Rigid Water Column Model for Simulating the Emptying Process in a Pipeline Using Pressurized Air
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Volume 144, Issue 4
Abstract
This paper presents a mathematical model for analyzing the emptying process in a pipeline using pressurized air. The rigid water column model (RWCM) is used to analyze the transient phenomena that occur during the emptying of the pipeline. The air-water interface is also computed in the proposed model. The proposed model is applied along a 271.6-m-long PVC-steel pipeline with a 232-mm internal diameter. The boundary conditions are given by a high-pressure air tank at the upstream end and a manual butterfly valve at the downstream end. The solution was carried out in a computer modeling program. The results show that comparisons between both the computed and measured water flow oscillations and gauge pressures are very similar; hence, the model can effectively simulate the transient flow in this system. In addition, the results indicate that the proposed model can predict both the water flow and gauge pressure better than previous models.
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Acknowledgments
Funding for Oscar E. Coronado-Hernández (doctoral student) was covered by Fundación Centro de Estudios Interdisciplinarios Básicos y Aplicados (CEIBA)—Gobernación de Bolívar (Colombia).
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Published In
Journal of Hydraulic Engineering
Volume 144 • Issue 4 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 30, 2016
Accepted: Oct 18, 2017
Published online: Feb 1, 2018
Published in print: Apr 1, 2018
Discussion open until: Jul 1, 2018
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