Chapter 1 – Wave Plan Method
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Chapter 1 – Problem 1.14
1.14 Consider a simple thin-walled pipeline system with reservoirs at both ends and a valve in the middle. Flow is from the left-hand reservoir to the right-hand reservoir under steady state conditions.
Closing the valve instantaneously generates unsteady flow conditions. Select all applicable answers listed below.
i. A positive pressure wave is generated on the upstream side of the valve.
ii. A negative pressure wave is generated on the downstream side of the valve.
iii. A negative pressure wave is generated on the upstream side of the valve.
iv. A positive pressure wave is generated on the downstream side of the valve.
v. When a pressure wave moves in the direction of flow, the pressure wave is positive if flow decreases, and is negative if flow increases.
vi. When a pressure wave moves in the direction of flow, the pressure wave is negative if flow decreases, and is positive if flow increases.
vii. When a pressure wave moves opposite to the flow direction, the pressure wave is positive if flow increases, and is negative if flow decreases.
viii. When a pressure wave moves opposite to the flow direction, the pressure wave is negative if flow increases, and is positive if flow decreases.
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