Mass flow rate from an opening in a pressurized cylinder

[Ebyate]

Would appreciate if anyone could help me to find the mass flow rate from a 4" opening from a cylinder that is pressurized with air at 5 bar . The size of the cylinder is 24" and length is 600 mtr

 

[goutam_freelance]

Is the pressure constant or will reduce with time on discharge?

Engineers, think what we have done to the environment !

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[LittleInch]

There are two relevant FAQs

https://www.eng-tips.com/faqs.cfm?fid=1201

https://www.eng-tips.com/faqs.cfm?fid=1864

I think this is a fixed volume of air so what you have here is a transient issue as mass flow rate will start to fall from the start over time.

A 600 metre long 24" thing is not called a "cylinder", it's called a pipeline section...

But note that the flow will be sonic and a 4" opening will be very noisy and have very high velocity.

Can you give us a bit more here please?

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