Numerical and experimental investigations on a shock wave related cavitational flow

G A Chochia, D G Tilley, H Nguyen-Schaefer

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Shock waves often occur in hydraulic systems, including pipes, valves and pumps due to quickly closing valves. As a result, cavitation and air-release-related bubbles are created due to local pressures in the liquid dropping below the liquid saturation pressure. The developed model, combining fluid dynamics of the flow and a numerical model of caviatation and air release, computes all flow characteristics, including the behaviour of pressure, mass flow and volumetric void fractions of vapour and air in the liquid. The occurrence of the shock waves and their relation to cavitation are explained and discussed in detail. To avoid numerical oscillations and to maintain a high numerical accuracy in shock wave flows, the total variation diminishing method is applied to discretize the equation system. Furthermore, various limiters are used to prevent the numerical solutions from overshooting or undershooting. Finally, the computational results are compared with the experimental data measured on a single pipeline terminated with a valve. This comparison shows very good agreement with the experiment.
Original languageEnglish
Pages (from-to)71-91
Number of pages21
JournalProceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering
Volume215
Issue numberI1
Publication statusPublished - 2001

Fingerprint

Shock waves
Cavitation
Liquids
Air
Plant shutdowns
Void fraction
Limiters
Fluid dynamics
Bubbles (in fluids)
Numerical models
Pipelines
Vapors
Pipe
Hydraulics
Pumps
Experiments

Cite this

Numerical and experimental investigations on a shock wave related cavitational flow. / Chochia, G A; Tilley, D G; Nguyen-Schaefer, H.

In: Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, Vol. 215, No. I1, 2001, p. 71-91.

Research output: Contribution to journalArticle

@article{ef2e5337cb2547bfb88c459913087617,
title = "Numerical and experimental investigations on a shock wave related cavitational flow",
abstract = "Shock waves often occur in hydraulic systems, including pipes, valves and pumps due to quickly closing valves. As a result, cavitation and air-release-related bubbles are created due to local pressures in the liquid dropping below the liquid saturation pressure. The developed model, combining fluid dynamics of the flow and a numerical model of caviatation and air release, computes all flow characteristics, including the behaviour of pressure, mass flow and volumetric void fractions of vapour and air in the liquid. The occurrence of the shock waves and their relation to cavitation are explained and discussed in detail. To avoid numerical oscillations and to maintain a high numerical accuracy in shock wave flows, the total variation diminishing method is applied to discretize the equation system. Furthermore, various limiters are used to prevent the numerical solutions from overshooting or undershooting. Finally, the computational results are compared with the experimental data measured on a single pipeline terminated with a valve. This comparison shows very good agreement with the experiment.",
author = "Chochia, {G A} and Tilley, {D G} and H Nguyen-Schaefer",
year = "2001",
language = "English",
volume = "215",
pages = "71--91",
journal = "Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering",
issn = "0959-6518",
publisher = "Sage Publications",
number = "I1",

}

TY - JOUR

T1 - Numerical and experimental investigations on a shock wave related cavitational flow

AU - Chochia, G A

AU - Tilley, D G

AU - Nguyen-Schaefer, H

PY - 2001

Y1 - 2001

N2 - Shock waves often occur in hydraulic systems, including pipes, valves and pumps due to quickly closing valves. As a result, cavitation and air-release-related bubbles are created due to local pressures in the liquid dropping below the liquid saturation pressure. The developed model, combining fluid dynamics of the flow and a numerical model of caviatation and air release, computes all flow characteristics, including the behaviour of pressure, mass flow and volumetric void fractions of vapour and air in the liquid. The occurrence of the shock waves and their relation to cavitation are explained and discussed in detail. To avoid numerical oscillations and to maintain a high numerical accuracy in shock wave flows, the total variation diminishing method is applied to discretize the equation system. Furthermore, various limiters are used to prevent the numerical solutions from overshooting or undershooting. Finally, the computational results are compared with the experimental data measured on a single pipeline terminated with a valve. This comparison shows very good agreement with the experiment.

AB - Shock waves often occur in hydraulic systems, including pipes, valves and pumps due to quickly closing valves. As a result, cavitation and air-release-related bubbles are created due to local pressures in the liquid dropping below the liquid saturation pressure. The developed model, combining fluid dynamics of the flow and a numerical model of caviatation and air release, computes all flow characteristics, including the behaviour of pressure, mass flow and volumetric void fractions of vapour and air in the liquid. The occurrence of the shock waves and their relation to cavitation are explained and discussed in detail. To avoid numerical oscillations and to maintain a high numerical accuracy in shock wave flows, the total variation diminishing method is applied to discretize the equation system. Furthermore, various limiters are used to prevent the numerical solutions from overshooting or undershooting. Finally, the computational results are compared with the experimental data measured on a single pipeline terminated with a valve. This comparison shows very good agreement with the experiment.

M3 - Article

VL - 215

SP - 71

EP - 91

JO - Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering

JF - Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering

SN - 0959-6518

IS - I1

ER -