Chapter 3 – What Causes Surge?
Surge Analysis and the Wave Plan Method
Supplementary Material: Example Problems and Solutions
Chapter 3 – Problem 3.4
3.4 A globe valve (whose area ratio is linearly related to the variation in its stem position) at the end of a long pipeline needs to be closed in 20s. However, the utility would like to mimic the area change with respect to stem position of a standard butterfly valve (see Figure 3.15). Determine the percent change in stem position of the globe valve for
a. 2-stage closure.
b. 3-stage closure.
c. 4-stage closure of equal time intervals
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