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PRODUCT: AFT Impulse 9

TITLE: ImpVerify9.imp

REFERENCE: Fluid Transients in Systems, 1993, Prentice-Hall, E. Benjamin Wylie, Victor L. Streeter, Page 205, Example 8-10

FLUID: Water

ASSUMPTIONS: Downstream pressure constant at 64 kPa. Problem statement is merely that the downstream pressure is fixed, but the actual value is not given. To achieve the given flowrate of 0.0158 m3/sec, a pressure of 64 kPa is required. Unfortunately, the initial HGL at the specified locations of 30 and 10 meters was not able to be matched. Thus the Impulse results shown below are likely off in the vertical direction to some degree. Nevertheless, Impulse predictions follow the major trends quite well.

RESULTS:

DISCUSSION:

This experiment was designed to cause transient cavitation, and the flow does cavitate. As is common with cavitation modeling the timing of pressure spikes is marginal, but the major features and magnitude of prominent spikes is represented.

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