Transient flow of liquid in plastic pipes
Urbanowicz, Kamil (Author), Duan, Huan-Feng (Author), Bergant, Anton (Author)

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Nowadays, plastic pipes play a key role in fluid conveyance, for example, in urban water supply systems. Dynamic analysis of designed water pipe networks requires the use of numerical methods that allow for solving basic equations that describe transient flows occurring in plastic pipes. In this paper, the main equations were formulated with pressure (p) and velocity (v) as the principal variables. A novel simplified retarded strain solution is used to properly model the pipe-wall viscoelasticity effect during transient flow process. Unsteady friction is calculated with the use of a filtered weighting function (with three exponential terms). The proposed numerical method enables the efficient modelling of transient flow in plastic pressurized pipes. Extensive simulations are performed and compared with experimental results known from three different European research centres (London, Cassino, and Lyon), with the aim of demonstrating the impacts of plastic pipe properties and frequency-dependent hydraulic resistance on transient pipe flow oscillations. The effectiveness of the proposed method for determining the creep functions of plastic pipes is also examined and discussed.

Keywords:plastic pipes, viscoelasticity, water hammer, transient flow, method of characteristics, unsteady friction
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 77-90
Numbering:Vol. 66, no. 2
ISSN on article:0039-2480
DOI:10.5545/sv-jme.2019.6324 Link is opened in a new window
COBISS.SI-ID:17045019 Link is opened in a new window
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Title:Prehodni kapljevinski tok v plastičnih ceveh
Keywords:plastične cevi, nestabilno trenje, viskoelastičnost, numerične metode

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