Help in determining airflow

[ajerold]

I'm trying to calculate the airflow in a compressed air pipe. I know the pressure reading from the gauge and the pipe diameter. Is there an equation I can use to find the CFM with what I have. I know I can use the equation Airflow = Velocity x Area but I don't know what the velocity is. Is there a relationship between pressure and velocity? Can someone help?

Thanks

 

[MikeHalloran]

You need two gages, on either side of an orifice, or on either end of a long run of pipe that you can analyze .



Mike Halloran
Pembroke Pines, FL, USA

 

[katmar]

If you know the pressures at the start and end of the pipe, plus you have the pipe length and ID, and the air physical properties (density and viscosity) you can use the compressible flow equations to calculate the flowrate.

Katmar Software
Engineering & Risk Analysis Software

http://katmarsoftware.com

 

[FeX32]

Yes. It is essential to have both of the pressures. Then, utilize conservation of energy.


Fe