Chapter 1 – Wave Plan Method
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Chapter 1 – Problem 1.26
1.26 If 100 identical pipes (of the same material, diameter, thickness, etc.) join at a junction node, and a pressure wave of magnitude 50m approaches the junction node from one of the pipes, what is the magnitude and sign of the reflected pressure wave?
Solution:
T = (2/F) / (100/F) = 0.02
R = T – 1 = -0.98
R∆H = -49m.
A pipe (with incoming pressure wave) connected to 99 other identical pipes essentially amounts to a pipe connected to a fixed head reservoir boundary where the reflection coefficient = -1.0.
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