Water Hammer Phenomenon in Pipeline with Inserted Flexible Tube

Michał Kubrak , Apoloniusz Kodura


The purpose of this study is to analyze the effect that inserting an elastic tube into a pressure pipeline has on the water hammer phenomenon. This research draws upon theoretical analysis, experimental testing, and numerical simulations. Assuming perfect elastic behavior of the system, the formula for the constant pressure wave velocity in a pipeline with an inserted tube was derived. Experimental tests were carried out, aimed at reducing the pressure increase in the pipeline due to inserting a silicone rubber tube in it. A significant reduction of the pressure increase has been achieved. Theoretical values of the pressure wave velocity were significantly lower than measured. Numerical calculations were performed, the purpose of which was to simulate the course of pressure changes in the pipeline with inserted tube. An approximate model of unsteady flow was used, which relates elastic behavior of water, pipeline, and tube materials to the continuity equation via the variable pressure wave velocity. By taking into account the variable celerity of the pressure wave and diffusive term, it was possible to obtain an acceptable compliance between the experimental data and the results of the numerical calculations.
Author Michał Kubrak (FEE / DHEH)
Michał Kubrak,,
- Department of Hydraulic Engineering and Hydraulics
, Apoloniusz Kodura (FEE / DHEH)
Apoloniusz Kodura,,
- Department of Hydraulic Engineering and Hydraulics
Journal seriesJournal of Hydraulic Engineering, ISSN 0733-9429, e-ISSN 1943-7900
Issue year2020
Publication size in sheets0.5
Keywords in Englishwater hammer, pressure wave velocity, wave celerity, internal tube
ASJC Classification2205 Civil and Structural Engineering; 2210 Mechanical Engineering; 2312 Water Science and Technology
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.781; WoS Impact Factor: 2018 = 2.206 (2) - 2018=2.628 (5)
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