Research Article
Nov 1974
Valve Stroking in Separated Pipe Flow
Author: Morris DrielsAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 100, Issue 11
Abstract
Apart from assessing the magnitude of a pressure surge propagated within a pipe flow system, the engineer needs to be able to reduce the surge, possibly using a process known as valve stroking. Although methods of valve stroking exist, these are not applicable to systems in which flow separation occurs due to the loss of control by the valve on the separated column. The writer develops two methods for dealing with such a situation and shows that for the first method a surge reduction of 40% is typical. These results are supported by experimental evidence. The second method indicates that a 95% reduction in the surge is possible although at present no experimental data are available to confirm this.
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Published In
Journal of the Hydraulics Division
Volume 100 • Issue 11 • November 1974
Pages: 1549 - 1563
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Nov 1974
Published online: Feb 3, 2021
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Authors
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Morris Driels
Lect., Dept. of Mech. Engrg., Univ. of Edinburgh, Edinburgh
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.