Verification Case 8
PRODUCT: AFT Impulse 9
TITLE: ImpVerify8.imp
REFERENCE: Fluid Transients in Systems, 1993, Prentice-Hall, E. Benjamin Wylie, Victor L. Streeter, Page 204
FLUID: Water
ASSUMPTIONS: The problem statement from Wylie does not specify the valve closing transient. It says merely that “most” of the flow reduction occurs in the first 16 ms, and that the valve fully closes after 39 ms. It was therefore estimated that “most” means that the valve closes linearly to 3% open over 16 ms, and then linearly to fully closed at 39 ms.
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.
