Calculating Air Flow on exit of pipe where inlet is orifice.

Forum about flow calculators available on pipeflowcalculations.com and how to find solution for your fluid flow problem.
Post Reply
muhayyuddin
Posts: 1
Joined: Sat Apr 19, 2014 12:27 pm

Calculating Air Flow on exit of pipe where inlet is orifice.

Post by muhayyuddin » Sat Apr 19, 2014 1:04 pm

Dear All ! Good day.
Pls consider the following case:-
I have a pressure head of 40 bar from where I'm giving an inlet via a small pipe of 10mm dia to a large Pipe of 250mm dia. Inlet of large pipe is made closed with a plate provided only a center bore of 10mm (for passing small pipe through it). While if the valve is fully opened, I take 40 bar as P1 and pressure obtained at exit of large pipe, measured by transducer as P2. Now guide me pls for the following,
1- I'm calculating Air Mass Flow Rate at the exit of large pipe by using "Q = Density x A x v" with density = 1.225, v = sqrt(2x(p1-p2)/density) and A = 3.14/4 x (0.250)sqr. is it OK..?
2- I want to achieve a mass flow rate of 6kg/sec at the end of large pipe. What should be my inlet pressure (P1) for that ?
3- Can i suppose the flow isentropic..? Density can be assumed constant or I should go for compressible fluid flow equations..?

admin
Site Admin
Posts: 371
Joined: Mon Feb 08, 2010 7:47 pm

Re: Calculating Air Flow on exit of pipe where inlet is orif

Post by admin » Sun Apr 20, 2014 12:25 pm

I think that with orifice calculator you can calculate it easily.
http://www.pipeflowcalculations.com/orifice/
Pipe flow calculations - since 2000

Post Reply