Parallel pipeline flow rate

Feb 2017
4
0
Hello to everybody,

The problem is given here:



My diagram is here:



Per problem question, do we need to find Q2 and Q3 which is governed by Q1=Q2+Q3?

I am also stuck with the absence of data for viscosity and diameter. How to manage them?

Can we express the equation given in the problem in terms of heads?

Thanks
 
Last edited:

ChipB

PHF Helper
Jun 2010
2,361
289
Morristown, NJ USA
You can determine a value for \(\displaystyle \frac {d^4}{\mu}\) from the intial data of Q, L, and \(\displaystyle \Delta p\). Then after the 2nd pipe is added you have:

\(\displaystyle Q = \frac {\pi d^4 (\Delta P_1)}{128 \mu (12.8\ Km)} = 2 \frac {\pi d^4 (\Delta P_2)}{128 \mu (19.2\ Km)}\)

Combine this with \(\displaystyle \Delta P_1 + \Delta P_2 = 34\ bar \)

and you can solve for Q.
 
Feb 2017
4
0
You can determine a value for \(\displaystyle \frac {d^4}{\mu}\) from the intial data of Q, L, and \(\displaystyle \Delta p\). Then after the 2nd pipe is added you have:

\(\displaystyle Q = \frac {\pi d^4 (\Delta P_1)}{128 \mu (12.8\ Km)} = 2 \frac {\pi d^4 (\Delta P_2)}{128 \mu (19.2\ Km)}\)

Combine this with \(\displaystyle \Delta P_1 + \Delta P_2 = 34\ bar \)

and you can solve for Q.
Thanks a lot for your help.