CE 374 FLUID MECHANICS

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24 Οκτ 2013 (πριν από 3 χρόνια και 10 μήνες)

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CE 374 FLUID MECHANICS
:

Example problem on pipe system curve


Water is pumped between two reservoir in a pipeline with the following characteristics:
D=300 mm,
l
=70 m, f=0.025, K
m
=2.5.
Determine the discharge
,

Q and pump head
,

H
p
for t
he
elevation difference of 15 m, if the

pump characteristic curve is approximated by the formula





















H
P

(m), Q(m
3
/s)








SOLUTION:








































(Large reservoir assumptions are valid)



















































































(





)













(SYSTEM
CURVE)








































(PUMP CURVE)







Graphical Solution:





P


1


2

0
5
10
15
20
25
30
0
0.1
0.2
0.3
0.4
0.5
Hp
(m)

Q

(m
3
/s)

pump
curve
Two equations will be solved
simultaneity to find intersectio
n of
the two curves