Anton Bergant (Author), Zlatko Rek (Author), Kamil Urbanowicz (Author)

Abstract

This paper deals with the analytical and numerical simulation of a water hammer in the reservoir-pipeline-valve (RPV) system. An analytical solution of the water hammer equations with unsteady friction term was derived for transient laminar pipe flow in a RPV system. For simulation of an arbitrary flow situation a number of one-dimensional (1D) numerical methods have been developed. The physically based method of characteristics proved to be computationally efficient and can handle complex boundary conditions. The accuracy of the 1D numerical model is increased by introducing terms that take into account 3D effects (example of an unsteady skin friction). The 3D model predicts these influences directly and represents an excellent tool for researching multidimensional properties of fluids (numerical laboratory). Calculation results based on 1D and 3D numerical models are in good agreement with results of measurements taking into account adequate prediction and modelling of influential physical parameters during laminar and low-Reynolds number turbulent water hammer events. Quantitative comparison analysis yields up to 2 % difference in maximum head at the valve and up to 5 % relative difference in pressure head drop at the midpoint of the pipeline monitored over the first four positive pressure pulses.

Keywords

pipeline;water hammer;analytical solution;method of characteristics;computational fluid dynamics;unsteady skin friction;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.22:621.64
COBISS: 242283011 Link will open in a new window
ISSN: 0039-2480
Views: 122
Downloads: 21
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Other data

Secondary language: Slovenian
Secondary title: Analitične, numerične 1D in 3D raziskave vodnega udara v enostavnem preizkusnem cevovodu
Secondary keywords: cevovod;vodni udar;analitična rešitev;metoda karakteristik;računalniška dinamika tekočin;nestalno stensko trenje;
Type (COBISS): Article
Pages: str. 149-156
Volume: ǂVol. ǂ71
Issue: ǂno. ǂ5/6
Chronology: 2025
DOI: 10.5545/sv-jme.2024.1179
ID: 26802396