Computer analysis of the different water hammer protection systems

Document Type : Original Article

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Abstract

Water hammer is defined as a pressure surge or wave caused when a fluid  in motion is forced to stop or change direction suddenly. This pressure wave can cause major problems to transmission pipes..
The present study aims to investigate problems resulting from unsteady flow and then investigate the effect of using a protection device; air vessel only, surge tank only and air vessel with surge tank; to protect pipelines against water hammer. Through this work, the study is applied using Water Hammer Software Wanda V3.30.
In the present study for transient condition caused by pump failure, it is found that using the proposed an air vessel as a protection device proved to be effective for prevent column separation, using of air vessel with two surge towers will not effect the total volume of protection. Increases the diameter of the pipeline reduces the surge pressures and decrease the total volume required to protect the system.
Otherwise, change of pipe material type from Glass Reinforced Plastic to steel decreases the minimum pressure but does not effect the total volume required to protect the system and change of pipe material type from Glass Reinforced Plastic to concrete decreases the minimum pressure and the total volume required to protect the system. Finally found that as the air vessel volume is reduced the number of used air vessels is increased and the negative pressure of the pipe line not affected.

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ERJ. Engineering Research Journal
Volume 37, Issue 4
October 2014
Pages 431-445

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