Single Phase 05
1
A piping network is illustrated in the figure below.
Water is pumped from a reservoir via two identical, parallel
pump trains to a point characterized by a discharge pressure P
dis
.
A static sight tube is located at a point along the
discharge line.
a) Develop the equations necessary to determine the liquid height H
2
in the sight tube
b) Give a step by step solution procedure for determining H
2
.
If a portion of the solution is iterative, it is sufficient
to simply state this.
You may assume the only local losses are those represented by the loss coefficients K
1
and K
2
, both of which are
referenced to the velocity in the converged piping segments.
You may also assume the friction factor is a known
function of the Reynolds number.
Sight Tube
P
H
L
d
K
atm
dis
p
1
2
3
4
Δ
SOLUTION
If
o
P
is the pressure at the base of the sight tube, then the height of the water in the sight tube is related to
o
P
by
g
P
P
H
gH
P
P
atm
o
atm
o
ρ
−
=
⇒
+
=
2
2
In addition,
o
P
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '08
 Doster
 Fluid Dynamics, Mass, Flux, Fundamental physics concepts, sight tube

Click to edit the document details