic proficiency in using flow calculation software
NEXT STEPS
  • Research the application of Bernoulli's equation in fluid dynamics
  • Explore the "Daniel orifice flow calculator" for practical use
  • Study the effects of varying back pressure on flow rates
  • Investigate other flow calculation methods for orifices
USEFUL FOR

Engineers, fluid dynamics specialists, and anyone involved in designing or analyzing air flow systems through orifices will benefit from this discussion.

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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