Water Hammer and Column Separationdue to Pump Shutdown

Authors

  • John Twyman Twyman Ingenieros Consultores

Keywords:

Cavity Collapse, Cavity Length, Method of Characteristics, Water Column Separation

Abstract

The phenomenon of water column separation (WCS) and subsequent air cavity collapse (ACC) can significantly increase the maximum pressure, with risk to damage or destroy the pipelines. In this paper, the equations governing this phenomenon by applying the analysis based on the Discrete Vapor-Cavity Model (DVCM) according to theMethod of the Characteristics applied on a real pumping system discretized according to the specified time interval are shown. WCS and ACC effects are analyzed when the transient flow is generated by the pumps shutdown located in the system‘s upstream end. A sensitivity analysis on the main parameters affecting the DVCM model, with special emphasis on the effect of the number of pipe reaches chosen in the discretization and the air cavity length, is performed. It is concluded that the results depend on theinitial parameters and the way how the network is discretized.

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Published

2018-02-28

How to Cite

Twyman, J. (2018). Water Hammer and Column Separationdue to Pump Shutdown. Journal of Construction and Civil Engineering, 8(1), 19–28. Retrieved from https://revistas.ufro.cl/ojs/index.php/rioc/article/view/2001

Issue

Vol. 8 No. 1 (2018)

Section

Articles

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