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Waterhammer
Overview
ARTS can analyse waterhammer problems caused by sudden pump
trip-out, with or without air vessel surge protection.
Specialised features for waterhammer include the ability to include the
vertical profile of the rising main, so that ARTS can check gauge pressure
fluctuation along the entire length of the rising main. The analysis
procedure is iterative, based on the method of characteristics. You can
set several parameters relating to the accuracy and duration of the
modeling, as well as the point at which the transient pressure fluctuation
will be plotted.
Using
ARTS to do a Waterhammer analysis
As with all problems solved by ARTS, you start by drawing a
schematic of the problem at hand. Once the system is drawn you modify the
properties of the pipes (including the rising main) and other objects on
the screen. On the press of a button, ARTS carries out the analysis and
displays the results on screen. The results displayed include a plot of
the maximum and minimum pressure envelopes, the rising main profile, the
vapour pressure line, the pressure at a user selected point, the pump and
system curves and a texual output summary of the analysis.
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