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Unformatted text preview: ants. If the flow rate is given, we can evaluate the
right-hand side and hence the total head loss. If the head loss is given, a little iteration
is needed, since f1, f2, and f3 all depend upon V1 through the Reynolds number. Begin
by calculating f1, f2, and f3, assuming fully rough flow, and the solution for V1 will
converge with one or two iterations. EES is ideal for this purpose.
EXAMPLE 6.17 | v v Given is a three-pipe series system, as in Fig. 6.24a. The total pressure drop is pA
Pa, and the elevation drop is zA zB 5 m. The pipe data are | e-Text Main Menu | Textbook Table of Contents | pB Study Guide 150,000 6.8 Multiple-Pipe Systems Pipe L, m d, cm , mm /d 1
0.20 377 0.003
0.005 The fluid is water,
through the system. 1000 kg/m3 and 1.02 10 6 m2/s. Calculate the flow rate Q in m3/h Solution
The total head loss across the system is
pA hA→B pB zA g 150,000
1000(9.81) zB 5m 20.3 m From the continuity relation (6.105) the velocities are
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.
- Spring '08