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danny_smith
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Homework Statement
Liquid, specific density 0.8, flows with velocity 4 m/s
in a pipe that has a downward slope of 1:50. At a
certain point in the pipe, a pressure gauge shows a
pressure of 80 kPa. Determine the pressure at a
point 200 m downstream of the gauge if:
flow losses are ignored;
and,there is a flow loss equal to 10% of the total
initial head.
Homework Equations
Bernoulli equation
The Attempt at a Solution
Solved the first part and got 111,360, the second part is where I'm going wrong.
So for the second part, first I find the total initial head
P1/pg +V1^(2)/2g +z = H
(80*10^3)/(800*9.8) + (4^2)/(2*9.8) + 0
I get 11.10, so 0.1* 11.1 = 1.11
therefore pgh = P = 8000*9.8 *1.11 = 8702.4,
then simply subtract for P2, 11360 -8702.4 = 102657.6 Pa
However this answer is wrong, what am I doing wrong?
Thanks in advance
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